About window on Beaglebone

[taek8461]

Hi I am testing LCD with Beaglebone black.
LCD and BBB are connected via HDMI.

when I booted BBB, LCD showed only text like the picture below

I want LCD to show grahic screen like winow (x window).
I dont know how to set up config.
Can you help me that LCD shows the graphics window on the screen?

Below is the uEnv.txt

uname_r=4.19.31-bone-rt-r31
enable_uboot_overlays=1
uboot_overlay_pru=/lib/firmware/AM335X-PRU-RPROC-4-14-TI-00A0.dtbo
enable_uboot_overlays_video=1
enable_uboot_cape_universal=1
cmdline=coherent_pool=1M net.ifnames=0 quiet
#cmdline=init=/boot/flash_to_eMMC.sh

Below is the message when booting.
U-Boot 2019.01-dirty (Nov 30 2021 - 03:28:04 -0800)

CPU  : AM335X-GP rev 2.1
I2C:   ready
DRAM:  512 MiB
No match for driver 'omap_hsmmc'
No match for driver 'omap_hsmmc'
Some drivers were not found
Reset Source: Power-on reset has occurred.
RTC 32KCLK Source: External.
MMC:   OMAP SD/MMC: 0, OMAP SD/MMC: 1
Loading Environment from EXT4... ** File not found /boot/uboot.env **

** Unable to read "/boot/uboot.env" from mmc0:1 **
Board: BeagleBone Black
<ethaddr> not set. Validating first E-fuse MAC
BeagleBone Black:
BeagleBone: cape eeprom: i2c_probe: 0x54:
BeagleBone: cape eeprom: i2c_probe: 0x55:
BeagleBone: cape eeprom: i2c_probe: 0x56:
BeagleBone: cape eeprom: i2c_probe: 0x57:
Net:   eth0: MII MODE
cpsw, usb_ether
Press SPACE to abort autoboot in 2 seconds
board_name=[A335BNLT] ...
board_rev=[000C] ...
switch to partitions #0, OK
mmc0 is current device
SD/MMC found on device 0
switch to partitions #0, OK 
mmc0 is current device
Scanning mmc 0:1...
gpio: pin 56 (gpio 56) value is 0
gpio: pin 55 (gpio 55) value is 0
gpio: pin 54 (gpio 54) value is 0
gpio: pin 53 (gpio 53) value is 1
switch to partitions #0, OK
mmc0 is current device
gpio: pin 54 (gpio 54) value is 1
Checking for: /uEnv.txt ...
Checking for: /boot.scr ...
Checking for: /boot/boot.scr ...
Checking for: /boot/uEnv.txt ...
gpio: pin 55 (gpio 55) value is 1
261 bytes read in 14 ms (17.6 KiB/s)
Loaded environment from /boot/uEnv.txt
Checking if uname_r is set in /boot/uEnv.txt...
gpio: pin 56 (gpio 56) value is 1
Running uname_boot ...
loading /boot/vmlinuz-4.19.31-bone-rt-r31 ...
8020480 bytes read in 519 ms (14.7 MiB/s)
debug: [enable_uboot_overlays=1] ...
debug: [enable_uboot_cape_universal=1] ...
debug: [uboot_base_dtb_univ=am335x-boneblack-uboot-univ.dtb] ...
uboot_overlays: [uboot_base_dtb=am335x-boneblack-uboot-univ.dtb] ...
uboot_overlays: Switching too: dtb=am335x-boneblack-uboot-univ.dtb ...
loading /boot/dtbs/4.19.31-bone-rt-r31/am335x-boneblack-uboot-univ.dtb ...
158234 bytes read in 37 ms (4.1 MiB/s)
uboot_overlays: [fdt_buffer=0x60000] ...
uboot_overlays: loading /lib/firmware/BB-BONE-eMMC1-01-00A0.dtbo ...
1440 bytes read in 172 ms (7.8 KiB/s)
uboot_overlays: loading /lib/firmware/BB-HDMI-TDA998x-00A0.dtbo ...
4896 bytes read in 79 ms (59.6 KiB/s)
uboot_overlays: loading /lib/firmware/BB-ADC-00A0.dtbo ...
711 bytes read in 137 ms (4.9 KiB/s)
uboot_overlays: loading /lib/firmware/AM335X-PRU-RPROC-4-14-TI-00A0.dtbo ...
3513 bytes read in 171 ms (19.5 KiB/s)
debug: [console=ttyO0,115200n8 bone_capemgr.uboot_capemgr_enabled=1 root=/dev/mmcblk0p1 ro rootfstype=ext4 rootwait 
coherent_pool=1M net.ifnames=0 quiet] ...
debug: [bootz 0x82000000 - 88000000] ...
## Flattened Device Tree blob at 88000000
   Booting using the fdt blob at 0x88000000
   reserving fdt memory region: addr=88000000 size=88000
   Loading Device Tree to 8ff75000, end 8fffffff ... OK

Starting kernel ...

[    0.001330] timer_probe: no matching timers found
[    0.236152] l4_wkup_cm:clk:0010:0: failed to disable
[    0.529151] wkup_m3_ipc 44e11324.wkup_m3_ipc: could not get rproc handle
[    0.878321] omap_voltage_late_init: Voltage driver support not added
[FAILED] Failed to start Raise network interfaces.
See 'systemctl status networking.service' for details.
[  OK  ] Reached target Network.
         Starting Permit User Sessions...
         Starting A high performance web server and a reverse proxy server...
         Starting OpenBSD Secure Shell server...
[  OK  ] Reached target Network is Online.
         Starting LSB: Advanced IEEE 802.11 management daemon...
[  OK  ] Started Permit User Sessions.
[  OK  ] Started LSB: Advanced IEEE 802.11 management daemon.
[  OK  ] Started Getty on tty1.
[  OK  ] Found device /dev/ttyS0.
[  OK  ] Started Serial Getty on ttyS0.
[  OK  ] Started OpenBSD Secure Shell server.
[  OK  ] Started A high performance web server and a reverse proxy server.
         Stopping LSB: Start busybox udhcpd at boot time...
[  OK  ] Stopped LSB: Start busybox udhcpd at boot time.
         Starting dnsmasq - A lightweight DHCP and caching DNS server...
[  OK  ] Started dnsmasq - A lightweight DHCP and caching DNS server.
[  OK  ] Reached target Host and Network Name Lookups.

