On Sat, 28 Apr 2012 14:12:05 +0100, Matej Košík wrote: > I have installed Debian (Squeeze) on my desktop. > > I have enabled desktop environment. > > By default Xorg uses VESA driver.
That means there's a problem. Radeon driver should be loaded automatically with no user interaction. > I have the following video card (output from lpsci): > > 01:00.0 VGA compatible controller: > ATI Technologies Inc NI Caicos [AMD RADEON HD 6450] (...) That explains it all :-) There was a recent thread for a similar card (with a "northern islands" based chipset) and facing a similar problem that you're describing: http://lists.debian.org/debian-user/2012/04/msg01548.html In brief, most sure is that you're using an old version of the Xorg xserver and kernel that cannot handle you new VGA card ;-( Greetings, -- Camaleón -- To UNSUBSCRIBE, email to debian-user-requ...@lists.debian.org with a subject of "unsubscribe". Trouble? Contact listmas...@lists.debian.org Archive: http://lists.debian.org/jngri1$s83$1...@dough.gmane.org