KDE freeze randomly AFTER Firefox or Thunderbir minimized

[Guest]

KDE freezes totally on my ThinkPad T61 with nVidia Quadro NVS 140 (no proprietary drivers installed yet) after few "minimize" actions on Firefox or Thunderbird.

Steps to reproduce:
* log in
* open firefox, google chrome, some other windows
* use computer for a while, browse internet
* minimize, maximize Firefox/Thunderbird couple of times
> then, after one minimize more KDE freezes

After 2,3 freezes I installed SSH server and now after freeze I can at least cleanly shutdown/reboot the computer.

Any suggestions? I will start with nVidia proprietary driver installation.

[Dutchman]

I've had this problem before, back when I was using openSUSE, KDE 4.7-something if I remember. The cure was to disable the button effects. Try this:

Go to System Settings > Workspace Appearance > Window Decorations, then under the images of the windows, click the button that says "Configure Decoration...". You'll see a toggle for "Enable Animations", turn it off, then log out and back in again.

That worked for me with openSUSE a while back, and since, even now with Kubuntu, it's one of the first things I turn off. Don't know what it's suppose to do to begin with, it doesn't seem to make any difference in the appearance that I can see.

[molecule-eye]

I'm having the same issue. I'll try disabling decoration animations. As far as I can see, the only difference it makes is with fading in/out on mouse-over of buttons (which glow red/blue). It's nicer with the animal, subtly, but if it's causing firefox to crash, I can say goodbye. We'll see if it works.