<html> <head> <base href="https://bugs.freedesktop.org/"> </head> <body> <div> <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#c21">Comment # 21</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 <a class="email" href="mailto:clinton.a.taylor@intel.com" title="Clinton Taylor <clinton.a.taylor@intel.com>"> Clinton Taylor</a> <pre>(In reply to Chris Wilson from <a href="show_bug.cgi?id=105720#c20">comment #20</a>) > Based on Martin's AccelMethod=none logs, we found this: > > commit 7418d53c589719f71154c5ec58a2b7c486020587 (HEAD, upstream/master) > Author: Chris Wilson <<a href="mailto:chris@chris-wilson.co.uk">chris@chris-wilson.co.uk</a>> > Date: Wed Mar 28 19:38:51 2018 +0100 > > sna/dri2: Clip application of damage to windowed swapbuffers > > Since forever we have been passing region=NULL when doing a windowed > swapbuffer on vblank, and using that to mark the entire pixmap as being > damaged. For an uncomposited window, this is incorrect as it points to a > clipped region of the ScreenPixmap and so we were marking the entire > ScreenPixmap as being flushed, but only having operated on the windowed > region. Instead pass along the clip extents if region is unset. > > References: <a class="bz_bug_link bz_status_NEW " title="NEW - screen corruption using SNA and TearFree on Intel GeminiLake" href="show_bug.cgi?id=105720">https://bugs.freedesktop.org/show_bug.cgi?id=105720</a> > Signed-off-by: Chris Wilson <<a href="mailto:chris@chris-wilson.co.uk">chris@chris-wilson.co.uk</a>> > > It definitely impacts AccelMethod=none and seems to improve AccelMethod=sna > as well, but I haven't been able to explain why. This patch does not fix the issue. Issue is still seen on GLK and BXT platforms. There are times that the original issue is not seen for over an hour.</pre> </div> <hr> You are receiving this mail because: <ul> <li>You are the QA Contact for the bug.</li> </ul> </body> </html>