Bug 457808

Summary:	App windows become non-interactive after assigning a shortcut in the Shortcuts KCM until you alt+tab away and then back
Product:	[Plasma] kwin	Reporter:	empyreal <empyreal>
Component:	general	Assignee:	KWin default assignee <kwin-bugs-null>
Status:	RESOLVED FIXED
Severity:	normal	CC:	kde, nate, plasma-bugs-null
Priority:	NOR
Version First Reported In:	5.25.4
Target Milestone:	---
Platform:	Kubuntu
OS:	Linux
Latest Commit:		Version Fixed/Implemented In:
Sentry Crash Report:

Description empyreal 2022-08-12 15:59:24 UTC

SUMMARY
Adding shortcuts do not work properly. Some sort of freeze happens.

STEPS TO REPRODUCE
1. Press Meta and find Shortcuts.
2. Choose Media Controller or any application.
3. Add Shortcut.
4. Try immediately close shortcut and add new one or choose another application to add shortcut or press Apply.
5. Nothing happens.
6. Press Alt + Tab, press Alt + Tab.
7. Now shortcut can be closed, Apply can be pressed, etc.

OBSERVED RESULT
After adding shortcut it's impossible to immediately add another one without window change.

EXPECTED RESULT
Normal adding of shortcuts without glitches.

SOFTWARE/OS VERSIONS
Operating System: Kubuntu 22.10
KDE Plasma Version: 5.25.4
KDE Frameworks Version: 5.96.0
Qt Version: 5.15.4
Kernel Version: 5.15.0-46-generic (64-bit)
Graphics Platform: X11

Comment 1 Nate Graham 2022-08-12 19:41:46 UTC

Cannot reproduce on Wayland with current git master.

I wonder if this is graphics-related... what kind of GPU do you have?

Comment 2 empyreal 2022-08-12 20:08:56 UTC

GPU 0: NVIDIA GeForce GTX 1660 

Fri Aug 12 23:00:10 2022       
+-----------------------------------------------------------------------------+
| NVIDIA-SMI 470.141.03   Driver Version: 470.141.03   CUDA Version: 11.4     |
|-------------------------------+----------------------+----------------------+
| GPU  Name        Persistence-M| Bus-Id        Disp.A | Volatile Uncorr. ECC |
| Fan  Temp  Perf  Pwr:Usage/Cap|         Memory-Usage | GPU-Util  Compute M. |
|                               |                      |               MIG M. |
|===============================+======================+======================|
|   0  NVIDIA GeForce ...  Off  | 00000000:26:00.0  On |                  N/A |
|  0%   54C    P8    11W / 130W |    643MiB /  5941MiB |      3%      Default |
|                               |                      |                  N/A |
+-------------------------------+----------------------+----------------------+
                                                                               
+-----------------------------------------------------------------------------+
| Processes:                                                                  |
|  GPU   GI   CI        PID   Type   Process name                  GPU Memory |
|        ID   ID                                                   Usage      |
|=============================================================================|
|    0   N/A  N/A      1048      G   /usr/lib/xorg/Xorg                255MiB |
|    0   N/A  N/A      1427      G   /usr/bin/kwin_x11                 117MiB |
|    0   N/A  N/A      1439      G   /usr/bin/plasmashell               24MiB |
|    0   N/A  N/A      1601      G   ...0/usr/lib/firefox/firefox      144MiB |
|    0   N/A  N/A      2819      G   /usr/bin/krusader                   2MiB |
|    0   N/A  N/A      3855      G   ...614955622692011857,131072       93MiB |

Comment 3 empyreal 2022-08-14 11:21:07 UTC

Could this problems be connected somehow with https://bugs.kde.org/show_bug.cgi?id=153915
Same "solution" in both cases: Alt + Tab - window change.

Comment 4 Nate Graham 2022-08-15 16:28:33 UTC

Can you make this freeze happen on any other pages in System Settings?

Comment 5 empyreal 2022-08-15 21:58:56 UTC

It is not freeze. It seems like freeze of shortcuts window. This bug happens even in Amarok and Krusader. Alt + Tab and you unfrozen, assign another shortcut, again Alt + Tab and so on.

Comment 6 Nate Graham 2022-08-17 15:49:15 UTC

Does the issue go away if you disable compositing with Alt+Shift+F12?

(You can use that to turn it on again after you've tested it)

Comment 7 Bug Janitor Service 2022-09-01 04:36:23 UTC

Dear Bug Submitter,

This bug has been in NEEDSINFO status with no change for at least
15 days. Please provide the requested information as soon as
possible and set the bug status as REPORTED. Due to regular bug
tracker maintenance, if the bug is still in NEEDSINFO status with
no change in 30 days the bug will be closed as RESOLVED > WORKSFORME
due to lack of needed information.

For more information about our bug triaging procedures please read the
wiki located here:
https://community.kde.org/Guidelines_and_HOWTOs/Bug_triaging

If you have already provided the requested information, please
mark the bug as REPORTED so that the KDE team knows that the bug is
ready to be confirmed.

Thank you for helping us make KDE software even better for everyone!

Comment 8 empyreal 2022-09-01 09:24:40 UTC

Disabling compositing do not help.  Something blocks all available "buttons" on window after adding shortcut. Only after Alt + Tab everything becomes active.

Comment 9 empyreal 2022-09-24 12:54:11 UTC

Problem solved after fresh Kubuntu 22.10 install.