Re: Flickering XWayland programs after resume from suspend

[Sébastien Lerique]

> > 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