<html> <head> <base href="https://bugs.freedesktop.org/" /> </head> <body> <div> <a class="bz_bug_link bz_status_NEEDINFO " title="NEEDINFO --- - intel driver shows blank screen when set to UXA only after cold start" href="https://bugs.freedesktop.org/show_bug.cgi?id=69528#c12">Comment # 12</a> on <a class="bz_bug_link bz_status_NEEDINFO " title="NEEDINFO --- - intel driver shows blank screen when set to UXA only after cold start" href="https://bugs.freedesktop.org/show_bug.cgi?id=69528">bug 69528</a> from <a class="email" href="mailto:chris@chris-wilson.co.uk" title="Chris Wilson <chris@chris-wilson.co.uk>"> Chris Wilson</a> <pre>This should fix the corruption in the panel: commit e916c922ce3913712cd8a9b76ab037840b7f07f1 Author: Chris Wilson <<a href="mailto:chris@chris-wilson.co.uk">chris@chris-wilson.co.uk</a>> Date: Thu Jan 23 17:30:29 2014 +0000 sna: Avoid erroneous discarding operations for partial composites Composite operations were presumed to cover their entire width x height area. However, a few paths submit boxes that do not cover the clip region and so the optimisation made during prepare to discard completely overwritten data is incorrect (and leads to corruption - stale data is seen which the client expected to have been overdrawn). So along these more unusual paths, we must add a flag to prevent the overzealous discard. Notably, xfce4 triggers this as it uses a lot of unantialiased trapezoids in its theme drawing. References: <a class="bz_bug_link bz_status_NEEDINFO " title="NEEDINFO --- - intel driver shows blank screen when set to UXA only after cold start" href="show_bug.cgi?id=69528">https://bugs.freedesktop.org/show_bug.cgi?id=69528</a> Signed-off-by: Chris Wilson <<a href="mailto:chris@chris-wilson.co.uk">chris@chris-wilson.co.uk</a>></pre> </div> <hr> You are receiving this mail because: <ul> <li>You are the QA Contact for the bug.</li> <li>You are on the CC list for the bug.</li> <li>You are the assignee for the bug.</li> </ul> </body> </html>