sakoman.com

Unfortunately the display subsystem in OMAP3 Linux isn't quite as flexible as you might be used to on your desktop system.  Currently the display resolution cannot be easily changed "on the fly", you must set it using an environment variable in u-boot.

Fortunately this is a fairly simple process:

1. Press any key during the boot sequence when u-boot prints the following message:

Hit any key to stop autoboot:

2. Choose one of the following resolutions that are known to work:

• 640x480MR-16@60 (use this one for the Pico Projector)
• 800x600MR-16@60
• 1024x768MR-16@60
• 1280x800MR-16@60
• 1280x1024MR-16@60
• 1440x900MR-16@60
• 1680x1050MR-16@60

3. Set the dvimode environment variable to your desired resolution, save the setting, and start the boot process:

# setenv dvimode 1280x1024MR-16@60
# saveenv
Saving Environment to NAND...
Erasing Nand...
Erasing at 0x240000 -- 100% complete.
Writing to Nand... done
# reset