That's right. I installed the proprietary drivers after the fglrx-packages created problems when I switched graphics cards via amdcccle or aticonfig(X-Server-crash). The problems unfortunately still exists with newest AMD Catalyst. I will deinstall the drivers, use fglrx again and report back. I don't think gpu-manager is blacklisted as I would not have had the problem (overwritten xorg.conf) in the first place. -- Philipp Commans In der Silbert 21 47877 Willich 0163 6961900 PGP-Key Threema AHZSVZ2V > Am 06.09.2014 um 13:07 schrieb Alberto Milone