Bug 421304

Summary:	[NVIDIA on X11] Plasma panel stops updating at some point
Product:	[Plasma] plasmashell	Reporter:	Lastique <andysem>
Component:	Panel	Assignee:	Plasma Bugs List <plasma-bugs-null>
Status:	RESOLVED WORKSFORME
Severity:	normal	CC:	graeme, hujq, justin.zobel, mmbossoni, nate, pavel.datsenko, teadrinkingprogrammer, truefiresnake
Priority:	NOR
Version First Reported In:	5.23.5
Target Milestone:	1.0
Platform:	Kubuntu
OS:	Linux
Latest Commit:		Version Fixed In:
Sentry Crash Report:

Description Lastique 2020-05-10 18:48:38 UTC

At some seemingly random points in time Plasma panel stops updating. The last drawn panel contents stay frozen until I interact with the panel - for example, right click on it or launch an application through an icon on the panel. At that point of interaction a single update is made and the panel freezes again.

I can see that applets continue to function while the panel is frozen. E.g. CPU load monitor shows a graph with proper CPU load history when the panel is redrawn.

I do not have any fixed steps to reproduce the problem. It just happens by itself, while the PC is idle or while it's doing some work. I don't log out or lock the screen or put the PC to sleep or hibernate or switch to a VT - the PC stays logged in, with Plasma desktop active for the whole time.

I can "fix" the problem by killing and restarting plasmashell. After that the panel starts updating again.

SOFTWARE/OS VERSIONS

Operating System: Kubuntu 20.04
KDE Plasma Version: 5.18.4
KDE Frameworks Version: 5.68.0
Qt Version: 5.12.8
Kernel Version: 5.4.0-29-lowlatency
OS Type: 64-bit
Nvidia driver: 440.66.12

This did not happen in Kubuntu 19.10 with Plasma 5.16.5.

Comment 1 Pavel 2020-12-11 15:36:38 UTC

Same thing here, but on different distribution. I also noticed that when I hover all programs in the task list everything is fine, except for web browser I use (which is Vivaldi with ~150 tabs open). In this case terminal, from which i restarted plasmashell, spits an error like this:

file:///usr/share/plasma/plasmoids/org.kde.plasma.taskmanager/contents/ui/ToolTipInstance.qml:209:9: QML Image: Error decoding: https://i.ytimg.com/vi/xPU8OAjjS4k/hqdefault.jpg?sqp=-oaymwEZCNACELwBSFXyq4qpAwsIARUAAIhCGAFwAQ==&rs=AOn4CLAAKevt0iZpZymPcHIJLkP_craJ4w: Unsupported image format

The link is always to a picture preview for the last watched video on YouTube. 

Another thing is that plasmashell after about a week grows in memory usage from ~200Mb to ~1000Mb.

Operating System: Solus 4.1
KDE Plasma Version: 5.20.3
KDE Frameworks Version: 5.76.0
Qt Version: 5.15.2
Kernel Version: 5.6.19-159.current
OS Type: 64-bit
Processors: 4 × Intel® Core™ i3-8100 CPU @ 3.60GHz
Memory: 15.5 ГиБ of RAM
Graphics Processor: Mesa Intel® UHD Graphics 630

Graphics:
  Device-1: Intel 8th Gen Core Processor Gaussian Mixture Model driver: i915 v: kernel 
  Display: x11 server: X.Org 1.20.9 driver: modesetting unloaded: fbdev,vesa 
  resolution: 1920x1080~60Hz 
  OpenGL: renderer: Mesa Intel UHD Graphics 630 (CFL GT2) v: 4.6 Mesa 20.1.9

Comment 2 Nate Graham 2022-01-30 19:47:50 UTC

*** Bug 437949 has been marked as a duplicate of this bug. ***

Comment 3 Nate Graham 2022-01-30 19:48:06 UTC

*** Bug 411858 has been marked as a duplicate of this bug. ***

Comment 4 Marcelo Bossoni 2022-02-12 15:23:22 UTC

Have this same bug, but just on wayland session (what is weird)

Entering Edit mode and moving panel to another screen corner and back to the original place restore updates.

