I'm currently using Ubuntu Mate 15.10 64-bit on an oldish FS laptop (2GB Ram). Since 15.10 is no longer supported, I thought to try 16.04. The live USB started normally, and I'm greeted with the familiar desktop.
However, there seems to be a very annoying issue: the screen produces some sort of artifacts, even at idle state, that move and distort the image. The best way to describe it is like you're watching TV with an analog antenna and the signal isn't very strong; or, you're watching an old-fashioned VCR tape and there is physical damage on the tape, producing scratches etc.
I thought the installation was corrupted so I tried again (always double-checking for the MD5sum integrity). The result is the same. I tried to search for more info about it, and I saw that some people have reported flickering issues, with the screen going black and back on. This is not what I'm facing, nor is it related to any particular program. As I said, it just happens out of the blue, at idle state, with only the desktop showing.
Any chance this is a known issue that can be rectified?
sudo lspci|grep VGA is:
01:00.0 VGA compatible controller: VIA Technologies, Inc. CN896/VN896/P4M900 [Chrome 9 HC] (rev 01)
glxinfo|grep vendor is:
server glx vendor string: SGI client glx vendor string: Mesa Project and SGI OpenGL vendor string: VMware, Inc.