I've been having screen flickering problems for several months now, but didn't have the chance to report it. Now I have the time, but I don't know who should receive the report: Mesa, Xorg, or AMD? I don't know if the problem is on the Firmware, the free drivers, or Xorg. GPU: Sapphire Radeon Dual-X R9 270X OC Edition Monitor: Samsung SyncMaster 796MB 17" Flat The problem occurs on these resolutions: 1600x1200 65 Hz- Doesn't Occur 1280x1024 75 Hz - Frequent 1152x865 75 Hz - Sometimes 1024x768 - Doesn't happen 800x600 - Doesn't happen 640x480 - Doesn't happen Using Catalyst instead of Radeon solves the problem, but I decided not to use Catalyst anymore. No closed-source modules on my Kernel. I can't use other resolutions than 1280x1024, the one that flickers. 1600x1200 has a refresh rate of 65 Hz and this causes my eyes to hurt and it gives me headackes. 1152x864 and lower res are too "big" and I can't work (with Blender) or game on them.