Operating System: Arch Linux
KDE Plasma Version: 5.24.0
KDE Frameworks Version: 5.90.0
Qt Version: 5.15.2
Kernel Version: 5.16.8-xanmod1-1 (64-bit)
Graphics Platform: Wayland
Processors: 12 × AMD Ryzen 5 1600 Six-Core Processor
Memory: 15.6 GiB of RAM
Graphics Processor: NVIDIA GeForce GTX 1070/PCIe/SSE2

Comment 5 teadrinkingprogrammer 2022-02-20 12:47:32 UTC

I have the same problem as Marcelo Bossoni, it has only started with me after switching to Wayland. I see a lot of bug reports and don't know if it has already been fixed in newer versions but it certainly doesn't work on my current version.

Operating System: Manjaro KDE
KDE Plasma Version: 5.23.5
KDE Frameworks Version: 5.90.0
Qt Version: 5.15.2
Kernel Version: 5.15.21-1
Graphics Platform: Wayland
Processors: 12 × AMD Ryzen 5 3600 6-Core Processor
Memory: 15.6 GiB of RAM
Graphics Processor: AMD Radeon RX 5700XT

Comment 6 Justin Zobel 2022-06-01 23:14:38 UTC

Same issue. @Lastique @Pavel are you both on Wayland?

Operating System: Fedora Linux 36
KDE Plasma Version: 5.24.5
KDE Frameworks Version: 5.93.0
Qt Version: 5.15.3
Kernel Version: 5.17.11-300.fc36.x86_64 (64-bit)
Graphics Platform: Wayland
Processors: 12 × AMD Ryzen 5 3600 6-Core Processor
Memory: 31.3 GiB of RAM
Graphics Processor: NVIDIA GeForce GTX 1060 6GB/PCIe/SSE2

Comment 7 Pavel 2022-06-02 08:13:03 UTC

(In reply to Justin Zobel from comment #6)
> Same issue. @Lastique @Pavel are you both on Wayland?
> 
> Operating System: Fedora Linux 36
> KDE Plasma Version: 5.24.5
> KDE Frameworks Version: 5.93.0
> Qt Version: 5.15.3
> Kernel Version: 5.17.11-300.fc36.x86_64 (64-bit)
> Graphics Platform: Wayland
> Processors: 12 × AMD Ryzen 5 3600 6-Core Processor
> Memory: 31.3 GiB of RAM
> Graphics Processor: NVIDIA GeForce GTX 1060 6GB/PCIe/SSE2

Nope, I'm on X11. I had birdtray configured to blink when there was new email and suspected it to be the reason, so I disabled it. Haven't encountered this issue for about half a year now (maybe it just got fixed).

Comment 8 Lastique 2022-06-02 08:51:50 UTC

I'm also on X11. The problem hasn't appeared for quite a while for me (probably, through Kubuntu 21.10 and 22.04, I can't remember before 21.10). Though I try not to touch plasma too much.

Comment 9 Nate Graham 2023-09-18 18:43:49 UTC

Does the issue go away if you disable "small previews" shown when hovering over tasks? If so, this is Bug 469016.

Comment 10 Lastique 2023-09-18 20:29:51 UTC

(In reply to Nate Graham from comment #9)
> Does the issue go away if you disable "small previews" shown when hovering
> over tasks? If so, this is Bug 469016.

To reiterate I'm *not* using Wayland, and that bug seems to be about Wayland. Please consider this bug focused on X11.

I do have window previews enabled, but I haven't seen this bug for quite a while (currently, I'm on Kubuntu 22.04). I'm not sure how to trigger this bug at this point.

Comment 11 Nate Graham 2023-09-18 21:14:33 UTC

Ok, thanks. If you can't reproduce it, and no one else can reproduce it either, than I'm afraid it's not actionable. :( So I'm going to close this as RESOLVED WORKSFORME now, but please do feel free to re-open it if you're able to reproduce it again--especially if you find a reliable way to do so. Thanks a lot!