I think 3.0.12 is the lastest version for Linux, but you might want to check.
Just as a historical reference, I used to see issues like this with older versions of AutoCad (DOS and early windows versions) and the issue typically turned out to be video drivers or a combination of the driver and video card being used. In other words, there was a slight incompatibility between AutoCad, the video driver and the video display hardware. Interestingly in one instance, my machine did not have the issue and the other workstation did, and both systems were identical, purchased at the same time, with the same video cards, drivers, memory, and identical settings and OS.
If you are using an LCD monitor, also make sure that you are using the "native" resolution for the monitor. I've seen some bizarre behavior when an LCD monitor is set to other than the native resolution.