Debian GNU/Linux 9 arm ttyS0

default username:password is [debian:temppwd]

arm login: root (automatic login)

Last login: Wed Dec  1 12:43:10 UTC 2021 on ttyS0

The programs included with the Debian GNU/Linux system are free software;
the exact distribution terms for each program are described in the
individual files in /usr/share/doc/*/copyright.

Debian GNU/Linux comes with ABSOLUTELY NO WARRANTY, to the extent
permitted by applicable law.
root@arm:~#

[RobertCNelson]

Hi @taek8461 once you configure xorg/hdmi as shown here: Debian: Getting Started with the BeagleBone Black

Make sure to install, fbdev driver and xrandr utilities:

sudo apt update
sudo apt install read-edid xserver-xorg-video-fbdev x11-xserver-utils

#/etc/X11/xorg.conf
Section "Monitor"
        Identifier      "Builtin Default Monitor"
EndSection
Section "Device"
        Identifier      "Builtin Default fbdev Device 0"
        Driver          "fbdev"
EndSection
Section "Screen"
        Identifier      "Builtin Default fbdev Screen 0"
        Device          "Builtin Default fbdev Device 0"
        Monitor         "Builtin Default Monitor"
EndSection
Section "ServerLayout"
        Identifier      "Builtin Default Layout"
        Screen          "Builtin Default fbdev Screen 0"
EndSection

Then feel free to install any of the linux window managers…

Regards,

[taek8461]

thank you for your help.
I succeeded in making graphic window visible on lcd with your help

I have a new problem.
I want to automatically disable the login screen at bootup.
Below is the screen after booting.

Please let me know how to make the login dialog not appear automatically at boot time.

[RobertCNelson]

Hi @taek8461 there are different instructions for each login manager… Did you install lightdm, xdm, sdm, or etc…

Regards,

[taek8461]

HI
I installed read-edid, xserver-xorg-video-fbdev and x11-xserver-utils.
and I installed lxde, xfce, kde and gnome.

when I run the progroms, it looks like the picture below

Maybe, lightdm is installed, right?
please, let me know how to disable the login screen.

and I have another question.
After a while without touching the LCD screen, the screen turns off. It’s probably in screen save mode.
Do you know how to make the screen always on?
thank you.
Regards.

[RobertCNelson]

@taek8461

Maybe, lightdm is installed, right?
please, let me know how to disable the login screen.

With lightdm, you need to edit, /etc/lightdm/lightdm.conf

#autologin-user=
#autologin-session=

Un-comment both (#) and add your user name, session should be which desktop you want, xfce, kde, lxqt, etc… You should have some versions here:

ls /usr/share/xsessions/*.desktop

@taek8461

After a while without touching the LCD screen, the screen turns off. It’s probably in screen save mode.
Do you know how to make the screen always on?

Hard to tell with no dmesg information…

Regards,

[taek8461]

thank you for your help.

