Created attachment 135860 [details] Video showing the effect SUMMARY Since plasma 5.21 update, desktop folder view desktop icons disappear on hover STEPS TO REPRODUCE 1. Show Desktop (Folder with icons) 2. Move your mouse cursor to the area with icons and hover on or between icons 3. some icons disappear always, some sometimes, a few never 4. and only reappear on next hover OBSERVED RESULT Icons disappear EXPECTED RESULT Icons should not disappear Operating System: openSUSE Tumbleweed 20210215 KDE Plasma Version: 5.21.0 KDE Frameworks Version: 5.78.0 Qt Version: 5.15.2 Kernel Version: 5.10.16-1-default OS Type: 64-bit Graphics Platform: X11 Processors: 4 × Intel® Core™ i5-2500K CPU @ 3.30GHz Memory: 7.7 GiB of RAM Graphics Processor: Mesa DRI Intel® HD Graphics 3000 ADDITIONAL INFORMATION This is new since the Plasma 5.21 update
Oh my goodness. :( Cannot reproduce, but even so, this is really bad.
Oh my goodness. :( Canot reproduce, but even so, this is really bad
*** Bug 433528 has been marked as a duplicate of this bug. ***
it's a thing that screams graphics driver bug
FYI happens only when in "normal" Plasma mode. Stable in "Plasma (Wayland)" and "Plasma (Full Wayland)". Unfortunately the Wayland modes itself are freezing very frequently :(
(In reply to Marco Martin from comment #4) > it's a thing that screams graphics driver bug is the graphics driver used different for Wayland or "normal X"?
Wow! Found a "workaround": As long as anything is running in a plasmoid, which has to be "pinned" (to stay open), e.g. "software updates" checking for updates, all desktop icons stay stable. As soon as e.g. updates check is finished, or plasmoid unpinned, icons are disappearing again.
Please run "kcmshell5 qtquick settings" and change the backend to software and confirm if it still happens
Never used kcmshell5 before, so unsure: - adviced "kcmshell5 qtquick settings" runs into error "module qtquick not found" - "kcmshell5 --list" shows "qtquicksettings" as allowed option, tried instead. - maybe not relevant: 'Couldn't load plugin "kcms/kcm_qtquicksettings" : "The shared library was not found." -- falling back to old-style loading from desktop file' - Got "Plasma Renderer - System Settings Module". - Set "Rendering Backend" to "Software" --> No change, error still happens, icons dissappear. Will try a reboot also, if maybe needed to aplly "rendering backend"
Tried a reboot. getting a system tray/bar info icon "software renderer is used" (Maybe?) good news. icons are staying STABLE with this setting.
Thanks for the info. So it would appear that using the hardware accelerated backend is causing this. I would also lean towards a graphics driver issue. i5-2500K is quite an old CPU at this point. I wouldn't be too surprised if the drivers for it are father buggy. :/
FYI I've been the reporter of the duplicate bug 433528 (comment 3). It's a Zotac zbox nano with an Intel Celeron N2930, not an i5 as from the reporter of this bug. KDE-InfoCenter says about OpenGL "Atom Processor Z36xxx/Z37xxx Series Graphics&Display", kernel module i915. Renderer Mesa DRI Intel(R) Bay Trail, 3.0 Mesa 19.3.4
Original reporter here: After recent updates – can't remember which, Tumbleweed is a bit of a moving target – the problem has not gone away completely, but is much rarer, and more of an icon flicker than the icons disappearing completely. The situation has been improving for a while,
Definitely sounds like this is caused by GPU driver bugs. Not much we can do about it, sorry!