Hi,
Using Rocky Linux 8.9.
In recent days, some apps in flatpak are no longer working properly (they used to work fine) and do not show their window / GUI properly - eg some of the GUI has black rectangles in it. The GUI does not respond to mouse clicks sometimes. Also they are intermittently taking 100% CPU processing.
An example app that is having this issue is flatseal.
Other apps still function fine, such as shortwave.
Any help much appreciated. Please let me know if I can provide further info.
AMD/INTEL/Nvidia? Do you see anything in the terminal, if you start a flatpak from there.
I would guess it’s a regression in rocky linux - but hard to know without more data.
It would also be valuable to know which runtimes you have tested, if older ones work.
@razzeee
Thanks for the quick reply and your help 
The video card is:
00:02.0 VGA compatible controller: Intel Corporation Core Processor Integrated Graphics Controller (rev 02)
CPU is:
Intel(R) Core™ i5 CPU M 540 @ 2.53GHz
Running in the Terminal:
flatpak run com.github.tchx84.Flatseal
produces the same issues unfortunately.
Please let me know if there is more info I can provide or something I can try.
@tingping - Thank you also for your reply.
I am sorry but I am an end user of flatpak and do not now what it means to test runtimes.
I tried to learn more about what you mean by eg searching for:
flathub install older runtime
and found articles like:
in which the OP does not understand things either
and
Downgrading | Flathub Documentation which seems to be oriented to developers eg using terms like “Then you deploy the commit:” which I have no idea of what this would mean.
I think the most sensible thing you can do as a user is report this to rocky linux and see if they have more reports of this.
I have the same problem and think that the problem is the Gnome 45 runtime. All Installed apps using this runtime are not working.
I just tried Firmware which uses Gnome 45 and that seems fine on my system
I just noticed that flatpak has a “repair” command. Seems like a sensible thing to try. I have ran and it did not complete properly. I am going to make another post about this.
If you start the app from the commandline, what does the commandline say?
Today I updated the Gome 45 runtime and this fixed the problem.