here is dmesg

debian@arm:~$ dmesg
[    0.000000] Booting Linux on physical CPU 0x0
[    0.000000] Linux version 4.19.31-bone-rt-r31 (root@ubuntu) (gcc version 8.3.0 (GNU Toolchain for the A-profile Architecture 8.3-2019.03 (arm-rel-8.36))) #4 PREEMPT RT Thu Nov 11 01:08:01 PST 2021
[    0.000000] CPU: ARMv7 Processor [413fc082] revision 2 (ARMv7), cr=50c5387d
[    0.000000] CPU: PIPT / VIPT nonaliasing data cache, VIPT aliasing instruction cache
[    0.000000] OF: fdt: Machine model: TI AM335x BeagleBone Black
[    0.000000] Memory policy: Data cache writeback
[    0.000000] efi: Getting EFI parameters from FDT:
[    0.000000] efi: UEFI not found.
[    0.000000] cma: Reserved 48 MiB at 0x9d000000
[    0.000000] On node 0 totalpages: 131072
[    0.000000]   Normal zone: 1152 pages used for memmap
[    0.000000]   Normal zone: 0 pages reserved
[    0.000000]   Normal zone: 131072 pages, LIFO batch:31
[    0.000000] CPU: All CPU(s) started in SVC mode.
[    0.000000] AM335X ES2.1 (sgx neon)
[    0.000000] random: get_random_bytes called from start_kernel+0x7b/0x410 with crng_init=0
[    0.000000] pcpu-alloc: s0 r0 d32768 u32768 alloc=1*32768
[    0.000000] pcpu-alloc: [0] 0
[    0.000000] Built 1 zonelists, mobility grouping on.  Total pages: 129920
[    0.000000] Kernel command line: console=ttyO0,115200n8 bone_capemgr.uboot_capemgr_enabled=1 root=/dev/mmcblk0p1 ro rootfstype=ext4 rootwait coherent_pool=1M net.ifnames=0 quiet
[    0.000000] Dentry cache hash table entries: 65536 (order: 6, 262144 bytes)
[    0.000000] Inode-cache hash table entries: 32768 (order: 5, 131072 bytes)
[    0.000000] Memory: 454316K/524288K available (8192K kernel code, 954K rwdata, 3064K rodata, 1024K init, 331K bss, 20820K reserved, 49152K cma-reserved, 0K highmem)
[    0.000000] Virtual kernel memory layout:
                   vector  : 0xffff0000 - 0xffff1000   (   4 kB)
                   fixmap  : 0xffc00000 - 0xfff00000   (3072 kB)
                   vmalloc : 0xe0800000 - 0xff800000   ( 496 MB)
                   lowmem  : 0xc0000000 - 0xe0000000   ( 512 MB)
                   pkmap   : 0xbfe00000 - 0xc0000000   (   2 MB)
                   modules : 0xbf800000 - 0xbfe00000   (   6 MB)
                     .text : 0x(ptrval) - 0x(ptrval)   (9184 kB)
                     .init : 0x(ptrval) - 0x(ptrval)   (1024 kB)
                     .data : 0x(ptrval) - 0x(ptrval)   ( 955 kB)
                      .bss : 0x(ptrval) - 0x(ptrval)   ( 332 kB)
[    0.000000] SLUB: HWalign=64, Order=0-3, MinObjects=0, CPUs=1, Nodes=1
[    0.000000] ftrace: allocating 38347 entries in 75 pages
[    0.000000] rcu: Preemptible hierarchical RCU implementation.
[    0.000000] rcu:     RCU priority boosting: priority 1 delay 500 ms.
[    0.000000]  No expedited grace period (rcu_normal_after_boot).
[    0.000000]  Tasks RCU enabled.
[    0.000000] NR_IRQS: 16, nr_irqs: 16, preallocated irqs: 16
[    0.000000] IRQ: Found an INTC at 0x(ptrval) (revision 5.0) with 128 interrupts
[    0.000000] OMAP clockevent source: timer2 at 24000000 Hz
[    0.000020] sched_clock: 32 bits at 24MHz, resolution 41ns, wraps every 89478484971ns
[    0.000033] clocksource: timer1: mask: 0xffffffff max_cycles: 0xffffffff, max_idle_ns: 79635851949 ns
[    0.000042] OMAP clocksource: timer1 at 24000000 Hz
[    0.001335] timer_probe: no matching timers found
[    0.001540] Console: colour dummy device 80x30
[    0.001582] WARNING: Your 'console=ttyO0' has been replaced by 'ttyS0'
[    0.001584] This ensures that you still see kernel messages. Please
[    0.001586] update your kernel commandline.
[    0.001619] Calibrating delay loop... 995.32 BogoMIPS (lpj=1990656)
[    0.017673] pid_max: default: 32768 minimum: 301
[    0.017938] Security Framework initialized
[    0.017957] Yama: becoming mindful.
[    0.018080] AppArmor: AppArmor initialized
[    0.018165] Mount-cache hash table entries: 1024 (order: 0, 4096 bytes)
[    0.018174] Mountpoint-cache hash table entries: 1024 (order: 0, 4096 bytes)
[    0.019122] CPU: Testing write buffer coherency: ok
[    0.019169] CPU0: Spectre v2: using BPIALL workaround
[    0.020112] Setting up static identity map for 0x80100000 - 0x80100054
[    0.020367] rcu: Hierarchical SRCU implementation.
[    0.023565] EFI services will not be available.
[    0.025061] devtmpfs: initialized
[    0.053513] VFP support v0.3: implementor 41 architecture 3 part 30 variant c rev 3
[    0.054128] clocksource: jiffies: mask: 0xffffffff max_cycles: 0xffffffff, max_idle_ns: 7645041785100000 ns
[    0.054148] futex hash table entries: 256 (order: 1, 8192 bytes)
[    0.057644] xor: measuring software checksum speed
[    0.097683]    arm4regs  :  1221.000 MB/sec
