Howto set a modeline for fbdev driver?

Michel Dänzer michel at
Mon Feb 16 07:33:18 PST 2009

On Mon, 2009-02-16 at 15:03 +0100, Hans J. Koch wrote:
> I'm using X on top of fb using xserver-xorg-video-fbdev from latest Debian
> sid. It's some embedded device (armel) and uses an 800x480 TFT with strange
> timings. A framebuffer console works fine, I've got the fb device itself
> setup correctly.
> But if I start X, instead of simply copying the correct values, X insists on
> calculating its own, which don't work (vsync much too short).

It should only do that if your xorg.conf has a SubSection "Display" with
a Modes line. If you don't have that, please provide the full xorg.conf
and corresponding Xorg.0.log.

Earthling Michel Dänzer           |      
Libre software enthusiast         |          Debian, X and DRI developer

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