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Setting the screen resolution in Ubuntu

Question asked by Andrew Ellis on Mar 13, 2013
Latest reply on Apr 26, 2013 by Guillermo Michel Jimenez
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Hi

 

I have installed ubuntu onto my SabreSD evaluation board. In the command line parameters I specify that the monitor I'm using is 1280x1024, but when Ubuntu boots the screen is stuck at 640x480, there's nothing I can do to change it. The settings program does not allow me to change the resolution, I've tried using xrandr -addmode mxcfb0 1280x1024 and used hdmi instead of mxcfb0 but had no success, I just got a message saying it could not find the output specified.

 

The command line I specify in the uboot environment is 

 

setenv bootargs_mmc setenv bootargs ${bootargs} root=/dev/mmcblk0p1 rootwait rw video=mxcfb0:dev=hdmi,1280x1024M@60,if=RGB24 video=mxcfb1:off video=mxcfb2:off fbmem=28M ip=dhcp

 

I have used the monitor on another system at 1280x1024 so I know it should work.


What do I need to do to change the screen resolution in ubuntu?


Incidently I have the same issue when running Android as supplied with the kit.


Kind regards

 

Andrew

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