[    0.137670]    8regs     :  1094.000 MB/sec
[    0.177668]    32regs    :  1055.000 MB/sec
[    0.177674] xor: using function: arm4regs (1221.000 MB/sec)
[    0.177690] pinctrl core: initialized pinctrl subsystem
[    0.178471] DMI not present or invalid.
[    0.178912] NET: Registered protocol family 16
[    0.182983] DMA: preallocated 1024 KiB pool for atomic coherent allocations
[    0.240013] l4_wkup_cm:clk:0010:0: failed to disable
[    0.280078] audit: initializing netlink subsys (disabled)
[    0.285765] audit: type=2000 audit(0.280:1): state=initialized audit_enabled=0 res=1
[    0.287335] OMAP GPIO hardware version 0.1
[    0.305146] No ATAGs?
[    0.305162] hw-breakpoint: debug architecture 0x4 unsupported.
[    0.317630] raid6: using algorithm int32x8 gen() 0 MB/s
[    0.317640] raid6: .... xor() 0 MB/s, rmw enabled
[    0.317645] raid6: using intx1 recovery algorithm
[    0.324286] edma 49000000.edma: TI EDMA DMA engine driver
[    0.328227] SCSI subsystem initialized
[    0.328302] libata version 3.00 loaded.
[    0.328542] usbcore: registered new interface driver usbfs
[    0.328591] usbcore: registered new interface driver hub
[    0.328780] usbcore: registered new device driver usb
[    0.330320] omap_i2c 4802a000.i2c: bus 1 rev0.11 at 100 kHz
[    0.331453] omap_i2c 4819c000.i2c: bus 2 rev0.11 at 100 kHz
[    0.331857] pps_core: LinuxPPS API ver. 1 registered
[    0.331864] pps_core: Software ver. 5.3.6 - Copyright 2005-2007 Rodolfo Giometti <giometti@linux.it>
[    0.331884] PTP clock support registered
[    0.332416] omap-mailbox 480c8000.mailbox: omap mailbox rev 0x400
[    0.333140] Advanced Linux Sound Architecture Driver Initialized.
[    0.333884] NetLabel: Initializing
[    0.333893] NetLabel:  domain hash size = 128
[    0.333897] NetLabel:  protocols = UNLABELED CIPSOv4 CALIPSO
[    0.333975] NetLabel:  unlabeled traffic allowed by default
[    0.334748] clocksource: Switched to clocksource timer1
[    0.471076] VFS: Disk quotas dquot_6.6.0
[    0.471158] VFS: Dquot-cache hash table entries: 1024 (order 0, 4096 bytes)
[    0.471902] AppArmor: AppArmor Filesystem Enabled
[    0.482219] NET: Registered protocol family 2
[    0.483308] tcp_listen_portaddr_hash hash table entries: 256 (order: 0, 7168 bytes)
[    0.483343] TCP established hash table entries: 4096 (order: 2, 16384 bytes)
[    0.483396] TCP bind hash table entries: 4096 (order: 4, 98304 bytes)
[    0.483515] TCP: Hash tables configured (established 4096 bind 4096)
[    0.483625] UDP hash table entries: 256 (order: 2, 16384 bytes)
[    0.483655] UDP-Lite hash table entries: 256 (order: 2, 16384 bytes)
[    0.483889] NET: Registered protocol family 1
[    0.484635] RPC: Registered named UNIX socket transport module.
[    0.484642] RPC: Registered udp transport module.
[    0.484646] RPC: Registered tcp transport module.
[    0.484650] RPC: Registered tcp NFSv4.1 backchannel transport module.
[    0.485486] hw perfevents: enabled with armv7_cortex_a8 PMU driver, 5 counters available
[    0.491983] Initialise system trusted keyrings
[    0.492308] workingset: timestamp_bits=14 max_order=17 bucket_order=3
[    0.498564] zbud: loaded
[    0.501772] NFS: Registering the id_resolver key type
[    0.501809] Key type id_resolver registered
[    0.501814] Key type id_legacy registered
[    0.501830] nfs4filelayout_init: NFSv4 File Layout Driver Registering...
[    0.502126] fuse init (API version 7.27)
[    0.510065] Key type asymmetric registered
[    0.510077] Asymmetric key parser 'x509' registered
[    0.510157] Block layer SCSI generic (bsg) driver version 0.4 loaded (major 246)
[    0.510378] io scheduler noop registered
[    0.510385] io scheduler deadline registered
[    0.510941] io scheduler cfq registered (default)
[    0.510950] io scheduler mq-deadline registered
[    0.512758] pinctrl-single 44e10800.pinmux: 142 pins, size 568
[    0.524081] gpio-of-helper ocp:cape-universal: ready
[    0.533141] wkup_m3_ipc 44e11324.wkup_m3_ipc: could not get rproc handle
[    0.535082] Serial: 8250/16550 driver, 6 ports, IRQ sharing disabled
[    0.537940] 44e09000.serial: ttyS0 at MMIO 0x44e09000 (irq = 30, base_baud = 3000000) is a 8250
[    0.554593] console [ttyS0] enabled
[    0.555577] 48022000.serial: ttyS1 at MMIO 0x48022000 (irq = 31, base_baud = 3000000) is a 8250
[    0.556334] 48024000.serial: ttyS2 at MMIO 0x48024000 (irq = 32, base_baud = 3000000) is a 8250
[    0.557033] 481a6000.serial: ttyS3 at MMIO 0x481a6000 (irq = 33, base_baud = 3000000) is a 8250
[    0.557706] 481a8000.serial: ttyS4 at MMIO 0x481a8000 (irq = 34, base_baud = 3000000) is a 8250
[    0.558408] 481aa000.serial: ttyS5 at MMIO 0x481aa000 (irq = 35, base_baud = 3000000) is a 8250
