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 Force Display Resolution in Ubuntu 9.10 
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Joined: Wed Nov 25, 2009 11:26 am
Posts: 29
Post Force Display Resolution in Ubuntu 9.10
I'm trying to force my machine to boot in 1360x768 every time, even when there's no monitor attached or turned on. I've added GRUB_GFXMODE=1360x768 to /etc/default/grub and ran sudo update-grub

I've also made sure that /etc/X11/xorg.conf has Modes "1360x768" as the only mode line in the Section "Screen" area.

However, if I boot up with the monitor turned off or unplugged it boots up in 1920x1200

Can anyone tell me how to force Ubuntu 9.10 to boot up in a specified resolution regardless of what monitor is attached or not.


Tue Sep 21, 2010 4:29 pm
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Joined: Thu Jul 22, 2010 2:02 pm
Posts: 162
Post Re: Force Display Resolution in Ubuntu 9.10
Actually, I don't have any helpful tipps or even a solution. However, could that be related to the fact, that gma500 disables itself when there is no display present? This behavior kicks in even if a display is connected, but not powered. At least this is, what the specs tell :)


Thu Sep 23, 2010 7:42 am
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Joined: Wed Nov 25, 2009 11:26 am
Posts: 29
Post Re: Force Display Resolution in Ubuntu 9.10
That's odd. The XP IEGD driver will boot into a specified resolution even when not connected to a powered display.


Thu Sep 23, 2010 8:52 pm
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Joined: Thu Jul 22, 2010 2:02 pm
Posts: 162
Post Re: Force Display Resolution in Ubuntu 9.10
Well, I was just guessing. Does the xorg.log (or the error log?) provide any information?

--edit--

GRUB_GFXMODE can only use with vesa modes by the vesa bios extension. You can check available modes using vbeinfo in the grub command line (press c in grub menu). On my fitpc2 this gives me the following modes: 1600x1200 1280x1024 1024x768 800x600 640x480

However, this should in no way be related to your actual X resolution. Could you please post your xorg.log? You might try to use 1024x768 which are more common dimension. If this works, but your one not, you might want to set up an xorg.conf using 1920x1600 with a smaller virtual screen inside.


Thu Sep 23, 2010 10:59 pm
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