[Bug 98751] New: radeon: multihead "no signal" on one of the monitors - regression

[Bug 98751] New: radeon: multihead "no signal" on one of the monitors - regression

[bugzilla-daemon]

https://bugzilla.kernel.org/show_bug.cgi?id=98751

            Bug ID: 98751
           Summary: radeon: multihead "no signal" on one of the monitors -
                    regression
           Product: Drivers
           Version: 2.5
    Kernel Version: 4.0.3+
          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: mikkeloscar@gmail.com
        Regression: No

Since this commit:
https://git.kernel.org/cgit/linux/kernel/git/stable/linux-stable.git/commit/?id=d5c3b64
one of my two monitors doesn't get a signal (it just says "no signal").

The monitors are connected to a Radeon HD 6990 card. One is connected through
HDMI and one through DVI. I'm using the radeon driver.

Most of the time it is the monitor connected through HDMI which doesn't get a
signal, but I was able to switch it around somehow by messing around with
screen orientation in X (not quite sure how to replicate or if it's even
relevant).

I tried to revert the commit in kernel 4.0.4 (latest I tried) and that solves
the problem for me.

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[Bug 98751] radeon: multihead "no signal" on one of the monitors - regression

[bugzilla-daemon]

https://bugzilla.kernel.org/show_bug.cgi?id=98751

Mikkel Oscar Lyderik <mikkeloscar@gmail.com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |mikkeloscar@gmail.com
         Regression|No                          |Yes
           Severity|high                        |normal

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[Bug 98751] radeon: multihead "no signal" on one of the monitors - regression

[bugzilla-daemon]

https://bugzilla.kernel.org/show_bug.cgi?id=98751

Alex Deucher <alexdeucher@gmail.com> changed:

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

--- Comment #1 from Alex Deucher <alexdeucher@gmail.com> ---
Please attach your xorg log and dmesg output.

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[Bug 98751] radeon: multihead "no signal" on one of the monitors - regression

[bugzilla-daemon]

https://bugzilla.kernel.org/show_bug.cgi?id=98751

--- Comment #2 from Mikkel Oscar Lyderik <mikkeloscar@gmail.com> ---
Created attachment 177561
  --> https://bugzilla.kernel.org/attachment.cgi?id=177561&action=edit
dmesg

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[Bug 98751] radeon: multihead "no signal" on one of the monitors - regression

[bugzilla-daemon]

https://bugzilla.kernel.org/show_bug.cgi?id=98751

--- Comment #3 from Mikkel Oscar Lyderik <mikkeloscar@gmail.com> ---
Created attachment 177571
  --> https://bugzilla.kernel.org/attachment.cgi?id=177571&action=edit
xorg log

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[Bug 98751] radeon: multihead "no signal" on one of the monitors - regression

[bugzilla-daemon]

https://bugzilla.kernel.org/show_bug.cgi?id=98751

Mike Noe <noeerover@gmail.com> changed:

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

--- Comment #4 from Mike Noe <noeerover@gmail.com> ---
Same problem here on Tumbleweed x86-64

I have a monitor connected to DVI and a HDTV connected to HDMI on a
HD6570 (Turks).  Recent TW dup with the 4.03 kernel breaks dual-mon
support.  Basically, when booting (with the HDTV on) or when connecting
the HDTV (via HDMI), the primary monitor on DVI just goes directly into
sleep mode and won't come back unless I use xrandr directly.  If I get
to Kscreen5, I can disable the HDMI which will then re-enable the DVI
(even though it shows enabled).

4.01 and earlier work great, do not have this problem.  I also tried on the
latest two RCs with the same results.

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[Bug 98751] radeon: multihead "no signal" on one of the monitors - regression

[bugzilla-daemon]

https://bugzilla.kernel.org/show_bug.cgi?id=98751

--- Comment #5 from Mike Noe <noeerover@gmail.com> ---
Created attachment 177581
  --> https://bugzilla.kernel.org/attachment.cgi?id=177581&action=edit
xorg.log

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[Bug 98751] radeon: multihead "no signal" on one of the monitors - regression

[bugzilla-daemon]

https://bugzilla.kernel.org/show_bug.cgi?id=98751

--- Comment #6 from Mike Noe <noeerover@gmail.com> ---
Created attachment 177591
  --> https://bugzilla.kernel.org/attachment.cgi?id=177591&action=edit
dmesg.txt

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[Bug 98751] radeon: multihead "no signal" on one of the monitors - regression

[bugzilla-daemon]

https://bugzilla.kernel.org/show_bug.cgi?id=98751

Robin Bankhead <kernel@headbank.co.uk> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |kernel@headbank.co.uk

--- Comment #7 from Robin Bankhead <kernel@headbank.co.uk> ---
Duplicate of #98651.

