945GM + Xrandr 1.2 + modesetting: color corruption on LVDS

HENRY David tfc_duke at club-internet.fr
Mon Feb 12 23:21:04 PST 2007

Ok, I'll try to rebuild from source if I find some time, or wait for
official distro packages.

thanks !


Le lundi 12 février 2007 à 20:13 -0800, Keith Packard a écrit :
> On Sun, 2007-02-11 at 15:59 +0100, HENRY David wrote:
> > I have a color corruption on my LVDS panel when I run xrandr. The
> > screens looks like if color depth were at 8 bits (I'm running at 24
> > bits). If I switch to another screen mode and come back to my "normal"
> > desktop (like a VT switch, or running Quake 3 fullscreen and exiting,
> > etc.), the problem disappears. As soon as I run xrandr (even just for a
> > query), the colors are degraded again.
> There are several subtle timing-related issues in setting modes on the
> LVDS output. We've tested the current code on many displays and have
> gotten it working well after some tweaking (and, after constant
> reference to the specifications). I don't know what version of the
> driver you're running, but newer is generally better, so please try
> building the current version from the modesetting branch rather than
> relying on pre-built drivers at this point; we haven't made any formal
> releases, so you're just getting Daniel's 'best guess' as to which
> version to ship.
> And, if you do have problems with the latest code, please include as
> much information about the machine you're using as possible. We may be
> able to get access to a matching machine and debug the problem directly.

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