<html> <head> <base href="https://bugs.freedesktop.org/" /> </head> <body> <div> <a class="bz_bug_link bz_status_NEW " title="NEW --- - [Intel G45] Screen turns blank when terminating a low res X server on a different low res KMS mode." href="https://bugs.freedesktop.org/show_bug.cgi?id=61457#c1">Comment # 1</a> on <a class="bz_bug_link bz_status_NEW " title="NEW --- - [Intel G45] Screen turns blank when terminating a low res X server on a different low res KMS mode." href="https://bugs.freedesktop.org/show_bug.cgi?id=61457">bug 61457</a> from <a class="email" href="mailto:eich@pdx.freedesktop.org" title="Egbert Eich <eich@pdx.freedesktop.org>"> Egbert Eich</a> <pre>Created <a href="attachment.cgi?id=75526" name="attach_75526" title="Ugly workaround.">attachment 75526</a> <a href="attachment.cgi?id=75526&action=edit" title="Ugly workaround.">[details]</a> <a href='page.cgi?id=splinter.html&bug=61457&attachment=75526'>[review]</a> Ugly workaround. After a long debugging session I came to the conclusion that this issue was related to the hardware cursor plane being disabled when enabling the display plane. I tried several workarounds, the one attached is the simplest. I would like to put it up for discussion as it contains an ugly and totally not-understood delay which was determined experimentally. It seems that the only way to avoid this problem is to wait for a vblank and then add an delay of about 8-15 milliseconds. It turned out that a shorter or longer delay let the problem reoccur.</pre> </div> <hr> You are receiving this mail because: <ul> <li>You are the QA Contact for the bug.</li> <li>You are the assignee for the bug.</li> </ul> </body> </html>