[    0.561496] omap_rng 48310000.rng: Random Number Generator ver. 20
[    0.676572] eqep 48300180.eqep: ver. 1.0
[    0.676987] eqep 48300180.eqep: count_mode:0
[    0.676997] eqep 48300180.eqep: invert_qa:1
[    0.677004] eqep 48300180.eqep: invert_qb:1
[    0.677011] eqep 48300180.eqep: invert_qi:0
[    0.677018] eqep 48300180.eqep: invert_qs:0
[    0.677025] eqep 48300180.eqep: swap_inputs:0
[    0.677032] eqep 48300180.eqep: QDECCTL:0x0180
[    0.677039] eqep 48300180.eqep: QPOSINIT:0x00000000
[    0.677045] eqep 48300180.eqep: QPOSMAX:0xffffffff
[    0.677051] eqep 48300180.eqep: QPOSCNT:0x00000000
[    0.677058] eqep 48300180.eqep: omit_interrupt:0
[    0.677064] eqep 48300180.eqep: QEINT:0x0800
[    0.677070] eqep 48300180.eqep: QUPRD:0x05f5e100
[    0.677077] eqep 48300180.eqep: QEPCTL:0x009e write
[    0.677083] eqep 48300180.eqep: QEPCTL:0x009e read
[    0.677104] eqep 48300180.eqep: irq:136, clk_rate:100000000
[    0.677346] eqep 48302180.eqep: ver. 1.0
[    0.677621] eqep 48302180.eqep: count_mode:0
[    0.677630] eqep 48302180.eqep: invert_qa:1
[    0.677637] eqep 48302180.eqep: invert_qb:1
[    0.677644] eqep 48302180.eqep: invert_qi:0
[    0.677650] eqep 48302180.eqep: invert_qs:0
[    0.677657] eqep 48302180.eqep: swap_inputs:0
[    0.677663] eqep 48302180.eqep: QDECCTL:0x0180
[    0.677670] eqep 48302180.eqep: QPOSINIT:0x00000000
[    0.677676] eqep 48302180.eqep: QPOSMAX:0xffffffff
[    0.677682] eqep 48302180.eqep: QPOSCNT:0x00000000
[    0.677688] eqep 48302180.eqep: omit_interrupt:0
[    0.677694] eqep 48302180.eqep: QEINT:0x0800
[    0.677700] eqep 48302180.eqep: QUPRD:0x05f5e100
[    0.677706] eqep 48302180.eqep: QEPCTL:0x009e write
[    0.677713] eqep 48302180.eqep: QEPCTL:0x009e read
[    0.677729] eqep 48302180.eqep: irq:138, clk_rate:100000000
[    0.677867] eqep 48304180.eqep: ver. 1.0
[    0.678117] eqep 48304180.eqep: count_mode:0
[    0.678126] eqep 48304180.eqep: invert_qa:1
[    0.678132] eqep 48304180.eqep: invert_qb:1
[    0.678139] eqep 48304180.eqep: invert_qi:0
[    0.678146] eqep 48304180.eqep: invert_qs:0
[    0.678153] eqep 48304180.eqep: swap_inputs:0
[    0.678159] eqep 48304180.eqep: QDECCTL:0x0180
[    0.678166] eqep 48304180.eqep: QPOSINIT:0x00000000
[    0.678172] eqep 48304180.eqep: QPOSMAX:0xffffffff
[    0.678177] eqep 48304180.eqep: QPOSCNT:0x00000000
[    0.678184] eqep 48304180.eqep: omit_interrupt:0
[    0.678189] eqep 48304180.eqep: QEINT:0x0800
[    0.678195] eqep 48304180.eqep: QUPRD:0x05f5e100
[    0.678201] eqep 48304180.eqep: QEPCTL:0x009e write
[    0.678207] eqep 48304180.eqep: QEPCTL:0x009e read
[    0.678222] eqep 48304180.eqep: irq:140, clk_rate:100000000
[    0.713065] libphy: Fixed MDIO Bus: probed
[    0.713951] CAN device driver interface
[    0.715260] c_can_platform 481cc000.can: c_can_platform device registered (regs=(ptrval), irq=42)
[    0.716078] c_can_platform 481d0000.can: c_can_platform device registered (regs=(ptrval), irq=43)
[    0.770857] davinci_mdio 4a101000.mdio: davinci mdio revision 1.6, bus freq 1000000
[    0.770868] davinci_mdio 4a101000.mdio: detected phy mask fffffffe
[    0.771829] davinci_mdio: dt: updated phy_id[0] from phy_mask[fffffffe]
[    0.773749] libphy: 4a101000.mdio: probed
[    0.773771] davinci_mdio 4a101000.mdio: phy[0]: device 4a101000.mdio:00, driver SMSC LAN8710/LAN8720
[    0.774577] cpsw 4a100000.ethernet: Detected MACID = f4:5e:ab:34:78:60
[    0.774678] cpsw 4a100000.ethernet: initialized cpsw ale version 1.4
[    0.774685] cpsw 4a100000.ethernet: ALE Table size 1024
[    0.774716] cpsw 4a100000.ethernet: cpts: overflow check period 1250 (jiffies)
[    0.776829] usbcore: registered new interface driver simcom_wwan
[    0.777414] usbcore: registered new interface driver usb-storage
[    0.777527] usbcore: registered new interface driver usbserial_generic
[    0.777566] usbserial: USB Serial support registered for generic
[    0.777599] usbcore: registered new interface driver option
[    0.777627] usbserial: USB Serial support registered for GSM modem (1-port)
[    0.780715] am335x-phy-driver 47401300.usb-phy: 47401300.usb-phy supply vcc not found, using dummy regulator
[    0.780848] am335x-phy-driver 47401300.usb-phy: Linked as a consumer to regulator.0
[    0.783752] am335x-phy-driver 47401b00.usb-phy: 47401b00.usb-phy supply vcc not found, using dummy regulator
[    0.783912] am335x-phy-driver 47401b00.usb-phy: Linked as a consumer to regulator.0
[    0.786955] musb-hdrc musb-hdrc.1: MUSB HDRC host driver
[    0.786989] musb-hdrc musb-hdrc.1: new USB bus registered, assigned bus number 1
[    0.787273] usb usb1: New USB device found, idVendor=1d6b, idProduct=0002, bcdDevice= 4.19
