[amdgpu] Wayland sessions detect 4K screens (3840x2160) as only 1280x800.

[Miroslav Spehar]

i have 2 monitor setup, both are hidpi monitors:
when 1 monitor (either one) is connected to the pc, resolution of the monitor is properly recognized.
when 2 monitors are connected, maximum of 1200x800 is recognized.

ProblemType: Bug
DistroRelease: Ubuntu 19.04
Package: mutter 3.32.0+git20190410-1ubuntu1
ProcVersionSignature: Ubuntu 5.0.0-13.14-generic 5.0.6
Uname: Linux 5.0.0-13-generic x86_64
ApportVersion: 2.20.10-0ubuntu27
Architecture: amd64
CurrentDesktop: ubuntu:GNOME
Date: Thu Apr 25 07:46:32 2019
InstallationDate: Installed on 2019-04-24 (0 days ago)
InstallationMedia: Ubuntu 19.04 "Disco Dingo" - Release amd64 (20190416)
SourcePackage: mutter
UpgradeStatus: No upgrade log present (probably fresh install)

[Daniel van Vugt (vanvugt)]

Please:

1. Run: lspci -k > lspcik.txt
   and send us the file 'lspcik.txt'.

2. Run: strings -f /sys/class/drm/*/edid > edids.txt
   and send us the file 'edids.txt'.

3. Run: dmesg > dmesg.txt
   and send us the file 'dmesg.txt'.

4. Run: journalctl -b0 > journal.txt
   and send us the file 'journal.txt'.

[Daniel van Vugt (vanvugt)]

Please also:

5. Run: xrandr --verbose > xrandr.txt
   and send us the file 'xrandr.txt'.

[Miroslav Spehar (mspehar)]

dmesg.txt

[Miroslav Spehar (mspehar)]

edids.txt

[Miroslav Spehar (mspehar)]

journal.txt

[Miroslav Spehar (mspehar)]

lspci.txt

[Miroslav Spehar (mspehar)]

about xrandr.txt... this happens with wayland session (the bug is tagged properly i think)
honestly, i didnt try the xorg session... so the file is empty

root@r7:/home/mspehar# xrandr --verbose > xrandr.txt
No protocol specified
Can't open display :0

[Daniel van Vugt (vanvugt)]

Please run that as yourself in a regular desktop terminal window:

  xrandr --verbose > xrandr.txt

[Daniel van Vugt (vanvugt)]

And ideally run it in a Xorg session.

[Miroslav Spehar (mspehar)]

xrandr-xorg.txt

[Miroslav Spehar (mspehar)]

xrandr-wayland.txt

[Daniel van Vugt (vanvugt)]

Thanks!

It looks like the problem is indeed confined to Wayland sessions, if it is a problem at all.

If you have display scaling set to a value of around 300% then a reported desktop resolution of 1280xSomething is expected and not a bug.

In a Wayland session, please open [Settings > Devices > Screen Display] and take a screenshot of that window. Then attach it here.

[Miroslav Spehar (mspehar)]

so, wayland started working properly.

steps:
1. fresh ubuntu install
2. 1st login done in wayland -> max resolution wrongly recognized to be rather low (1200x800); scaling is disabled because of that
3. logout
4. login to xorg -> resolution properly recognized; i could set scaling to 200%
5. logout
6. login to wayland -> resolution properly recognized (i.e. physical monitor resoultion can now be seen in the dropdown menu), but default values for resolution (1200x800) and refresh rate (30) wrongly set; only one monitor (secondary) was usable because the primary was having wrong refresh rate -> when i set refresh rate to 60, primary monitor started to work again.

[Daniel van Vugt (vanvugt)]

OK, so this is a real bug...

Next please report the bug to the GNOME developers here:

  https://gitlab.gnome.org/GNOME/mutter/issues

and then tell us the new bug ID.

[Miroslav Spehar (mspehar)]

Done.

#574

https://gitlab.gnome.org/GNOME/mutter/issues/574

[Daniel van Vugt (vanvugt)]

"Long story short - i cannot reproduce it:

Fedora booted properly
I reinstalled ubuntu and it this time it worked fine"

https://gitlab.gnome.org/GNOME/mutter/issues/574

[Daniel van Vugt (vanvugt)]

Please let us know if and when you can reproduce the bug. Otherwise it will automatically close in 60 days.

[Miroslav Spehar (mspehar)]

I managed to reproduce it on archlinux + kde. Not sure if this would help, but i can provide outputs from arch.

[Miroslav Spehar (mspehar)]

since it can be reproduced in certain scenarios with ubuntu, kubuntu and arch, is there some output that i should provide to try to track driver issues?

new situation:
- booted ubuntu iso
- resolution were wrong (aka small)
- due to inactivity screen was turned off
- when i reactivated the screen, resolution was recognized correctly

unfortunatelly, turning off the pc and rebooting does not play a role now. i managed to "break" it by installing archlinux. next boot showed problems with graphic card as described.

[Daniel van Vugt (vanvugt)]

Thank you for reporting this bug to Ubuntu.
Ubuntu 19.04 (disco) reached end-of-life on January 23, 2020.

See this document for currently supported Ubuntu releases:
https://wiki.ubuntu.com/Releases

We appreciate that this bug may be old and you might not be interested in discussing it any more. But if you are then please upgrade to the latest Ubuntu version and re-test. If you then find the bug is still present in the newer Ubuntu version, please add a comment here telling us which new version it is in and change the bug status to Confirmed.

[Daniel van Vugt (vanvugt)]

The upstream bug was never fixed, just closed. So removing the task...

https://gitlab.gnome.org/GNOME/mutter/issues/574