https://bugs.freedesktop.org/show_bug.cgi?id=49193
--- Comment #3 from Alex Deucher <ag...@yahoo.com> 2012-04-26 20:40:25 UTC --- (In reply to comment #2) > radeon.disp_priority=2 has no effect at all. As I wrote, the problem goes away > if I disable h/w acceleration in the radeon driver, or switch to the fbdev > driver. The video resolution and timing are the same in all cases. Is this > consistent with the theory of the pixel clock being too high? It's consistent with underflow to the display controller. The memory controller on the GPU has to service several clients (displays, 3D engine, 2D engine, etc.). When you enable acceleration, the 2D and 3D engines are active and contend with the display controllers for bandwidth in the memory controller. If the memory controller not able to service the display fifo in time, it will run dry causing the blankout you see. Disabling acceleration takes the 2D and 3D engines out of contention so the memory controller only has to worry about filling display requests. A lower resolution mode will also probably help since the bandwidth requirements are lower. A 1920x1080 mode with a lower refresh rate may also help since the bandwidth requirements would also be lower (assuming your monitor will accept it). -- Configure bugmail: https://bugs.freedesktop.org/userprefs.cgi?tab=email ------- You are receiving this mail because: ------- You are the assignee for the bug. _______________________________________________ xorg-driver-ati mailing list xorg-driver-ati@lists.x.org http://lists.x.org/mailman/listinfo/xorg-driver-ati