[    0.787283] usb usb1: New USB device strings: Mfr=3, Product=2, SerialNumber=1
[    0.787290] usb usb1: Product: MUSB HDRC host driver
[    0.787296] usb usb1: Manufacturer: Linux 4.19.31-bone-rt-r31 musb-hcd
[    0.787302] usb usb1: SerialNumber: musb-hdrc.1
[    0.787998] hub 1-0:1.0: USB hub found
[    0.788050] hub 1-0:1.0: 1 port detected
[    0.798456] omap_rtc 44e3e000.rtc: registered as rtc0
[    0.799717] i2c /dev entries driver
[    0.802608] omap_wdt: OMAP Watchdog Timer Rev 0x01: initial timeout 60 sec
[    0.803207] softdog: initialized. soft_noboot=0 soft_margin=60 sec soft_panic=0 (nowayout=0)
[    0.806011] omap_gpio 44e07000.gpio: Could not set line 6 debounce to 200000 microseconds (-22)
[    0.806024] omap_hsmmc 48060000.mmc: Got CD GPIO
[    0.806918] omap_hsmmc 48060000.mmc: Linked as a consumer to regulator.1
[    0.834260] omap_hsmmc 481d8000.mmc: Linked as a consumer to regulator.1
[    0.861153] omap-aes 53500000.aes: OMAP AES hw accel rev: 3.2
[    0.861447] omap-aes 53500000.aes: will run requests pump with realtime priority
[    0.863988] omap-sham 53100000.sham: hw accel on OMAP rev 4.3
[    0.867826] hidraw: raw HID events driver (C) Jiri Kosina
[    0.868367] usbcore: registered new interface driver usbhid
[    0.868374] usbhid: USB HID core driver
[    0.868700] remoteproc remoteproc0: wkup_m3 is available
[    0.872767] gnss: GNSS driver registered with major 242
[    0.878058] NET: Registered protocol family 10
[    0.881658] Segment Routing with IPv6
[    0.881770] mip6: Mobile IPv6
[    0.881785] NET: Registered protocol family 17
[    0.881809] can: controller area network core (rev 20170425 abi 9)
[    0.881901] NET: Registered protocol family 29
[    0.882028] Key type dns_resolver registered
[    0.882034] mpls_gso: MPLS GSO support
[    0.882273] ThumbEE CPU extension supported.
[    0.882286] Registering SWP/SWPB emulation handler
[    0.882295] omap_voltage_late_init: Voltage driver support not added
[    0.890618] registered taskstats version 1
[    0.890627] Loading compiled-in X.509 certificates
[    0.891228] zswap: loaded using pool lzo/zbud
[    0.893477] mmc0: host does not support reading read-only switch, assuming write-enable
[    0.893911] Btrfs loaded, crc32c=crc32c-generic
[    0.894013] AppArmor: AppArmor sha1 policy hashing enabled
[    0.896375] mmc0: new high speed SDHC card at address aaaa
[    0.903680] mmcblk0: mmc0:aaaa SB16G 14.8 GiB
[    0.907141]  mmcblk0: p1
[    0.931608] mmc1: new high speed MMC card at address 0001
[    0.932882] mmcblk1: mmc1:0001 S10004 3.56 GiB
[    0.933420] mmcblk1boot0: mmc1:0001 S10004 partition 1 4.00 MiB
[    0.933941] mmcblk1boot1: mmc1:0001 S10004 partition 2 4.00 MiB
[    0.934198] mmcblk1rpmb: mmc1:0001 S10004 partition 3 4.00 MiB, chardev (244:0)
[    0.935461]  mmcblk1: p1
[    1.060937] random: fast init done
[    1.061180] tda998x 0-0070: found TDA19988
[    1.064134] tilcdc 4830e000.lcdc: bound 0-0070 (ops 0xc0982540)
[    1.064154] [drm] Supports vblank timestamp caching Rev 2 (21.10.2013).
[    1.064159] [drm] No driver support for vblank timestamp query.
[    1.168120] Console: switching to colour frame buffer device 128x37
[    1.184241] tilcdc 4830e000.lcdc: fb0: DRM emulated frame buffer device
[    1.184915] [drm] Initialized tilcdc 1.0.0 20121205 for 4830e000.lcdc on minor 0
[    1.194888] usb 1-1: new high-speed USB device number 2 using musb-hdrc
[    1.195952] tps6521x_pwrbutton tps65217-pwrbutton: DMA mask not set
[    1.196614] input: tps65217_pwr_but as /devices/platform/ocp/44e0b000.i2c/i2c-0/0-0024/tps65217-pwrbutton/input/input0
[    1.197088] tps65217 0-0024: TPS65217 ID 0xe version 1.2
[    1.197792] at24 0-0050: 32768 byte 24c256 EEPROM, writable, 1 bytes/write
[    1.197872] omap_i2c 44e0b000.i2c: bus 0 rev0.11 at 400 kHz
[    1.199341] remoteproc remoteproc0: powering up wkup_m3
[    1.199359] remoteproc remoteproc0: Booting fw image am335x-pm-firmware.elf, size 217168
[    1.201437] remoteproc remoteproc0: remote processor wkup_m3 is now up
[    1.201480] wkup_m3_ipc 44e11324.wkup_m3_ipc: CM3 Firmware Version = 0x193
[    1.202737] cpu cpu0: Linked as a consumer to regulator.3
[    1.202943] cpu cpu0: Dropping the link to regulator.3
[    1.203336] cpu cpu0: Linked as a consumer to regulator.3
[    1.205630] asoc-simple-card sound: i2s-hifi <-> 48038000.mcasp mapping ok
[    1.205664] asoc-simple-card sound: ASoC: no DMI vendor name!
[    1.208285] omap_rtc 44e3e000.rtc: setting system clock to 2000-01-01 00:00:00 UTC (946684800)
[    1.209656] ALSA device list:
[    1.209664]   #0: TI BeagleBone Black
[    1.215027] EXT4-fs (mmcblk0p1): INFO: recovery required on readonly filesystem
