Comme=
nt # 34
on bug 10962=
8
from Chris Snook
(In reply to Chris Snook from comment #33)
> (In reply to Johannes Hirte from comment #28)
> > 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, ma=
ybe other
> > compositors too.
>=20
> Confirmed that the workaround of switching to the kwin OpenGL 3.1 comp=
ositor
> works for me.
>=20
> 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
>=20
> 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 appea=
ring
in my logs though.