[Bug 39282] radeon HD6790 (barts) card produces black+white horizontal stripes on screen when launching Xorg

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=39282

--- Comment #34 from Florian Evers <florian-evers at gmx.de> 2011-12-08 10:40:41 PST ---
Hmm, this is weird. After sucessfully installing Gnome 3.2, I made these
observations:

Now I do not "see" the mouse cursor anymore. The mouse cursor is "just
invisible", but it is still there. But it is not rendered anymore, not in kdm,
and not in gdm. If I start X via "startx" as root (then twm is used), I see a
mouse cursor, but it is corrupted. If I log into KDE/Gnome by using kdm or gdm,
and I move the invisible mouse around, I see some animations happening on the
screen.

Unfortunately, there are still lots of glitches in KDE as well as in Gnome 3.2.
I see lots of artifacts. Even in twm (plain startx) things are not rendered
100% correctly. However, if I look at KDE now, things seem to be worse than a
few hours ago before I installed Gnome and before I lost my mouse cursor. Any
idea whats going on here?

I'm really confused because I do not see the point why or when the mouse cursor
disappeared. I still do not use a xorg.conf, the kernel is the same, and the
kernel command line is the same. I remember that installing gnome required some
changes regarding the use-flags of my Gentoo-based box, but if I look at the
list of installed and reinstalled packets I do not see a candidate for this
behavior.

Fiddeling with the HWCursor-Option in a xorg.conf didn't work either.

I'm using the newest mesa, libdrm and xf86-video-ati.

Any ideas?
Florian

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