[    1.215037] EXT4-fs (mmcblk0p1): write access will be enabled during recovery
[    1.343260] usb 1-1: New USB device found, idVendor=0451, idProduct=8142, bcdDevice= 1.00
[    1.343273] usb 1-1: New USB device strings: Mfr=0, Product=0, SerialNumber=1
[    1.343280] usb 1-1: SerialNumber: 19000861BD59
[    1.344262] hub 1-1:1.0: USB hub found
[    1.344360] hub 1-1:1.0: 4 ports detected
[    1.630873] usb 1-1.1: new high-speed USB device number 3 using musb-hdrc
[    1.736424] usb 1-1.1: New USB device found, idVendor=2109, idProduct=2813, bcdDevice= 2.21
[    1.736439] usb 1-1.1: New USB device strings: Mfr=1, Product=2, SerialNumber=0
[    1.736446] usb 1-1.1: Product: USB2.0 Hub
[    1.736453] usb 1-1.1: Manufacturer: VIA Labs, Inc.       
[    1.737872] hub 1-1.1:1.0: USB hub found
[    1.738520] hub 1-1.1:1.0: 4 ports detected
[    1.830839] usb 1-1.2: new high-speed USB device number 4 using musb-hdrc
[    1.942881] usb 1-1.2: New USB device found, idVendor=1e0e, idProduct=9001, bcdDevice= 3.18
[    1.942894] usb 1-1.2: New USB device strings: Mfr=1, Product=2, SerialNumber=3
[    1.942901] usb 1-1.2: Product: SimTech, Incorporated
[    1.942908] usb 1-1.2: Manufacturer: SimTech, Incorporated
[    1.942914] usb 1-1.2: SerialNumber: 0123456789ABCDEF
[    1.946078] simcom_wwan: probe of 1-1.2:1.0 failed with error -22
[    1.946542] option 1-1.2:1.0: GSM modem (1-port) converter detected
[    1.947433] usb 1-1.2: GSM modem (1-port) converter now attached to ttyUSB0
[    1.947869] simcom_wwan: probe of 1-1.2:1.1 failed with error -22
[    1.948485] option 1-1.2:1.1: GSM modem (1-port) converter detected
[    1.948983] usb 1-1.2: GSM modem (1-port) converter now attached to ttyUSB1
[    1.949738] simcom_wwan: probe of 1-1.2:1.2 failed with error -22
[    1.950315] option 1-1.2:1.2: GSM modem (1-port) converter detected
[    1.950931] usb 1-1.2: GSM modem (1-port) converter now attached to ttyUSB2
[    1.951717] simcom_wwan: probe of 1-1.2:1.3 failed with error -22
[    1.952305] option 1-1.2:1.3: GSM modem (1-port) converter detected
[    1.952832] usb 1-1.2: GSM modem (1-port) converter now attached to ttyUSB3
[    1.953595] simcom_wwan: probe of 1-1.2:1.4 failed with error -22
[    1.954194] option 1-1.2:1.4: GSM modem (1-port) converter detected
[    1.954652] usb 1-1.2: GSM modem (1-port) converter now attached to ttyUSB4
[    1.955668] simcom usbnet bind here
[    1.957459] simcom_wwan 1-1.2:1.5 wwan0: register 'simcom_wwan' at usb-musb-hdrc.1-1.2, SIMCOM wwan/QMI device, d6:d9:b9:97:18:4e
[    2.050845] usb 1-1.1.1: new full-speed USB device number 5 using musb-hdrc
[    2.164234] usb 1-1.1.1: New USB device found, idVendor=0484, idProduct=5750, bcdDevice= 2.00
[    2.164246] usb 1-1.1.1: New USB device strings: Mfr=1, Product=2, SerialNumber=3
[    2.164253] usb 1-1.1.1: Product: 7H Custom Human interface
[    2.164392] usb 1-1.1.1: Manufacturer: STMicroelectronics
[    2.164399] usb 1-1.1.1: SerialNumber: 677F5AB80137
[    2.180465] input: STMicroelectronics 7H Custom Human interface Touchscreen as /devices/platform/ocp/47400000.usb/47401c00.usb/musb-hdrc.1/usb1/1-1/1-1.1/1-1.1.1/1-1.1.1:1.0/0003:0484:5750.0001/input/input1
[    2.181018] hid-generic 0003:0484:5750.0001: input,hiddev0,hidraw0: USB HID v1.11 Device [STMicroelectronics 7H Custom Human interface] on usb-musb-hdrc.1-1.1.1/input0
[    2.314814] usb 1-1.1.2: new low-speed USB device number 6 using musb-hdrc
[    2.471028] usb 1-1.1.2: New USB device found, idVendor=062a, idProduct=0003, bcdDevice= 0.00
[    2.471041] usb 1-1.1.2: New USB device strings: Mfr=1, Product=2, SerialNumber=0
[    2.471048] usb 1-1.1.2: Product: Optical Mouse
[    2.471054] usb 1-1.1.2: Manufacturer: MosArt
[    2.476924] input: MosArt Optical Mouse as /devices/platform/ocp/47400000.usb/47401c00.usb/musb-hdrc.1/usb1/1-1/1-1.1/1-1.1.2/1-1.1.2:1.0/0003:062A:0003.0002/input/input3
[    2.477199] hid-generic 0003:062A:0003.0002: input,hidraw1: USB HID v1.10 Mouse [MosArt Optical Mouse] on usb-musb-hdrc.1-1.1.2/input0
[    2.517300] EXT4-fs (mmcblk0p1): orphan cleanup on readonly fs
[    2.517870] EXT4-fs (mmcblk0p1): 3 orphan inodes deleted
[    2.517879] EXT4-fs (mmcblk0p1): recovery complete
[    2.541709] EXT4-fs (mmcblk0p1): mounted filesystem with ordered data mode. Opts: (null)
[    2.541798] VFS: Mounted root (ext4 filesystem) readonly on device 179:1.
[    2.550580] devtmpfs: mounted
[    2.554650] Freeing unused kernel memory: 1024K
[    2.555189] Run /sbin/init as init process
[    2.610868] usb 1-1.1.4: new low-speed USB device number 7 using musb-hdrc
[    2.768461] usb 1-1.1.4: New USB device found, idVendor=046d, idProduct=c31c, bcdDevice=64.01
