[nvidia] 175% fractional scaling on X11 results in often unaccessible desktop after suspend / re-login

[Petter Sundlöf]

Having enabled fractional scaling on X11, I have a lot of issues with returning to a hw-suspended session, re-login screen becomes a black rectangle, and windows are being resized and there are black rectangular artifacts and a lot of weird stuff with resizing going on. Sometimes I am able to reach the login screen, but often I have to killall -HUP gnome-shell from the terminal. I will try to attach X logs etc when this happens again.
Which are the most relevant log files to look into?

Ubuntu 19.04, gnome-shell 3.32.0, mutter 3.32.0+git20190410-1ubuntu1, NVIDIA 418.56
Screen at 3840x2160 and 175% scaling
---
ProblemType: Bug
ApportVersion: 2.20.10-0ubuntu27
Architecture: amd64
CurrentDesktop: ubuntu:GNOME
DistroRelease: Ubuntu 19.04
InstallationDate: Installed on 2018-07-04 (310 days ago)
InstallationMedia: Ubuntu 18.04 LTS "Bionic Beaver" - Release amd64 (20180426)
NonfreeKernelModules: nvidia_modeset nvidia
Package: mutter 3.32.0+git20190410-1ubuntu1
PackageArchitecture: amd64
ProcVersionSignature: Ubuntu 5.0.0-13.14-generic 5.0.6
Tags: disco
Uname: Linux 5.0.0-13-generic x86_64
UpgradeStatus: Upgraded to disco on 2019-04-17 (23 days ago)
UserGroups: adm cdrom dip lpadmin plugdev sambashare sudo
_MarkForUpload: True
mtime.conffile..etc.apport.crashdb.conf: 2018-07-13T14:12:17.455274

[Daniel van Vugt (vanvugt)]

Thank you for taking the time to report this bug and helping to make Ubuntu better. This particular bug has already been reported and is a duplicate of bug 1809407, so it is being marked as such. Please look at the other bug report to see if there is any missing information that you can provide, or to see if there is a workaround for the bug. Additionally, any further discussion regarding the bug should occur in the other report. Feel free to continue to report any other bugs you may find.

[Daniel van Vugt (vanvugt)]

Thank you for taking the time to report this bug and helping to make Ubuntu better. Please execute the following command only once, as it will automatically gather debugging information, in a terminal:

  apport-collect 1828358

When reporting bugs in the future please use apport by using 'ubuntu-bug' and the name of the package affected. You can learn more about this functionality at https://wiki.ubuntu.com/ReportingBugs.

[Petter Sundlöf (petter-sundlof)]

apport information

[Petter Sundlöf (petter-sundlof)]

apport information

[Petter Sundlöf (petter-sundlof)]

apport information

[Petter Sundlöf (petter-sundlof)]

apport information

[Petter Sundlöf (petter-sundlof)]

Also affects video playback, switching between fullscreen and windowed mode becomes unusably slow. Playing games (The Long Dark as an example) also results in flickering of a black screen when the volume overlay is shown when changing volume

[Petter Sundlöf (petter-sundlof)]

A similar screen blink (about 1-2 secs interval) also happens at screen
wipe/blackout/timeout whatever it's called. Seems a similar issue; a
"smaller", other dpi ("high resolution") screen is glanced in the flickering

Den mån 20 maj 2019 kl 04:30 skrev Daniel van Vugt <
<email address hidden>>:

> ** Tags added: resume suspend-resume
>
> --
> You received this bug notification because you are subscribed to the bug
> report.
> https://bugs.launchpad.net/bugs/1828358
>
> Title:
> [nvidia] 175% fractional scaling on X11 results in often unaccessible
> desktop after suspend / re-login
>
> Status in mutter package in Ubuntu:
> New
>
> Bug description:
> Having enabled fractional scaling on X11, I have a lot of issues with
> returning to a hw-suspended session, re-login screen becomes a black
> rectangle, and windows are being resized and there are black rectangular
> artifacts and a lot of weird stuff with resizing going on. Sometimes I am
> able to reach the login screen, but often I have to killall -HUP
> gnome-shell from the terminal. I will try to attach X logs etc when this
> happens again.
> Which are the most relevant log files to look into?
>
> Ubuntu 19.04, gnome-shell 3.32.0, mutter 3.32.0+git20190410-1ubuntu1,
> NVIDIA 418.56
> Screen at 3840x2160 and 175% scaling
> ---
> ProblemType: Bug
> ApportVersion: 2.20.10-0ubuntu27
> Architecture: amd64
> CurrentDesktop: ubuntu:GNOME
> DistroRelease: Ubuntu 19.04
> InstallationDate: Installed on 2018-07-04 (310 days ago)
> InstallationMedia: Ubuntu 18.04 LTS "Bionic Beaver" - Release amd64
> (20180426)
> NonfreeKernelModules: nvidia_modeset nvidia
> Package: mutter 3.32.0+git20190410-1ubuntu1
> PackageArchitecture: amd64
> ProcVersionSignature: Ubuntu 5.0.0-13.14-generic 5.0.6
> Tags: disco
> Uname: Linux 5.0.0-13-generic x86_64
> UpgradeStatus: Upgraded to disco on 2019-04-17 (23 days ago)
> UserGroups: adm cdrom dip lpadmin plugdev sambashare sudo
> _MarkForUpload: True
> mtime.conffile..etc.apport.crashdb.conf: 2018-07-13T14:12:17.455274
>
> To manage notifications about this bug go to:
>
> https://bugs.launchpad.net/ubuntu/+source/mutter/+bug/1828358/+subscriptions
>

[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.