Bug 469904

Summary: Task manager freezes while evolution is sending an email
Product: [Plasma] plasmashell Reporter: David <david.cortes.rivera>
Component: Task Manager and Icons-Only Task Manager widgetsAssignee: Plasma Bugs List <plasma-bugs-null>
Status: RESOLVED FIXED    
Severity: normal CC: nate
Priority: NOR    
Version First Reported In: 5.27.2   
Target Milestone: 1.0   
Platform: Other   
OS: Linux   
Latest Commit: Version Fixed In:
Sentry Crash Report:

Description David 2023-05-17 17:29:34 UTC 
SUMMARY
The (icons-only) task manager oftentimes hangs for a while when evolution is sending an email. It doesn't happen every single time, and doesn't happen on a fresh session start. I'm not sure what entirely triggers it, but after a while of using the computer, every email sent through evolution hangs the task manager.

STEPS TO REPRODUCE
1. Use the computer normally for many hours.
2. Launch evolution (GTK email client).
3. Add your user email, write an email to some other address, and send it. Optionally, configure evolution to hold the email in an outbox for a while and wait for the exact moment at which it is sent.

OBSERVED RESULT
The task manager hangs for 1-2 seconds. Clicking icons on it during this time period doesn't trigger any action until the freeze is over, nor does right-clicking the icons, whereas switching windows with alt+tab works instantly. Other KDE apps like Kate do not suffer from any issues while this is happening. If evolution is configured to send the emails instantly and one groups windows of apps in the task manager, it will also cause a visual glitch as described in bug 445539.

EXPECTED RESULT
The task manager's inner workings should not depend on what an email client is doing.

SOFTWARE/OS VERSIONS
Operating System: Debian GNU/Linux 12
KDE Plasma Version: 5.27.2
KDE Frameworks Version: 5.103.0
Qt Version: 5.15.8
Kernel Version: 6.1.0-9-amd64 (64-bit)
Graphics Platform: X11
Processors: 20 × 12th Gen Intel® Core™ i7-12700H
Memory: 62.5 GiB of RAM
Graphics Processor: Mesa Intel® Graphics
Manufacturer: SLIMBOOK
Product Name: Executive

ADDITIONAL INFORMATION
Comment 1 Nate Graham 2023-05-17 19:14:55 UTC 
By any chance does Evolution rapidly change its window title when it sends an email?
Comment 2 David 2023-05-17 19:16:21 UTC 
(In reply to Nate Graham from comment #1)
> By any chance does Evolution rapidly change its window title when it sends
> an email?

No, at least not that I could notice. But it has its own decorations instead of a regular titlebar.
Comment 3 Nate Graham 2025-01-09 21:50:42 UTC 
Is it still happening in Plasma 6.2.5 or later, in either the X11 or Wayland session? Would be great if you can test both if possible.
Comment 4 David 2025-01-10 16:01:21 UTC 
Not reproducible in 5.27.5 after a fresh install of everything.