I'm running a fresh install of Gentoo using the Nvidia Proprietary drivers (GTX 550-Ti) and the kdebase-meta package. I am running into this weird bug in KDE where I sometimes get a "Brown Screen" (like black/blank screen, but dark brown instead )

It is a rare occurrance but I think (not 100% sure on this) a reliable way for me to reproduce it is to start KDE, and press the application launcher in the lower left corner on my default panel. My screen will turn brown either for a short duration or until I press something, this is odd behavior and I do not like it

My other issue is compositing related (could be indirectly related to the above, I wouldn't know) but this one is more easily reproducable, I notice some strange "corruption" for example if I open the system settings, mouse over an entry and get a tooltip then move the mouse away, as the tooltip disappears it's probably supposed to "fade" or something, but while in the animation it *flickers* and there is also some noticable lag in some animations (like the desktop cube) which I think shouldn't be happening with a gaming capable opengl 4.2 card. This only happens when I am using OpenGL as a renderer, it does not when I use Xrender (but of course with xrender I can't use the awesome desktop cube animation) changing between native and raster qtgraphics seems to have no effect.

OpenGL seems to be being properly initiated for my graphics card (DRI is on and up to OpenGL 4.4 seem to be supported according to drivers/glxinfo)

In short: My compositing misbehaves a little (enough to annoy me) and I sometimes my screen mysteriously turns brown for like 2 seconds. Any ideas?

Can you please disable compositing and try to reproduce the System Settings issue?

- system settings is likely blur cache:
"kcmshell4 kwincompositing", 2nd tab, filter for blur, click config button and uncheck the only checkbox that says sth. about caching intermediate blur results

- cube lag is pot. rather a "window activation lag" - try w/ eg. the "laptop" decoration (oxygen and aurorae have animations which can make them slow on esp. nvidia)
if not, please post the output of

Code: Select all

qdbus org.kde.kwin /KWin supportInformation

Please use "code" tags (it's quite some text

- brown screen - errr... any chance to make a screenshot? (in doubt using xwd or your smartphone

Hey guys sorry for not replying, i've since the OP uninstalled gentoo and am back with arch. I think I know what the problem was, I had enabled intel DMA remapping in the kernel and this broke VDPAU for me in a very nasty kind of way (any process that would use it would turn zombie when I would try to close it) I highly suspect that that is related to this issue.

I have no idea if this is a kernel bug or an nvidia driver bug btw but it was probably not an actual KDE bug if this is the case.