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            <b><a class="bz_bug_link 
          bz_status_NEW "
   title="NEW --- - MESA_META_DRAW_BUFFERS induced GL_INVALID_VALUE errors"
   href="https://bugs.freedesktop.org/show_bug.cgi?id=80115#c2">Comment # 2</a>
              on <a class="bz_bug_link 
          bz_status_NEW "
   title="NEW --- - MESA_META_DRAW_BUFFERS induced GL_INVALID_VALUE errors"
   href="https://bugs.freedesktop.org/show_bug.cgi?id=80115">bug 80115</a>
              from <span class="vcard"><a class="email" href="mailto:luigide@yandex.com" title="luigi <luigide@yandex.com>"> <span class="fn">luigi</span></a>
</span></b>
        <pre>hi.i set environment vars like:

MESA_DEBUG=1  LIBGL_DEBUG=verbose

i cannot see any libgl error in my kwin.log [1]  for mesa-10.2.1

But this was slightly happen to me:

 <a class="bz_bug_link 
          bz_status_NEW "
   title="NEW --- - rendering problems: black areas in KDE desktop. [mesa 10.2.1 (not with 10.1.4)]"
   href="show_bug.cgi?id=80069">https://bugs.freedesktop.org/show_bug.cgi?id=80069</a>

Also its interesting to see this line into xorg.log [2]:

[     5.547] removing GPU device /sys/devices/pci0000:00/0000:00:02.0/drm/card0
/dev/dri/card0
[     5.547] xf86: remove device 0
/sys/devices/pci0000:00/0000:00:02.0/drm/card0
[     5.547] failed to find screen to remove

[1]  <a href="http://pastebin.com/qhRk2DTy">http://pastebin.com/qhRk2DTy</a>
[2]  <a href="http://pastebin.com/ezX04Gzc">http://pastebin.com/ezX04Gzc</a></pre>
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