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<b><a class="bz_bug_link
bz_status_NEW "
title="NEW - [865g 3.16 regression] Desktop image is distorted"
href="https://bugs.freedesktop.org/show_bug.cgi?id=88112#c9">Comment # 9</a>
on <a class="bz_bug_link
bz_status_NEW "
title="NEW - [865g 3.16 regression] Desktop image is distorted"
href="https://bugs.freedesktop.org/show_bug.cgi?id=88112">bug 88112</a>
from <span class="vcard"><a class="email" href="mailto:chris@chris-wilson.co.uk" title="Chris Wilson <chris@chris-wilson.co.uk>"> <span class="fn">Chris Wilson</span></a>
</span></b>
<pre>If I had to guess, I would say that it was the ddx screwing up with userptr.
Slightly quicker than doing a full bisect, if you download xf86-video-intel:
$ sudo apt-get build-dep xserver-xorg-video-intel
$ git clone git://anongit.freedesktop.org/xorg/driver/xf86-video-intel
edit line 71 of src/sna/kgem.c to read:
#define DBG_NO_USERPTR 1
$ ./autogen.sh --prefix=/usr
$ make && sudo make install
And retest.</pre>
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