Bug 2310864

Created attachment 2045965 [details]
Video showing gnome-software not starting

This video shows the error messages or warnings appearing in the terminal when trying to start gnome-software.

Created attachment 2045966 [details]
Screenshot showing the error messages/warnings in the terminal

Attaching with gdb shows this:

```
gdb --pid=3663
...
Downloading separate debug info for system-supplied DSO at 0x7fb52e223000                                                    
[Thread debugging using libthread_db enabled]                                                                                
Using host libthread_db library "/lib64/libthread_db.so.1".
Downloading source file /usr/src/debug/glibc-2.40-3.fc41.x86_64/io/../sysdeps/unix/sysv/linux/ppoll.c
0x00007fb52cd87f70 in __GI_ppoll (fds=fds@entry=0x7fb4d8119180, nfds=nfds@entry=3, timeout=<optimized out>,                  
    timeout@entry=0x7ffc556d1760, sigmask=sigmask@entry=0x0) at ../sysdeps/unix/sysv/linux/ppoll.c:42
42        return SYSCALL_CANCEL (ppoll_time64, fds, nfds, timeout, sigmask,
(gdb) 
```

Thanks fr a bug report. It seems to me the window is there, only not painted properly. Could you try for example a `gtk4-demo` application, whether it'll be affected in a similar way, please?

I faced something similar in GNOME OS, as reported here: https://gitlab.gnome.org/GNOME/gnome-build-meta/-/issues/878 but it was in the GNOME itself. I cannot tell whether the two are related.

Created attachment 2046001 [details]
Screenshot showing that the same problem happens with gtk4-demo

Screenshot showing that the same problem happens with gtk4-demo

Yes, same problem with gtk4-demo.

By the way, if I do `ssh -X` to the virtual machine and try to start gnome-software or gtk4-demo with X forwarding via ssh, then it does not work either, a window opens but no contents are drawn. And the terminal shows this error messages:

mfabian@f41:~$ gtk4-demo
libEGL warning: DRI3: Screen seems not DRI3 capable
libEGL warning: DRI2: failed to authenticate
libEGL warning: DRI3: Screen seems not DRI3 capable
MESA: error: ZINK: failed to choose pdev
libEGL warning: egl: failed to create dri2 screen

**All** Gtk4 applications seem to have this problem, gnome-text-editor as well.

Thanks for the update. I'm moving this to the gtk4 for further investigation.

Could you provide the gtk4 package version you've installed, please?

> Could you provide the gtk4 package version you've installed, please?

mfabian@f41:~$ rpm -q gtk4 
gtk4-4.15.5-3.fc41.x86_64
mfabian@f41:~$ rpm -q gtk4-devel-tools 
gtk4-devel-tools-4.15.5-3.fc41.x86_64
mfabian@f41:~$

Created attachment 2046504 [details]
It  also does not work when using `su -` to become root and then trying to start a gtk4 program

It  also does not work when using `su -` to become root and then trying to start a gtk4 program.

From https://gitlab.gnome.org/GNOME/gtk/-/issues/6840#note_2206428
The following is the workaround.

env GSK_RENDERER=cairo gnome-text-editor

I updated my f41 virtual machine again today.

I can start gtk4 programs on XFCE now, and I can do `ssh -X` to the virtual machine and start a gtk4 program.

But the problem still exists when using `su -` to become root and then trying to start a gtk4 program.

(In reply to Mike FABIAN from comment #13)
> But the problem still exists when using `su -` to become root and then
> trying to start a gtk4 program.

If that's a regression maybe better to open a separate bug for that.

I think the main issue is fixed so it would be reasonable to close this issue already.

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