[Bug 99651] New: third monitor connected via dvi does not work on radeonhd 7770

[Bug 99651] New: third monitor connected via dvi does not work on radeonhd 7770

[bugzilla-daemon]

https://bugzilla.kernel.org/show_bug.cgi?id=99651

            Bug ID: 99651
           Summary: third monitor connected via dvi does not work on
                    radeonhd 7770
           Product: Drivers
           Version: 2.5
    Kernel Version: 4.0.5 and higher (tested on 4.1-rc7 also)
          Hardware: All
                OS: Linux
              Tree: Mainline
            Status: NEW
          Severity: high
          Priority: P1
         Component: Video(DRI - non Intel)
          Assignee: drivers_video-dri@kernel-bugs.osdl.org
          Reporter: sss123next@list.ru
        Regression: No

Created attachment 179171
  --> https://bugzilla.kernel.org/attachment.cgi?id=179171&action=edit
dmesg with some drm errors

after kernel update to 4.0.5 my third monitor stopped working (black screen
with blinking standby indicator), but console resolution is adjusted to lowest
monitor resolution, the one which is not working, so i guess driver see it and
trying to use, look in dmesg in attachment

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[Bug 99651] third monitor connected via dvi does not work on radeonhd 7770

[bugzilla-daemon]

https://bugzilla.kernel.org/show_bug.cgi?id=99651

Gluzskiy Alexandr <sss123next@list.ru> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
         Regression|No                          |Yes

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[Bug 99651] third monitor connected via dvi does not work on radeonhd 7770

[bugzilla-daemon]

https://bugzilla.kernel.org/show_bug.cgi?id=99651

Alex Deucher <alexdeucher@gmail.com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |alexdeucher@gmail.com

--- Comment #1 from Alex Deucher <alexdeucher@gmail.com> ---
what type of monitors/adapters are you using?  I suspect the following commits
may be at fault:
http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=a10f0df0615abb194968fc08147f3cdd70fd5aa5
http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=7fe04d6fa824ccea704535a597dc417c8687f990
Please attach your xorg log and xrandr --verbose output.

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[Bug 99651] third monitor connected via dvi does not work on radeonhd 7770

[bugzilla-daemon]

https://bugzilla.kernel.org/show_bug.cgi?id=99651

--- Comment #2 from Gluzskiy Alexandr <sss123next@list.ru> ---
Created attachment 179381
  --> https://bugzilla.kernel.org/attachment.cgi?id=179381&action=edit
xrandr --verbose on 4.0.4

all working fine here, just for monitor info

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[Bug 99651] third monitor connected via dvi does not work on radeonhd 7770

[bugzilla-daemon]

https://bugzilla.kernel.org/show_bug.cgi?id=99651

--- Comment #3 from Gluzskiy Alexandr <sss123next@list.ru> ---
Created attachment 179391
  --> https://bugzilla.kernel.org/attachment.cgi?id=179391&action=edit
xorg log on 4.0.4

xorg log on working system, just to get config info

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[Bug 99651] third monitor connected via dvi does not work on radeonhd 7770

[bugzilla-daemon]

https://bugzilla.kernel.org/show_bug.cgi?id=99651

--- Comment #4 from Gluzskiy Alexandr <sss123next@list.ru> ---
Created attachment 179401
  --> https://bugzilla.kernel.org/attachment.cgi?id=179401&action=edit
xrandr --verbose on 4.0.5

on broken system, third monitor does not work, the one with 1280x1024
resolution

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[Bug 99651] third monitor connected via dvi does not work on radeonhd 7770

[bugzilla-daemon]

https://bugzilla.kernel.org/show_bug.cgi?id=99651

--- Comment #5 from Gluzskiy Alexandr <sss123next@list.ru> ---
Created attachment 179411
  --> https://bugzilla.kernel.org/attachment.cgi?id=179411&action=edit
xorg log on 4.0.5

on broken system, third monitor does not work, the one with 1280x1024
resolution

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[Bug 99651] third monitor connected via dvi does not work on radeonhd 7770

[bugzilla-daemon]

https://bugzilla.kernel.org/show_bug.cgi?id=99651

--- Comment #6 from Gluzskiy Alexandr <sss123next@list.ru> ---
i have reverted both commits and it's fixes a problem

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