User talk:RobertCNelson

Revision as of 19:16, 19 August 2011 by Gangasrotagati (talk | contribs) (the "I don't know" method of finding your SD card)
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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

Here is me attempting to use your method for finding your SD card on my Maverick Meerkat Ubuntu machine:

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 would happen. What OS/version do you run in which this works?

Anyways df -h, (while provoking an admittedly less charming response from the computer!), 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 had originally put?