https://bugzilla.kernel.org/show_bug.cgi?id=66871
Bug ID: 66871 Summary: Radeon multi-screen intermittent display failure Product: Drivers Version: 2.5 Kernel Version: 3.13.0-rc3 Hardware: x86-64 OS: Linux Tree: Mainline Status: NEW Severity: normal Priority: P1 Component: Video(DRI - non Intel) Assignee: drivers_video-dri@kernel-bugs.osdl.org Reporter: erik@emedwards.info Regression: No
In this kernel the 3rd display only comes on for a few partial frames every 20 to 40 seconds. Three displays attached to motherboard.
Under kernel 3.11.10, Radeon driver operates correctly.
Using: ASRock FM2A85X-ITX MB AMD A10-6800k (Not overclocked) 8 GB DDR3 VGA montitor - Dell flat screen - 19" HDMI0 montitor - (via DVI connector) - Acer 23" flat. HDMI1 montitor - (via HDMI connector) - Acer 22" flat
VGA is 1 - on an the left. HDMI1 is 2 - in the center. HDMI0 is 3 - on the right.