I have got a graphic problem, but I don't have a clue how to find the source of it.
It seems like some parts of the display won't refresh when I am moving a window. It also has to be some software error, as it is shown on the screen shot below.
Screen shot of the error.
The Computer is a modified version of the Dell Vostro 3450. It uses the Intel HD Graphics of the built-in Intel I5. (Some more information: 16 GB Ram, 500 GB HDD and 128 GB SSD.)
I'm running the 12.04 LTS.
Here the output of the requested command:
lspci | grep VGA 00:02.0 VGA compatible controller: Intel Corporation 2nd Generation Core Processor Family Integrated Graphics Controller (rev 09)
It also seems to be a unity problem. I switched to Gnome classic and it runs fine. Also this problem occured just two days ago.I didn't use the Laptop for about a week, started it 2 days ago(usually its always in standby-mode, but it may have run out of power) and then recognized the error. After that i installed all updates, but the error is still there.
Okay, its gone. I ran Ubuntu-Tweek's janitor, which basically clears/removes the apt-cache, old kernels, package configuration and unneeded packages. Then i restarted unity and it looks all good.