forwarded 430112 https://bugs.freedesktop.org/show_bug.cgi?id=11339
thank you
Benjamin Wong wrote:
> The minimum pixel clock is hardcoded to 12MHz in the source code.
> However, my Matrox G550 locks up when given a mode with a pixel clock
> less than 16MHz. This is a serious problem because it can happen
> easily and requires a reboot to fix. (Killing the Xserver and starting
> a new one from a serial console does not unwedge the video card.)
>
> [...]
>
> Fortunately, it appears that the fix is simple. The line in the
> mga_driver.c source code which sets the minimum pixel clock to 12MHz
> has a comment next to it saying "XXX Guess, need to check this".
>
> I apologize in advance for not testing this patch out on my own
> machine, but I do not have all the dependencies required to recompile
> an X driver.
>
Thanks for this detailled report. I have forwarded it to the upstream
bugzilla at the URL above. Feel free to add comments there if somebody
replies.
In the meantime, it would be good if you could actually test the patch.
You should be able to get the required dependencies by typing:
apt-get build-dep xserver-xorg-video-mga
Let me know if you need more help.
Brice
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