After the theme breeze dark is applied the menu turn in white, with breeze theme white the menu stay in normal appearance. Reproducible: Always Expected Results: the resul should that the menu goes dark along the breeze theme.
screenshot of the problem http://matpolonio.deviantart.com/art/Screen2-489173397?ga_submit_new=10%253A1413619150
I see you're trying this in a virtual box; can you confirm this also happens for you on a real hardware? VMs are known to random graphics issues, this might be one of them.
Nothing changed but Breeze dark has failed to apply itself on my system T420i. Everything, including panel, widget browser, kickoff, is transparent or white on white making it impossible to see. Breeze works fine but if you change it to Breeze Dark everything goes transparent.
Can you try turning off compositing mode (Alt+shift+f12 ) - does that help?
*** Bug 340617 has been marked as a duplicate of this bug. ***
This happens in VirtualBox and is related somehow to their 3d support (or the lack thereof) for QT5. With 3D support turned on it just fails to load the Plasma 5 desktop. Without 3D support AND effects turned off things go as expected (i.e. dark backgrounds are OK) With effects on, it kind of looks like it has a combination of two issues: 1. loss of color settings for dialogues: every background is rendered in light gray (menu, krunner etc, but not the panel) while using the font color settings right 2. transparency levels seem to get increased way more then in other hardware environments The result is a menu rendered with white fonts on very transparent light gray background making it unusable. There are a few seemingly related threads in the virtualbox bugtracker and forums: https://www.virtualbox.org/ticket/12941 , https://forums.virtualbox.org/viewtopic.php?f=8&t=64402 , etc.
I have a similar problem mentioned in https://bugs.kde.org/show_bug.cgi?id=340617 on i7-4558U/Iris 5100. The K menu stays bright after applying breeze dark. It is dark when compositing is off.
I seem to have the same problem, but only when the blur effect is disabled.
Can confirm this is an issue. Workaround is to either disable compositing or turning on the blur effect. plasma-workspace 5.2.0-3 on Arch Linux
I can confirm this issue on Arch Linux as well. Using both ATI and Intel graphics. Even have the issue with blur enabled. Have switched to OpenGL compositing which actually does make compositing faster for me but does not solve the issue. I can not solve this other than to disable compositing.
I was able to reproduce this issue once (bare-meta), then I did: kquitapp plasmashell rm -f ~/.cache/plasma-svgelements-* ~/.cache/*.kcache (restart) plasmashell and now I've switched between breeze (light) and breeze dark plasma themes 5 times without issue (using fedora 22, kf5 5.8, plasma 5.2.2)
I take it back a bit, my reproducer wasn't exactly the same as other reporters, mine was that the panel turned (mostly) white and I could no longer distinguish systray icons (I didn't look at kickoff)
There was a change in 5.12 that should fix this commit d65c0ed1d07b4fb09643c9401a6697db1282d89e Author: Kai Uwe Broulik <kde@privat.broulik.de> Date: Mon Jun 8 17:30:38 2015 +0200 Bind translucent theme to background contrast rather than blur effect Only the background contrast effect provides real contrast for contents, the blur effect doesn't improve readability that much; so we now use the translucent theme only when we have the background contrast effect. This significantly improves readability. CHANGELOG: An opaque theme is now used when only the blur effect is available REVIEW: 124039 BUG: 342934 BUG: 348154