Problem with moving windows and icons
I just upgraded from 5.0 to 5.5. Everything works great except moving windows (or icons) often results in repeated vertical stripes on the window. The window can be reset to normal by resizing, moving it off the desktop, or covering it up with another window.
Any help would be greatly appreciated. Thanks.
ATI/AMD graphics card?
Is this Trisquel (with gnome) we're talking about?
Yes and yes.
I have a Radeon 5850. I know that ATI usually doesn't play nice with Trisquel, but 5.0 worked well so I was hopeful there might be a workaround.
Something worth trying is the latest Linux-libre kernel (where the driver lives). It's available from http://www.fsfla.org/~lxoliva/fsfla/linux-libre/releases/ (also pre-compiled, if you don't feel like doing it yourself for whatever reason)
Besides that, have you tried whether the nomodeset kernel parameter helps? (This goes into GRUB config file.)
EDIT: wrong url, the binaries are available from http://www.fsfla.org/svnwiki/selibre/linux-libre/