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<b><a class="bz_bug_link
bz_status_NEW "
title="NEW --- - [uxa 915GM] Characters sometimes have horizontal lines through them (glyph font corruption)"
href="https://bugs.freedesktop.org/show_bug.cgi?id=36326#c83">Comment # 83</a>
on <a class="bz_bug_link
bz_status_NEW "
title="NEW --- - [uxa 915GM] Characters sometimes have horizontal lines through them (glyph font corruption)"
href="https://bugs.freedesktop.org/show_bug.cgi?id=36326">bug 36326</a>
from <span class="vcard"><a class="email" href="mailto:paulepanter@users.sourceforge.net" title="Paul Menzel <paulepanter@users.sourceforge.net>"> <span class="fn">Paul Menzel</span></a>
</span></b>
<pre>(In reply to <a href="show_bug.cgi?id=36326#c82">comment #82</a>)
<span class="quote">> (In reply to <a href="show_bug.cgi?id=36326#c81">comment #81</a>)
> > and applied the following patch on top of it.
> >
> > commit f49c3cacd25ffb78ccfff49b001ba89375044145
> > Author: Chris Wilson <<a href="mailto:chris@chris-wilson.co.uk">chris@chris-wilson.co.uk</a>>
> > 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.
>
> What I realised later was that Sitosfe was hitting the bug in libdrm-intel
> that was causing it to fallback to swrast. After applying that patch, you
> also need libdrm-intel-2.4.41 or just
> <a href="http://cgit.freedesktop.org/mesa/drm/commit/">http://cgit.freedesktop.org/mesa/drm/commit/</a>
> ?id=fdda97007b1dbf95beb16a0e3510fd36c89e8c33
>
> Paul, can you update libdrm and see if the bug returns?</span >
I applied the commit you mentioned on top of
libdrm (2.4.40-1~deb7u2) sid; urgency=low
and rebuilt the package. Unfortunately I think there is no difference. The
glyph corruption is still gone but it is also still slow, so swrast still might
be used.
How can I check, what is used, without `glxinfo` installed? I could not spot
anything useful in `/var/log/Xorg.0.log`.</pre>
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