[Bug 104531] New: Cannot turn monitor off over DP cable

[b***@freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=104531

Bug ID: 104531
Summary: Cannot turn monitor off over DP cable
Product: xorg
Version: git
Hardware: x86-64 (AMD64)
OS: Linux (All)
Status: NEW
Severity: minor
Priority: low
Component: Driver/AMDgpu
Assignee: xorg-driver-***@lists.x.org
Reporter: ***@slonko.net
QA Contact: xorg-***@lists.x.org

Created attachment 136602
--> https://bugs.freedesktop.org/attachment.cgi?id=136602&action=edit
xorg log file (amdgpu over DP cable)

NOTE: This is very similar to Bug #38030.

"sleep 5; xset dpms force off" turns my monitor off, then turns it on again
when using DP cable although works just fine with HDMI cable (monitor
permanently turns off). I have this problem with both radeon and amdgpu
drivers.

card: MSI R9 270 GAMING 2G
xf86-video-amdgpu: latest git
xf86-video-ati: 7.10.0
xorg-server: 1.19.6
kernel: 4.14.11

[b***@freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=104531

--- Comment #1 from Marcin Deranek <***@slonko.net> ---
Created attachment 136603
--> https://bugs.freedesktop.org/attachment.cgi?id=136603&action=edit
dmesg

[b***@freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=104531

--- Comment #2 from Parag <***@gmail.com> ---
This is happening to me with a R7 240 with DP or HDMI cables, with 4 different
monitors - Acer, Dell, 2x Lenovo. No errors in dmesg, just that screen refuses
to stay off after DPMS standby/off - wakes back up instantly.

Tried on Ubuntu 18.04.1 and OpenSUSE Tumbleweed all the way up to latest 4.9.x
kernel with same results.

Any pointers on how to debug this greatly appreciated.

[b***@freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=104531

--- Comment #3 from Alex Deucher <***@gmail.com> ---
(In reply to Parag from comment #2)

Post by b***@freedesktop.org
This is happening to me with a R7 240 with DP or HDMI cables, with 4
different monitors - Acer, Dell, 2x Lenovo. No errors in dmesg, just that
screen refuses to stay off after DPMS standby/off - wakes back up instantly.
Tried on Ubuntu 18.04.1 and OpenSUSE Tumbleweed all the way up to latest
4.9.x kernel with same results.
Any pointers on how to debug this greatly appreciated.

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?

[b***@freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=104531

--- Comment #4 from Marcin Deranek <***@slonko.net> ---
I'm manually turning it off by:

sleep 10; xset dpms force off

My desktop environment (XFCE) nor Xorg server cannot switch it off either.

[b***@freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=104531

Michel DÀnzer <***@daenzer.net> changed:

What |Removed |Added
----------------------------------------------------------------------------
Attachment #136602|text/x-log |text/plain
mime type| |

[b***@freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=104531

Michel DÀnzer <***@daenzer.net> changed:

What |Removed |Added
----------------------------------------------------------------------------
QA Contact|xorg-***@lists.x.org |
Assignee|xorg-driver-***@lists.x.org |dri-***@lists.freedesktop
| |.org
Product|xorg |DRI
Component|Driver/AMDgpu |DRM/AMDgpu
Version|git |unspecified

--- Comment #5 from Michel DÀnzer <***@daenzer.net> ---
I suspect amdgpu_connector_dp_detect might need similar logic as
amdgpu_connector_dvi/vga_detect related to amdgpu_connector->detected_by_load .