Commen=
t # 7
on bug 10453=
1
from Parag
(In reply to Alex Deucher from comment #3)
> (In reply to Parag from comment #2)
> > This is happening to me with a R7 240 with DP or HDMI cables, wit=
h 4
> > different monitors - Acer, Dell, 2x Lenovo. No errors in dmesg, j=
ust that
> > screen refuses to stay off after DPMS standby/off - wakes back up=
instantly.
> >=20
> > Tried on Ubuntu 18.04.1 and OpenSUSE Tumbleweed all the way up to=
latest
> > 4.9.x kernel with same results.
> >=20
> > Any pointers on how to debug this greatly appreciated.
>=20
> Are you manually turning off the displays using xset or something like=
that,
> or are you seeing this behavior when your desktop environment enters a=
dpms
> state?
Correction : this happens to me on RX560 card - R7 240 was the one that wor=
ked
fine. It happens with 1xAcer 1x Dell monitor combo as well 2x Lenovo ones -=
so
monitor brand doesn't seem to matter.
5:00.0 VGA compatible controller: Advanced Micro Devices, Inc. [AMD/ATI] Ba=
ffin
[Radeon RX 460/560D / Pro 450/455/460/555/560] (rev e5)
Also to answer your question it happens when I set it manually using xset d=
pms
force standby for example. But problem also happens when desktop tries to e=
nter
dpms state - tried with various distros/GNOME/KDE with same results - the
monitor fails to go to sleep. The difference being in the first case the sc=
reen
turns black for a second or so, monitor power light is still white and then=
the
screen comes back on.=20
In the second case I either see grey screen with mouse some times and lock
screen in others but I am able to move the mouse and log back in - nothing
seems broken in either case other than the fact that both monitors fail to
sleep.