[    2.768476] usb 1-1.1.4: New USB device strings: Mfr=1, Product=2, SerialNumber=0
[    2.768483] usb 1-1.1.4: Product: USB Keyboard
[    2.768490] usb 1-1.1.4: Manufacturer: Logitech
[    2.777623] input: Logitech USB Keyboard as /devices/platform/ocp/47400000.usb/47401c00.usb/musb-hdrc.1/usb1/1-1/1-1.1/1-1.1.4/1-1.1.4:1.0/0003:046D:C31C.0003/input/input4
[    2.835754] hid-generic 0003:046D:C31C.0003: input,hidraw2: USB HID v1.10 Keyboard [Logitech USB Keyboard] on usb-musb-hdrc.1-1.1.4/input0
[    2.846010] input: Logitech USB Keyboard Consumer Control as /devices/platform/ocp/47400000.usb/47401c00.usb/musb-hdrc.1/usb1/1-1/1-1.1/1-1.1.4/1-1.1.4:1.1/0003:046D:C31C.0004/input/input5
[    2.900213] systemd[1]: System time before build time, advancing clock.
[    2.903096] input: Logitech USB Keyboard System Control as /devices/platform/ocp/47400000.usb/47401c00.usb/musb-hdrc.1/usb1/1-1/1-1.1/1-1.1.4/1-1.1.4:1.1/0003:046D:C31C.0004/input/input6
[    2.903390] hid-generic 0003:046D:C31C.0004: input,hidraw3: USB HID v1.10 Device [Logitech USB Keyboard] on usb-musb-hdrc.1-1.1.4/input1
[    3.011237] random: systemd: uninitialized urandom read (16 bytes read)
[    3.014345] random: systemd: uninitialized urandom read (16 bytes read)
[    3.025829] systemd[1]: systemd 232 running in system mode. (+PAM +AUDIT +SELINUX +IMA +APPARMOR +SMACK +SYSVINIT +UTMP +LIBCRYPTSETUP +GCRYPT +GNUTLS +ACL +XZ +LZ4 +SECCOMP +BLKID +ELFUTILS +KMOD +IDN)
[    3.026505] systemd[1]: Detected architecture arm.
[    3.029990] systemd[1]: Set hostname to <arm>.
[    3.222100] random: systemd-gpt-aut: uninitialized urandom read (16 bytes read)
[    3.626490] systemd[1]: Started Dispatch Password Requests to Console Directory Watch.
[    3.627140] systemd[1]: Reached target Swap.
[    3.627310] systemd[1]: Reached target Remote File Systems.
[    3.627761] systemd[1]: Listening on Syslog Socket.
[    3.628260] systemd[1]: Listening on /dev/initctl Compatibility Named Pipe.
[    3.629877] systemd[1]: Set up automount Arbitrary Executable File Formats File System Automount Point.
[    3.630380] systemd[1]: Listening on udev Control Socket.
[    4.278983] EXT4-fs (mmcblk0p1): re-mounted. Opts: errors=remount-ro
[    5.341034] systemd-journald[153]: Received request to flush runtime journal from PID 1
[    8.905679] Bluetooth: Core ver 2.22
[    8.905821] NET: Registered protocol family 31
[    8.905828] Bluetooth: HCI device and connection manager initialized
[    8.905858] Bluetooth: HCI socket layer initialized
[    8.905871] Bluetooth: L2CAP socket layer initialized
[    8.905929] Bluetooth: SCO socket layer initialized
[    9.519225] net eth0: initializing cpsw version 1.12 (0)
[    9.592187] SMSC LAN8710/LAN8720 4a101000.mdio:00: attached PHY driver [SMSC LAN8710/LAN8720] (mii_bus:phy_addr=4a101000.mdio:00, irq=POLL)
[    9.624194] IPv6: ADDRCONF(NETDEV_UP): eth0: link is not ready
[   12.704495] cpsw 4a100000.ethernet eth0: Link is Up - 100Mbps/Full - flow control rx/tx
[   12.704563] IPv6: ADDRCONF(NETDEV_CHANGE): eth0: link becomes ready
[   13.020127] 8021q: 802.1Q VLAN Support v1.8
[   13.020210] 8021q: adding VLAN 0 to HW filter on device eth0
[   16.393822] using random self ethernet address
[   16.393837] using random host ethernet address
[   16.570269] using random self ethernet address
[   16.570283] using random host ethernet address
[   16.921828] usb0: HOST MAC f4:5e:ab:34:78:61
[   16.924184] usb0: MAC f4:5e:ab:34:78:62
[   16.935324] usb1: HOST MAC f4:5e:ab:34:78:64
[   16.935704] usb1: MAC f4:5e:ab:34:78:65
[   17.145025] NET: Registered protocol family 3
[   17.256855] NET: Registered protocol family 5
[   17.741225] IPv6: ADDRCONF(NETDEV_UP): usb1: link is not ready
[   24.794612] input: STMicroelectronics 7H Custom Human interface as /devices/platform/ocp/47400000.usb/47401c00.usb/musb-hdrc.1/usb1/1-1/1-1.1/1-1.1.1/1-1.1.1:1.0/0003:0484:5750.0001/input/input7
[   24.811336] hid-multitouch 0003:0484:5750.0001: input,hiddev0,hidraw0: USB HID v1.11 Device [STMicroelectronics 7H Custom Human interface] on usb-musb-hdrc.1-1.1.1/input0
[   66.281326] EXT4-fs (mmcblk1p1): recovery complete
[   66.284728] EXT4-fs (mmcblk1p1): mounted filesystem with ordered data mode. Opts: errors=remount-ro
[  145.541522] random: crng init done
[  145.541541] random: 7 urandom warning(s) missed due to ratelimiting
debian@arm:~$

Please let me how to make the screen always on.

[RobertCNelson]

Try disabling dpms mode and screen blanking, with the xset utility from ; ( sudo apt install x11-xserver-utils )

xset -dpms
xset s off

If you have a ~/.xsessionrc file just add them

echo "xset -dpms" >> ~/.xsessionrc
echo "xset s off" >> ~/.xsessionrc

Regards,