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.
https://bugzilla.kernel.org/show_bug.cgi?id=66871
--- Comment #1 from Michel Dänzer michel@daenzer.net --- Can you bisect?
https://bugzilla.kernel.org/show_bug.cgi?id=66871
Alex Deucher alexdeucher@gmail.com changed:
What |Removed |Added ---------------------------------------------------------------------------- CC| |alexdeucher@gmail.com
--- Comment #2 from Alex Deucher alexdeucher@gmail.com --- Please attach your xorg log and dmesg output as well.
https://bugzilla.kernel.org/show_bug.cgi?id=66871
--- Comment #3 from Erik Edwards erik@emedwards.info --- I'm not sure what you mean.
https://bugzilla.kernel.org/show_bug.cgi?id=66871
--- Comment #4 from Erik Edwards erik@emedwards.info --- Created attachment 118061 --> https://bugzilla.kernel.org/attachment.cgi?id=118061&action=edit dmesg
https://bugzilla.kernel.org/show_bug.cgi?id=66871
--- Comment #5 from Erik Edwards erik@emedwards.info --- Created attachment 118071 --> https://bugzilla.kernel.org/attachment.cgi?id=118071&action=edit Xorg.log
https://bugzilla.kernel.org/show_bug.cgi?id=66871
--- Comment #6 from Erik Edwards erik@emedwards.info --- Created attachment 118081 --> https://bugzilla.kernel.org/attachment.cgi?id=118081&action=edit System messages
https://bugzilla.kernel.org/show_bug.cgi?id=66871
--- Comment #7 from Erik Edwards erik@emedwards.info --- Fedora released 3.13.3 (kernel.x86_64 0:3.13.3-201.fc20) and this is still happening; though, it doesn't happen with 3.12.10 (kernel-3.12.10-300.fc20.x86_64).
https://bugzilla.kernel.org/show_bug.cgi?id=66871
--- Comment #8 from Alex Deucher alexdeucher@gmail.com --- Can you use git to bisect what commit caused the regression? Google for git bisect howto.
https://bugzilla.kernel.org/show_bug.cgi?id=66871
--- Comment #9 from Erik Edwards erik@emedwards.info --- (In reply to Alex Deucher from comment #8)
Can you use git to bisect what commit caused the regression? Google for git bisect howto.
3.12.5
Found a workaround:
Allow nromal boot to graphical environment with all monitors powered on. After GUI login is displayed and DVI connected monitor is blank do <ctrl><alt>F2 to switch to text console. Wait until all working displayas are stable then power off and power on non-fucntional display via its power button. Wait until all displays are stable then return to GUI.
dri-devel@lists.freedesktop.org
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