Comment 180 for bug 745608

(In reply to comment #76)
> Sitsofe reports that commit 441ef916ae6569c88b3d6abaf7fea4d69be49d76
> Author: Chris Wilson <email address hidden>
> Date: Thu Jan 10 19:14:21 2013 +0000
>
> intel: Throttle harder
>
> does improve matters, but I'm still at a loss to explain why.

Finally I got some time to test that patch too. I checked out branch `debian-unstable` from the Debian packaging Git repository [1] (based on release 2.19.0)

    commit 8ab872522ae0891b8fb52fbb31db52d581c3efa3
    Author: Julien Cristau <email address hidden>
    Date: Sun Sep 16 20:47:05 2012 +0200

        Upload to unstable

and applied the following patch on top of it.

    commit f49c3cacd25ffb78ccfff49b001ba89375044145
    Author: Chris Wilson <email address hidden>
    Date: Thu Jan 10 19:14:21 2013 +0000

        intel: Throttle harder

Limited testing shows that the glyph corruption is gone. Unfortunately performance seems to be slower too. That means for example maximizing a window it does not happen instantly and I can see how it is redrawn. So basically the same behavior with `"DebugWait" "true"`, if I remember correctly.

[1] http://anonscm.debian.org/gitweb/?p=pkg-xorg/driver/xserver-xorg-video-intel.git;a=summary