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<b><a class="bz_bug_link
bz_status_NEW "
title="NEW - screen corruption using SNA and TearFree on Intel GeminiLake"
href="https://bugs.freedesktop.org/show_bug.cgi?id=105720#c15">Comment # 15</a>
on <a class="bz_bug_link
bz_status_NEW "
title="NEW - screen corruption using SNA and TearFree on Intel GeminiLake"
href="https://bugs.freedesktop.org/show_bug.cgi?id=105720">bug 105720</a>
from <span class="vcard"><a class="email" href="mailto:clinton.a.taylor@intel.com" title="Clinton Taylor <clinton.a.taylor@intel.com>"> <span class="fn">Clinton Taylor</span></a>
</span></b>
<pre>(In reply to Chris Wilson from <a href="show_bug.cgi?id=105720#c13">comment #13</a>)
<span class="quote">> So far:
>
> - observed it in TearFree
>
> - not observed it in NoTearFree
>
> - we've nullified damage tracking for TearFree, forcing it to copy every
> frame,
> still reproduces (probably sensible to check through the debug logs for this
> one to verify the copy to a fresh bo)
>
> - used PerCrtcPixmaps + TearFree, reproduced
>
> - used PerCrtcPixmaps + NoTearFree + attached patch (c12), reproduced</span >
Haven't been able to reproduce with this configuration again. However the last
reproduction took over 20 minutes. Will continue testing.
<span class="quote">>
> (Please double check the above, and make sure the log file reports using
> PerCrtcPixmap/TearFree etc.)</span >
Confirmed in logs that the Options are being used correctly.
<span class="quote">>
> So everything above that involves a pageflip (the ratelimit patch includes a
> pageflip to itself for timing purposes) has reproduced the _persistent_ dirt.
>
> Left to verify,
>
> - PerCrtcPixmaps + NoTearFree (not using attached patch)</span >
Issue not seen. Rendering appears to be in order and double buffered with the
extra crtc pixmap. Need to run this config more to validate.
<span class="quote">>
> - Forcing a full CRTC copy with PerCrtcPixmaps + NoTearFree (requires
> another hack)
>
> Other things to test (if it is pageflip related), fullscreen DRI2/DRI3
> applications (needs to watch HW or logs to confirm pageflips).</span ></pre>
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