<html> <head> <base href="https://bugs.freedesktop.org/"> </head> <body> <div> <a class="bz_bug_link bz_status_NEW " title="NEW - WARNING at dcn10_hw_sequencer.c:868 dcn10_verify_allow_pstate_change_high()" href="https://bugs.freedesktop.org/show_bug.cgi?id=109628#c34">Comment # 34</a> on <a class="bz_bug_link bz_status_NEW " title="NEW - WARNING at dcn10_hw_sequencer.c:868 dcn10_verify_allow_pstate_change_high()" href="https://bugs.freedesktop.org/show_bug.cgi?id=109628">bug 109628</a> from <a class="email" href="mailto:chris.snook@gmail.com" title="Chris Snook <chris.snook@gmail.com>"> Chris Snook</a> <pre>(In reply to Chris Snook from <a href="show_bug.cgi?id=109628#c33">comment #33</a>) > (In reply to Johannes Hirte from <a href="show_bug.cgi?id=109628#c28">comment #28</a>) > > From the reports, it seems to be compositor related. For me, kwin with > > OpenGL 3.1 backend works fine. xfwm4 seems to trigger the bug, maybe other > > compositors too. > > Confirmed that the workaround of switching to the kwin OpenGL 3.1 compositor > works for me. > > kernel: 5.3.0-19-generic (Ubuntu 19.10) > window manager: kwin-x11 4:5.16.5-0ubuntu1 > CPU: Ryzen Pro 2500U > machine: Lenovo Thinkpad A485 > X server: xserver-xorg 1:7.7+19ubuntu12 > userspace driver: xserver-xorg-video-amdgpu 19.0.1-1ubuntu1 > > I'm happy to test patches or reproduce. I may have spoken too soon. I'm non-deterministically experiencing the basic symptom of hang on resume with a blank screen, sometimes with the backlight on and sometimes without, but I no longer get the traceback in logs, so I can't tell if it's mostly the same bug but without tripping the failure mode that causes it to log, or if there's an unrelated suspend/resume bug. Switching to the OpenGL 3.1 compositor has definitely made that error message stop appearing in my logs though.</pre> </div> <hr> You are receiving this mail because: <ul> <li>You are the assignee for the bug.</li> </ul> </body> </html>