[Bug 32316] Severe glitches with KMS + external monitor

bugzilla-daemon at freedesktop.org bugzilla-daemon at freedesktop.org
Fri Dec 17 04:07:15 PST 2010


--- Comment #9 from tim.holy at gmail.com 2010-12-17 04:07:15 PST ---
(In reply to comment #8)
> Can you try booting with radeon.disp_priority=2 on your kernel command line? 

By itself, this did not help.

> Also try adding:
> Option "ColorTiling" False"
> to the device section of your xorg.conf

I tried this on its own, in combination with the disp_priority=2, and even
tossed in new_pll=0 as well for good measure. None of these fixed the problem.

There is one point that I should perhaps amplify: when I boot with the external
monitor attached, X comes up in 1024x768 mode. Even in KMS, it works fine at
this resolution. The glitches only start when I try to change to a higher
resolution (LVDS 1400x1050, VGA 1920x1080). I have not tried many different
higher-resolution settings, just these.

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