Highligting text in firefox causes firefox to crash Qtile only

The issue:

• Linux arch linux 5.18.1-arch1-1
• Qtile --version 0.21.0 (installed via pacman -S qtile

The firefox version doesn’t matter, and it’s affecting thunderbird, firefox and firefox-developer-edition.

I have confirmed that it’s qtile since I cannot replicate the bug on the same system with dwm.

I have tried on two systems, with the second one being a fresh install.

The crash causes no qtile logs.

Required:

• I have searched past issues to see if this bug has already been reported.

[Malex]

1. XLIB_SKIP_ARGB_VISUALS

That variable is related to an extension (Composite) which is usually not on by default (at least according to X11 documentation). Try xdpyinfo | grep -i composite to check if you have it. The variable seems to be some kind of quirk they added to let some apps work, but reading the doc it doesnt seem something you should use in your profile (if you needed it for teams, the better way would have been to override the variable just for the teams invocation, not for the whole environment): https://www.x.org/archive/X11R6.8.0/doc/RELNOTES5.html

If an application fails only when the Composite is enabled, try setting this environment variable before starting the application.

[nymann]

I successfully debugged the issue @elParaguayo :

As part of my .zprofile i do:

# Get cam to work in Microsoft Teams
export XLIB_SKIP_ARGB_VISUALS=1

When I comment that out, the crash no longer appears, mind you that it’s only crashing in Qtile and not DWM.

So steps to reproduce:

1. add export XLIB_SKIP_ARGB_VISUALS=1 to your profile.
2. reboot
3. launch firefox
4. highlight any text

Note that I don’t personally need XLIB_SKIP_ARGB_VISUALS anymore since I now just run Teams from the browser, so I have just deleted it from my profile. But might be a good idea to fix the underlying issue for others 😛