At initial login the plasma panel has a solid white background, not the translucent one it should have. Toggling compositing off and then on (ctrl-shift-F12, ctrl-shift-F12) restores translucency. Reproducible: Always Steps to Reproduce: 1. Set Desktop Theme to 'Air openSUSE' 2. Set Window Decoration to 'Oxygen' 3. Log out from KDE/Plasma 4. Log in to KDE/Plasma Actual Results: Plasma Panel has solid white, non-translucent background. Expected Results: Plasma Panel has translucent background. Toggling compositing off results in a Plasma Panel which still has a solid white background, but now with miniature icons. Toggling compositing back on results in a correctly displayed panel with translucent background and normal sized icons. Please see attached screenshots and kwin support information.
Created attachment 94472 [details] panel-no-translucency At initial login the panel has a solid white background.
Created attachment 94473 [details] panel-toggle-compositing-off After toggling compositing off I get a solid white background but with funky miniature icons
Created attachment 94474 [details] panel-toggle-compositing-on Toggle compositing again and I get the correct translucent background
Created attachment 94475 [details] support-info-no-translucency kwin suport info - initial login - panel with no translucency
Created attachment 94476 [details] support-info-with-translucency kwin suport info - after toggling compositing off, then on - panel with correct translucency
compositing, blur and contrast effect are loaded - plasma simply uses the wrong theme (or has the contrast hints falsely set) => Can you please try to deactivate the "contrast" effect in "kcmshell5 kwineffects" and see whether that makes any difference?
(In reply to Thomas Lübking from comment #6) > => Can you please try to deactivate the "contrast" effect in "kcmshell5 > kwineffects" and see whether that makes any difference? With the "Background contrast" effect disabled the panel remains solid white non-translucent, toggling compositing off-on does not restore translucency. Also (just discovered), I don't know if it helps in tracking this down: Re-enable "contrast" and apply - translucency returns. Disable "contrast" and apply - translucency disappears.
The behavior is because of bug #348154 Apparently plasmashell either initially picks the "wrong" theme variant or sets the "wrong" background color.
OK - Thanks...
*** This bug has been marked as a duplicate of bug 350184 ***
(In reply to David Edmundson from comment #10) > > > *** This bug has been marked as a duplicate of bug 350184 *** In marking this as a duplicate you did realise that I am using a theme with a transparent panel, (Air openSUSE), and not Breeze as that bug report seems to be referring to.
oh you're right. It does seem to be something different.
I have the same issue with kwin 5.7.1 (and for some time now) on default breeze theme. Even restarting kwin on the same session (kwin_x11 --replace) makes panels etc translucent, but on initial login everything is opaque. Tried on a fresh profile and this behavior is still present. My hardware is intel gma x4500. Any steps for further investigation would be greatly appreciated.
the bug is not in kwin, likely bug #364641 (race condition in libplasma theme code)
*** This bug has been marked as a duplicate of bug 362531 ***