SUMMARY This is basically the same as bug 209152, but is in much newer plasma. I made desktoip background to be slideshow, added directory with 192 files, totaling 694MB of data, and whenever new background fades-in precessing of other things stops briefly. STEPS TO REPRODUCE 1. Change wallpaper type to slideshow 2. Add to folders some folder with images 3. Start konsole, and in it run bash -c "while true; do time sleep 0.02; done" 2>&1 | grep real 4. while it's running, right click on desktop, and click "next wallpaper image" observe that times shown in konsole stop scrolling for a brief moment. OBSERVED RESULT EXPECTED RESULT SOFTWARE/OS VERSIONS Windows: macOS: Linux/KDE Plasma: (available in About System) KDE Plasma Version: KDE Frameworks Version: Qt Version: ADDITIONAL INFORMATION
Based on comment on IRC, I'm changing product to plasmashell.
So we skip some frames, but not completely Can you move the mouse fluidly during this time?
Yes. Only terminal actions are paused, as far as I can tell.
Today the problem is more severe. Mouse also starts to skip when wallpaper changes, and other apps (specifically: game written in java) temporarily freeze while wallpaper change is happening.
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What graphics hardware are you using?
Some MSI card with Nvidia GTX 1070 chip. lspci -v for this card: 01:00.0 VGA compatible controller: NVIDIA Corporation GP104 [GeForce GTX 1070] (rev a1) (prog-if 00 [VGA controller]) Subsystem: Micro-Star International Co., Ltd. [MSI] GP104 [GeForce GTX 1070] Flags: bus master, fast devsel, latency 0, IRQ 156 Memory at de000000 (32-bit, non-prefetchable) [size=16M] Memory at c0000000 (64-bit, prefetchable) [size=256M] Memory at d0000000 (64-bit, prefetchable) [size=32M] I/O ports at e000 [size=128] Expansion ROM at 000c0000 [virtual] [disabled] [size=128K] Capabilities: <access denied> Kernel driver in use: nvidia Kernel modules: nvidia Also, please note. Since I reported it, and it didn't work well for me, I upgraded system, and then, for unrelated reasons, had to reinstall. The problem does not occur now.
I had a feeling it was NVIDIA. I suspect that a driver update fixed the issue. Let us know if it happens again and we can re-investigate.