[Bug 66871] New: Radeon multi-screen intermittent display failure

[Bug 66871] New: Radeon multi-screen intermittent display failure

[bugzilla-daemon]

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.

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[Bug 66871] Radeon multi-screen intermittent display failure

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https://bugzilla.kernel.org/show_bug.cgi?id=66871

--- Comment #1 from Michel Dänzer <michel@daenzer.net> ---
Can you bisect?

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[Bug 66871] Radeon multi-screen intermittent display failure

[bugzilla-daemon]

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.

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[Bug 66871] Radeon multi-screen intermittent display failure

[bugzilla-daemon]

https://bugzilla.kernel.org/show_bug.cgi?id=66871

--- Comment #3 from Erik Edwards <erik@emedwards.info> ---
I'm not sure what you mean.

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[Bug 66871] Radeon multi-screen intermittent display failure

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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

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[Bug 66871] Radeon multi-screen intermittent display failure

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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

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[Bug 66871] Radeon multi-screen intermittent display failure

[bugzilla-daemon]

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

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[Bug 66871] Radeon multi-screen intermittent display failure

[bugzilla-daemon]

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).

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[Bug 66871] Radeon multi-screen intermittent display failure

[bugzilla-daemon]

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.

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[Bug 66871] Radeon multi-screen intermittent display failure

[bugzilla-daemon]

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.

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