Yes, I use proprietary nvidia drivers. The packages nvidia-common and nvidia-current are selected. I have the problem with main repository and backports if this matters.

I have open-source ATI drivers:

Name : xf86-video-ati
Version : 6.13.2-2

Which Qt version is in use here?

Code: Select all

plasma-desktop --version

$ plasma-desktop --version
Qt: 4.7.0
KDE: 4.5.4 (KDE 4.5.4)
Plasma-Arbeitsfläche: 0.3

Thanks for your patience. These problems are hard to track down without error message.

Just for demonstrative purposes...


While I rearranged my desktop icons I made another observation. The square react on drag events, more precisely in some cases (the behavior is non deterministic) if i select an icon beneath the square the mouse cursor indicate a "must not drop here" event.

I think i have freshest released (stable) packages, Arch packagers are really fast.

Qt: 4.7.1
KDE Development Platform: 4.5.4 (KDE 4.5.4)
Plasma Workspace: 0.3

Hello,

I also have this annoying transparent square appearing on my desktop though it doesn't appear at each login. I never managed to figure a pattern determining its appearance at login.



As you may have noticed, it appears only when I move my cursor to the bottom of my screen to show the panel.
For me, it all started when I moved from KDEmod 4.4 to the "regular" KDE 4.5 (like Arteal, I'm using Arch).
I noticed that I could get rid of this transparent square temporarily (as long as I don't log off actually) by disabling then re-enabling desktop effects (via Alt + Shift + F12 shortcut) but still, I'm not satisfied.

Any clue why this happens?
Is there even a bug report about this issue? I couldn't find one (granted, I didn't look for it during hours).
For a top-class DE such as KDE, this is very strange.

Oh, and by the way, here's my software configuration:
Distribution: Arch
Video driver: nvidia (proprietary) 260.19.21
Qt: 4.7.1
KDE Development Platform: 4.5.4 (KDE 4.5.4)
Plasma Workspace: 0.3

Happens for me also. nVidia drivers KDE 4.5.5.

The bug has been reported here:
https://bugs.kde.org/show_bug.cgi?id=264140