Il 05/01/2015 17:58, Adam Jackson ha scritto:
On Sat, 2015-01-03 at 12:41 +0100, gil wrote:

xrandr --verbose
xrandr: Failed to get size of gamma for output default
Screen 0: minimum 640 x 480, current 1024 x 768, maximum 1024 x 768
default connected primary 1024x768+0+0 (0x17c) normal (normal) 0mm x 0mm
Typically this means you're using the vesa driver, probably because you
said "nomodeset" on the kernel command line.  If so, don't do that.

- ajax

I have not changed anything on the system configuration including the kernel.

The problem was present after installation of http://download.fedoraproject.org/pub/fedora/linux/releases/21/Live/i386/Fedora-Live-KDE-i686-21-5.iso
regards
- gil