VGA compatible controller: Advanced Micro Devices, Inc. [AMD/ATI] Cape Verde PRO [Radeon HD 7750 / R7 250E] (prog-if 00 [VGA controller]) Subsystem: PC Partner Limited / Sapphire Technology Cape Verde PRO [Radeon HD 7750/8740 / R7 250E] -- My 3rd display: DVI-0 connected 1680x1050+3840+0 (normal left inverted right x axis y axis) 474mm x 296mm 1680x1050 59.88*+ Flickers on and off a couple of times per minute. Nothing in dmesg but I see this in xorg.log: [ 487.411] (WW) RADEON(0): flip queue failed in radeon_scanout_flip: Device or resource busy [ 487.427] (WW) RADEON(0): flip queue failed in radeon_scanout_flip: Device or resource busy [ 517.461] (WW) RADEON(0): flip queue failed in radeon_scanout_flip: Device or resource busy [ 517.477] (WW) RADEON(0): flip queue failed in radeon_scanout_flip: Device or resource busy Reverting http://cgit.freedesktop.org/xorg/driver/xf86-video-ati/commit/?id=ddaba449e8d6fe9fc0d97085e4045843fd8d7af9 solves my issues.
Created attachment 116981 [details] [review] Patch Can you check whether attached patch helps?
(In reply to Piotr Redlewski from comment #1) > Created attachment 116981 [details] [review] [review] > Patch > > Can you check whether attached patch helps? Yeah, that does the trick. Thanks
commit a8ed62010d5012dfb27773595c446b217f3c00c5 Author: Piotr Redlewski <predlewski@gmail.com> Date: Mon Jul 6 19:57:07 2015 +0200 Do not try to enable already enabled CRTCs in DPMS hook
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