Hi @jafet.salgado that’s expected…
Ubuntu never patched their 12.04 pre-installed desktop for the PandaBoard ES Rev B3.
I would say to contact them directly, but support for that image is long gone…
Feel free to use the ‘open-source’ side of the Panda: Debian: Getting Started with the PandaBoard
The patch i include here, includes a timing fix, that works on the ES Rev B3 and older devices…
-#define CONFIG_SYS_EMIF_PRECALCULATED_TIMING_REGS
+/* Comment out next line for ES Rev B3 or A4 with new "M" Micron memory... */
+/* #define CONFIG_SYS_EMIF_PRECALCULATED_TIMING_REGS */
it works much better then SVTronic’s app note…
Regards,