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I'm running Debian Wheezy and recently, after a normal software upgrade via Apt-get, I noticed that screen refreshes when using GIMP was extremely slow. Another thing that happened was that the GIMP toolbox icons didn't display. Also, in the top menu bar of Gnome, the sound icon disappeared.
A google revealed that similar problems were related to either KDE or Nvidia. I don't use KDE and, to the best of my knowledge, my PC does not have an Nvidia card.
Some time after the problem described above had appeared, I did another regular upgrade and the problem disappeared. I did notice, while running the upgrade, that some xorg/xserver files were marked for upgrade.
I thought all was well, but I was wrong. A subsequent upgrade once again caused everything graphic to slow down to a crawl. And that is the status at the moment.
If I run another distro from a live CD (e.g. Knoppix) the problem disappears, but that doesn't solve my problem because I don't want to install another distro. I want a pure Debian installation.
Has anybody had a similar problem? Is there a solution available?
Any help/advice/pointers in the right direction will be appreciated. Naturally I will gladly post any further info that could help to diagnose and solve the problem
I think the first step is to identify which process is consumming a lot of cpu / memory.
You can use the task manager of your desktop environment.
Otherwise from a terminal, you can use below tools:
Is it firmware-linux-nonfree from the non-free repository? At least it has fixed a bunch of computers for me. But I'd just enable the non-free repository and download the firmware-linux package, which delegates both the free and non-free firmware.
(That is if they have the same name in Wheezy as in Squeeze.)