User talk:RobertCNelson

Revision as of 18:12, 19 August 2011 by Gangasrotagati (Talk | contribs) (the "I don't know" method of finding your SD card: new section)

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I installed gnome and added Driver "fbdev" to xorg.conf. How do I change the screen resolution. It is at only 800x640.

Mike Westfield


Hi Rob,

I just added some hints and discussion on Upgrade_X-loader_and_U-boot

Since this is related to the content found at git://

I thought you are surely directly involved there. Thanks.

-- Merkel 10:22, 18 May 2011 (UTC)

Setting Video Resolution

It first depends on what kernel version you are using.

You have to define it at boot time, thru u-boot, this would set 1280x720x16 for 2.6.29.

setenv bootargs 'console=ttyS2,115200n8 console=tty0 root=/dev/mmcblk0p2 rootwait rootfstype=ext3 ro omapfb.mode=dvi:1280x720MR-16@60'

For 2.6.27/2.6.27:


For 2.6.28:

omap-dss.def_disp=lcd omapfb.video_mode=1280x720MR-16@60 

For 2.6.29:


Common Modes: (not every combination is supported)


Main doc is here:;a=blob;f=Documentation/fb/modedb.txt;h=ec4dee75a35450376ad13442ea926eaf76de76aa;hb=HEAD

--RobertCNelson 19:30, 11 May 2009 (UTC)

the "I don't know" method of finding your SD card

When I use your method of running sudo ./ --mmc /dev/idontknow on my Maverick Meerkat Ubuntu machine, I simply get get

administrator@ubuntu:~/desk$ sudo ./ --mmc  /dev/idontknow
[sudo] password for administrator: 
sudo: ./ command not found


Are you sure? I Don't see [/dev/idontknow], here is what I do see..

as you said. What kind of machine are you using?

Anyways df -h, (while more boring! :), works for me. Why did you change the page to use this new method? I strongly suspect that using df -h to list the amount of free space on each disk (and hence where they each are) would have a more universal result on more types of Linux machines than using sudo ./ --mmc /dev/idontknow. Would you mind if I reverted it back to the method I originally put?