radeon (amdgpu) DisplayPort loss of max-resolution on DP monitor (after monitor power saving / idle)
Submitted by Fermulator
Assigned to Default DRI bug account
Link to original bug (#107731)
Description
Created attachment 141328
dmesg output post DP disconnect + reconnect to fix resolution
as an extension of the story from:
after a few kernel/driver upgrades and weeks later, that is no longer reproducible - and is instead replaced by lesser issues still plaguing the monitor connected via display port
$ uname -r
4.17.17-100.fc27.x86_64
noticed that the same monitor (connected via DisplayPort) had mis-match capabilities (wasn't able to go max resolution)
```
$ xrandr
Screen 0: minimum 320 x 200, current 3840 x 1200, maximum 16384 x 16384
DisplayPort-0 connected primary 1920x1080+0+0 (normal left inverted right x axis y axis) 0mm x 0mm
1920x1080 59.95*
1600x1200 59.95
1680x1050 59.95
1280x1024 59.95
1440x900 59.95
1280x800 59.95
1280x720 59.95
1024x768 59.95
800x600 59.95
640x480 59.95
HDMI-A-0 disconnected (normal left inverted right x axis y axis)
DVI-D-0 connected 1920x1200+1920+0 (normal left inverted right x axis y axis) 518mm x 324mm
1920x1200 59.95*+
1920x1080 59.95
1600x1200 60.00
1680x1050 59.95
1280x1024 60.02
1440x900 59.95
1280x960 60.00
1280x800 59.95
1280x720 59.95
1024x768 60.00
800x600 60.32 56.25
640x480 59.94
```
The " 1920x1200 59.95*+" option is missing from the display port monitor.
If I disconnect the DP, and reconnect, it comes back.
```
$ xrandr | grep +
DisplayPort-0 connected primary 1920x1200+0+0 (normal left inverted right x axis y axis) 518mm x 324mm
1920x1200 59.95*+
DVI-D-0 connected 1920x1200+1920+0 (normal left inverted right x axis y axis) 518mm x 324mm
1920x1200 59.95*+
```
---
$ dnf info xorg-x11-drv-amdgpu
Failed to synchronize cache for repo 'mosquito-atom', disabling.
Failed to synchronize cache for repo 'region51-chrome-gnome-shell', disabling.
Failed to synchronize cache for repo 'spacewalk-client', disabling.
Last metadata expiration check: 20 days, 23:02:26 ago on Tue 07 Aug 2018 11:04:16 AM EDT.
Installed Packages
Name : xorg-x11-drv-amdgpu
Version : 18.0.1
Release : 1.fc27
Arch : x86_64
Size : 147 k
Source : xorg-x11-drv-amdgpu-18.0.1-1.fc27.src.rpm
Repo : @System
From repo : updates
Summary : AMD GPU video driver
URL : https://www.x.org/wiki
License : MIT
Description : X.Org X11 AMDGPU driver
$ rpm -qa | egrep "amdgpu|gdm|dri-|xorg-x11-server|gnome-session"
mesa-dri-drivers-17.3.9-1.fc27.x86_64
xorg-x11-server-utils-7.7-23.fc27.x86_64
xorg-x11-drv-amdgpu-18.0.1-1.fc27.x86_64
gnome-session-3.26.1-1.fc27.x86_64
gdm-3.26.2.1-3.fc27.x86_64
gnome-session-xsession-3.26.1-1.fc27.x86_64
xorg-x11-server-Xephyr-1.19.6-7.fc27.x86_64
gnome-session-wayland-session-3.26.1-1.fc27.x86_64
pulseaudio-gdm-hooks-12.2-1.fc27.x86_64
xorg-x11-server-Xorg-1.19.6-7.fc27.x86_64
xorg-x11-server-common-1.19.6-7.fc27.x86_64
xorg-x11-server-Xwayland-1.19.6-7.fc27.x86_64
**Attachment 141328**, "dmesg output post DP disconnect + reconnect to fix resolution":
file_107731.txt