Created attachment 117465 [details] Black rectangle around the titlebar context popup SUMMARY On Wayland, if I right click a window title bar, the context menu has a weird black rectangle around itself, instead of its shadow. i tried several different window decoration themes and the same problem occurs everytime. See screenshot for result. STEPS TO REPRODUCE 1. Start a Wayland session 2. Open any window 3. Right click the titlebar OBSERVED RESULT See screenshot ; weird black rectangle around the context popup. EXPECTED RESULT A shadow. SOFTWARE/OS VERSIONS Windows: MacOS: Linux/KDE Plasma: (available in About System) KDE Plasma Version: 5.14.5 KDE Frameworks Version: 5.54 Qt Version: 5.12.0 ADDITIONAL INFORMATION
If you're able to downgrade Qt, could you please try to reproduce the bug with Qt 5.11.X?
I still have 5.11 packages in my /var/cache/pacman/pkg/ folder, which one should I reinstall ? I don't feel like reinstalling ALL 5.11 packages...
Oh, you're using Arch. Nevermind then, downgrading packages on Arch is PITA.
@Vlad, what were you thinking could be the cause that you wanted to test?
@tromzy as well as trying different window decos, see if changing the qstyle theme makes a difference.
I started noticing this issue after upgrading to Qt 5.12. Though on X11, it's occasional.
Changing the Qt style makes a difference, but other problems occur too. The black rectangle problem seems to happen only with Kvantum Qt style ; other styles like Fusion or Breeze have their own set of glitches, but not the "rectangle for shadow" one.
After updating Qt to 5.12.1, I no longer able to reproduce it.
I am on QT 5.12.1 too and the bug still occurs.
> other styles like Fusion or Breeze have their own set of glitches Are they still present?
Hmm, I just changed from Kvantum to Breeze style ; the glitches are still present with Breeze ; but then I switched back from Breeze to Kvantum and... Problem solved ! It seems to draw the shadow correctly (although other problems remain, like the inability to close the context window, but that is probzbly another issue).
(In reply to tromzy from comment #11) > the glitches are still present with Breeze What glitches exactly?
Created attachment 117923 [details] Breeze Window decoration 1
Created attachment 117924 [details] Breeze Window decoration 2
See the 2 screenshots I provided : on "Breeze window decoration 1", I just made a right click on the title bar : the entries are blue-ish. On "Breeze window decoration 2", this is after I hovered every entry : they got even more blue.
Hmm, that glitch looks unrelated to this report. Anyway, I'm marking it as WORKSFORME. If you're still able to reproduce this bug, please file a bug report downstream (kvantum). If it turns out that's a problem in KWin (very unlikely), then please reopen this bug report.