Re: Flickering XWayland programs after resume from suspend

["Sébastien Lerique" <sl@eauchat.org>]

>> I use SDDM and Sway, and since a couple weeks I experience a 
>> bug where
>> several programs start flickering after I resume from suspend, 
>> to a
>> point that they are unusable. This happens at least on Emacs 
>> and
>> Firefox (I admit I haven't tested on IceCat), happens in both 
>> Sway and
>> Gnome on Wayland, and does not happen in Gnome on X11. Which 
>> makes me
>> think it is related to XWayland.
>
> I'm using sway, and I do not have this issue.  I use Firefox and 
> Emacs.
> I've been running sway for days at a time.  At night I close the 
> laptop
> lip, and I keep computing for the next day.

>> On Emacs, some select letters (often 'o') are not rendered. 
>> Parts of
>> the windows are not refreshed when other parts are updated. 
>> Logging
>> out (to SDDM) and back in fixes the issue.
>
> I do not have this issue.
>

Thanks for the report. It turns out this happens also on Gnome on 
X11, and on Waybar sometimes, so it's not an XWayland issue. Here 
are two videos of some of the behaviour (this is after a full 
update of system and profile): 
https://cloud.eauchat.org/s/T82QzNfSYHnbN6F

$ guix describe
Generation 70	Feb 28 2021 22:09:23	(current)
  nonguix d28a3d8
    repository URL: https://gitlab.com/nonguix/nonguix
    branch: master
    commit: d28a3d8ae7c2f1bbf5887d8b619fedbf3c40e05c
  guix-science ffbe295
    repository URL: 
    https://github.com/guix-science/guix-science.git
    branch: master
    commit: ffbe29563147570d6bcb55cce756fe9742aa204e
  guix 372b15f
    repository URL: https://git.savannah.gnu.org/git/guix.git
    branch: master
    commit: 372b15f8625e7f20cafdba2677d4bf3f5eccc127

$ guix system describe
Generation 135	Mar 01 2021 07:43:31	(current)
  file name: /var/guix/profiles/system-135-link
  canonical file name: 
  /gnu/store/pd0iqgi6mg3lk3pmc4lf5bc0l6a4vs1d-system
  label: GNU with Linux 5.10.18
  bootloader: grub-efi
  root device: /dev/mapper/cryptroot
  kernel: 
  /gnu/store/ff06m580x65x2xhl0sc3aawpf8g9m7b8-linux-5.10.18/bzImage
  channels:
    nonguix:
      repository URL: https://gitlab.com/nonguix/nonguix
      branch: master
      commit: d28a3d8ae7c2f1bbf5887d8b619fedbf3c40e05c
    guix-science:
      repository URL: 
      https://github.com/guix-science/guix-science.git
      branch: master
      commit: ffbe29563147570d6bcb55cce756fe9742aa204e
    guix:
      repository URL: https://git.savannah.gnu.org/git/guix.git
      branch: master
      commit: 372b15f8625e7f20cafdba2677d4bf3f5eccc127
  configuration file: 
  /gnu/store/spymhbc166529z63pdycxl59nnwlp2d4-configuration.scm

And here are my system and profile configs: 
https://gitlab.com/wehlutyk/guix-config (`config.scm` and 
`sl-manifest.scm`).

I thought it was a hardware issue for a moment, but logging out 
and back in fixes it. Any advice for where to start about this is 
much appreciated!

Best,
Sébastien