Bug 450913

Summary: [garuda] - system freezes completely while launching gtk applications
Product: [Unmaintained] lattedock Reporter: Maruthi <kdebugs>
Component: applicationAssignee: Michail Vourlakos <mvourlakos>
Status: RESOLVED NOT A BUG    
Severity: normal    
Priority: NOR    
Version First Reported In: unspecified   
Target Milestone: ---   
Platform: Other   
OS: Linux   
Latest Commit: Version Fixed/Implemented In:
Sentry Crash Report:

Description Maruthi 2022-02-27 07:39:08 UTC 
SUMMARY

The System locks up completely when launching certain Applications whether through the dock or the panel.

STEPS TO REPRODUCE
1. Launch latte-dock
2. Using the Panel or Dock (Latte Task or Task Manager) Launch GTK Applications consecutively.
3. System would lock up immediately mostly on the 3rd launch. 

OBSERVED RESULT
A complete freeze of the system. 


EXPECTED RESULT
Applications launch normally. 


SOFTWARE/OS VERSIONS
Linux/KDE Plasma: Garuda Linux (ArchBased) 
(available in About System)
KDE Plasma Version: 5.24.2
KDE Frameworks Version: 5.91.0
Qt Version: 5.15.2

ADDITIONAL INFORMATION
The only thing common in all the freezes is that the app being launched is a GTK based App.

This issue never occurs on other launch methods like using KRunner or launching the App from terminal or launching it manually not using latte-dock, no matter how much I stress the system by launching 10+ GTK Apps with multiple instances on each where possible.

After consecutively crashing the system through the latte-dock after the 3rd freeze, the system additionally defaults the kwin settings for the keyboard shortcuts, window decorations and the GTK Gnome Application Style Options.

Troubleshooting Attempts (all had no effect):
1. running latte-dock in -d(ebug) mode.
Result: system locks up before output of any useful information.
Also Magic(SysRq) Keys don't work
2. Cleared the Cache using the default app command line and manually by deleting the cache contents
3. Removed custom docks and panels and reset to the defaults.
4. Removed any externally dependent mount points which may cause lockups and ran just with the bare minimum.
5. Disabled the Compositor
6. Used both the X11 drivers AMDGPU and the older ATI
7. Disabled all additional monitors
8. Tried to switch to Wayland
Comment 1 Michail Vourlakos 2022-02-27 07:43:51 UTC 
Latte does not activate applications with its own code, it uses plasma libtaskmanager to do so: https://github.com/KDE/plasma-workspace/tree/master/libtaskmanager

nonetheless, because I know that there is a lot of discussion about this in Garuda, I will leave it open in order to collect information in case we can find the faulter at some point.
Comment 2 Michail Vourlakos 2022-02-27 07:45:43 UTC 
1. Use latte default layout with cmd: latte-dock --default-layout ,does it freeze when launching gtk applications?
Comment 3 Maruthi 2022-02-27 08:13:21 UTC 
Yes, I've done that before and it freezes just the same.
I've also just now tried is as you said in the command line and again same issue.
Comment 4 Maruthi 2022-02-27 14:36:02 UTC 
Sorry, But I just figured that its not a bug with latte.
I was trying out various things and finally tried to launch Firefox/Thunderbird over terminal along with other Applications and that causes the same result. 
Its just latte-dock allows to quickly open multiple apps whereas launching with KRunner or manual launches are much slower and masks the issue. This made it seems as if it was a latte issue.
Comment 5 Michail Vourlakos 2022-02-27 15:20:44 UTC 
(In reply to Maruthi from comment #4)
> Sorry, But I just figured that its not a bug with latte.
> I was trying out various things and finally tried to launch
> Firefox/Thunderbird over terminal along with other Applications and that
> causes the same result. 
> Its just latte-dock allows to quickly open multiple apps whereas launching
> with KRunner or manual launches are much slower and masks the issue. This
> made it seems as if it was a latte issue.

no prob. good to know...