SUMMARY For no reason, when I grab a window to move, it will become transparent and stay like this. What is really annoying is, if I later close this window, a ghost image of it will remain on the desktop. See attached image. Operating System: openSUSE Tumbleweed 20210710 KDE Plasma Version: 5.22.3 KDE Frameworks Version: 5.83.0 Qt Version: 5.15.2 Kernel Version: 5.13.0-1-default (64-bit) Graphics Platform: X11 Processors: 16 × AMD Ryzen 7 2700X Eight-Core Processor Memory: 31.3 GiB of RAM Graphics Processor: Radeon RX 570 Series
Created attachment 140035 [details] ghost window
I haven't encountered the bug for a while after I update to git version of KDE. Perhaps they have fixed the bug.
Happens to me somewhat often, once every few days, I have to restart kwin to get it to work again Operating System: arch KDE Plasma Version: 5.22.3 KDE Frameworks Version: 5.84.0 Qt Version: 5.15.2 Kernel Version: 5.12.15-arch1-1 (64-bit) Graphics Platform: X11 Processors: 16 × AMD Ryzen 7 3700X 8-Core Processor Memory: 31.3 GiB of RAM Graphics Processor: NVIDIA GeForce RTX 2070 SUPER/PCIe/SSE2
When this bug happens the next time, can you please open the terminal, run the following command `qdbus org.kde.KWin /KWin supportInformation`, and post its output here?
Created attachment 140240 [details] output from supportInformation Here's 2 outputs, one from when the window is ghosted but still open The next output is from after closing the ghosted window and it leaves an imprint in the background
Created attachment 140242 [details] supportInformation output
Are you using virtual desktops? Reminds me of Bug 438552.
I'm not using virtual desktops - system with two monitors (laptop built in + external). #438552 says they can't focus but in this case, I can focus and use the window normally. It's just transparent and then leaves a ghost image when I close it.
(In reply to Nate Graham from comment #7) > Are you using virtual desktops? Reminds me of Bug 438552. Yes, it appears like the translucency effect also causes this bug.
`kwin --replace` also fixes this issue when it happens.
(In reply to Devin Zuczek from comment #8) > I'm not using virtual desktops - system with two monitors (laptop built in + > external). > > #438552 says they can't focus but in this case, I can focus and use the > window normally. It's just transparent and then leaves a ghost image when I > close it. Yup this is exactly the behavior I'm coming across. I'll send my own logs once I see it happen again. Admittedly it does seem to happen less often since I reset to defaults+wobbly windows, but it does still happen.
(In reply to Nate Graham from comment #7) > Are you using virtual desktops? Reminds me of Bug 438552. Oops, I meant to reply to that other bug... I think it might be a duplicate? Both sound like the behavior I'm seeing. In the second comment in that other bug they said they didn't need to switch desktops to trigger the bug.
*** Bug 442114 has been marked as a duplicate of this bug. ***
For me running: kwin --replace indeed removes the ghost/dead windows, but leaves the desktop in a near unusable state, where its working but everything is running very very very slowly, eg typing into a konsole windows lags multiple seconds and window operations drag like a 1980's computer. the only "fix" that works for me is to restart the window manager entirely, ie log out and log back in.
I can support the observation that MarkH made: I am on Fedora 34, KDE installed from the Fedora repositories (Plasma v5.22.5, KDE frameworks v5.85.0, Qt 5.15.2). I regularly get the same transparent window effect. Restarting kwin fixes this, but afterwards everything is unusably slow.
Disabling the translucency effect also fixes ghosted windows, without the kwin --replace downside.
Top tip from Phil O, just toggle translucency off and on again clears all the "hung" windows.
I've been having this problem for a while and have been doing a kwin_x11 --replace to fix it. More interesting is that on a new install on a laptop with different hardware on a blank install (same versions as below), I experience the same problem. Operating System: Arch Linux KDE Plasma Version: 5.22.5 KDE Frameworks Version: 5.86.0 Qt Version: 5.15.2 Kernel Version: 5.14.6-arch1-1 (64-bit) Graphics Platform: X11 Processors: 16 × AMD Ryzen 7 3700X 8-Core Processor Memory: 31.3 GiB of RAM Graphics Processor: NVIDIA GeForce RTX 2070 SUPER/PCIe/SSE2
Created attachment 142300 [details] window with see through hole I disabled translucency from system setting and I am still having these problem, see this issues already 3 time in a week. I though it went away, this time please see attached pic, "win-with-hole.png" the window has a hole and when I mode it around the "see through hole" doesn't go away!
Vlad's patch (https://codereview.qt-project.org/c/qt/qtdeclarative/+/376014) has been merged, so this is officially fixed in Qt. We'll see about backporting the fix to the KDE patch collection for Qt 5.15.
Seems https://bugs.kde.org/show_bug.cgi?id=438552 should be fixed by this as well Nate.
Ah yes, you're right! Thanks for catching that!
Qt backport request: https://invent.kde.org/qt/qt/qtdeclarative/-/merge_requests/8
*** Bug 443493 has been marked as a duplicate of this bug. ***
*** Bug 445840 has been marked as a duplicate of this bug. ***
*** Bug 457126 has been marked as a duplicate of this bug. ***
*** Bug 457103 has been marked as a duplicate of this bug. ***