Bug 449722

Created attachment 146362 [details]
Notifications - extra height glitch

SUMMARY

Sometimes notifications from various sources (like file operations, applets removal, "notification" service from the eponymous Plasma data source -> createNotification operation) may appear with a persistent extra padding on the bottom: about 72 px height below the content. It is persistent in a sense that once a notification is created, it will not alter its geometry until it dismisses.

Such glitched notifications are rare and very inconsistent to get. My best bet would be to use "notifications" Plasma data source to emit twice as much notifications as needed to cover your screen entirely (so that the new ones have to wait their turn).

STEPS TO REPRODUCE
1. Get a notification.
2. ???
3. 0.1% chance that it is glitched.

OBSERVED RESULT
Extra empty vertical space below the content of notification.

EXPECTED RESULT
Notifications should adjust to content size.

SOFTWARE/OS VERSIONS
Operating System: Arch Linux
KDE Plasma Version: 5.24.80
KDE Frameworks Version: 5.91.0
Qt Version: 5.15.2
Kernel Version: 5.16.5-arch1-1 (64-bit)
Graphics Platform: X11
Processors: 8 × Intel® Core™ i7-6700HQ CPU @ 2.60GHz
Memory: 15.6 GiB of RAM
Graphics Processor: NVIDIA GeForce GTX 970M/PCIe/SSE2

plasma-desktop: 963b4ee7a1c56ee68a2d5bf0557862d497fea974
plasma-workspace: daed0461ebafe1c70821f6852394b058078d3315
plasma-framework: 850051e0a0b577e6c22b67e2ba04a7c8c8ed25cb

ADDITIONAL INFORMATION

Telegram thread where I first discussed this issue starts here: https://t.me/vdgmainroom/311295
This turned out to be quite old and known issue, although no one seems to have any idea how to fix it.