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[Bug 98751] radeon: multihead "no signal" on one of the monitors - regression

[bugzilla-daemon]

https://bugzilla.kernel.org/show_bug.cgi?id=98751

--- Comment #8 from Mikkel Oscar Lyderik <mikkeloscar@gmail.com> ---
It's actually a 6950 card I have, same as in #98651.

I called it 6990 because that is what lspci tells me, but that might narrow it
down?

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[Bug 98751] radeon: multihead "no signal" on one of the monitors - regression

[bugzilla-daemon]

https://bugzilla.kernel.org/show_bug.cgi?id=98751

Andy Furniss <adf.lists@gmail.com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |adf.lists@gmail.com

--- Comment #9 from Andy Furniss <adf.lists@gmail.com> ---
I just hit this one with my R9270X.

Reverting "drm/radeon: adjust pll when audio is not enabled" fixes it.

For me starting with DVI on and enabling HDMI results in loosing DVI. If I off
then auto DVI it comes back but HDMI goes off, repeat for HDMI = DVI off again
and so on.

I did find a way to get both working = xset dpms force off 
then coming out of dpms both will come on an behave as if nothing was ever
wrong (I can flip either on/off without affecting the other).

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[Bug 98751] radeon: multihead "no signal" on one of the monitors - regression

[bugzilla-daemon]

https://bugzilla.kernel.org/show_bug.cgi?id=98751

--- Comment #10 from Alex Deucher <alexdeucher@gmail.com> ---
Created attachment 178001
  --> https://bugzilla.kernel.org/attachment.cgi?id=178001&action=edit
possible fix

Does the attached patch help?

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[Bug 98751] radeon: multihead "no signal" on one of the monitors - regression

[bugzilla-daemon]

https://bugzilla.kernel.org/show_bug.cgi?id=98751

--- Comment #11 from Mikkel Oscar Lyderik <mikkeloscar@gmail.com> ---
It's working for me!

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[Bug 98751] radeon: multihead "no signal" on one of the monitors - regression

[bugzilla-daemon]

https://bugzilla.kernel.org/show_bug.cgi?id=98751

--- Comment #12 from Mike Noe <noeerover@gmail.com> ---
Yes, fixed it here too on Turks, tested with 4.1-RC5

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[Bug 98751] radeon: multihead "no signal" on one of the monitors - regression

[bugzilla-daemon]

https://bugzilla.kernel.org/show_bug.cgi?id=98751

--- Comment #13 from Andy Furniss <adf.lists@gmail.com> ---
Also fixes for me.

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[Bug 98751] radeon: multihead "no signal" on one of the monitors - regression

[bugzilla-daemon]

https://bugzilla.kernel.org/show_bug.cgi?id=98751

--- Comment #14 from Thomas <v10lator@myway.de> ---
@Alex Deucher: For Bug #98651 it helps: There's a image. But HDMI-Audio isn't
working (which it did prior to the bug).

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[Bug 98751] radeon: multihead "no signal" on one of the monitors - regression

[bugzilla-daemon]

https://bugzilla.kernel.org/show_bug.cgi?id=98751

--- Comment #15 from Thomas <v10lator@myway.de> ---
Summary for Bug #98651

Kernel 4.0.2: HDMI image and audio working.
Kernel 4.0.3 and upward: No HDMI.
Kernel 4.0.4 with commit d5c3b64b9618214a5443c57c64511ab5fa599cec reverted:
HDMI image works, audio does not.
Kernel 4.0.4 with attachment 178001: HDMI image works, audio does not.

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[Bug 98751] radeon: multihead "no signal" on one of the monitors - regression

[bugzilla-daemon]

https://bugzilla.kernel.org/show_bug.cgi?id=98751

--- Comment #16 from Alex Deucher <alexdeucher@gmail.com> ---
(In reply to Thomas from comment #15)
> Summary for Bug #98651
> 
> Kernel 4.0.2: HDMI image and audio working.
> Kernel 4.0.3 and upward: No HDMI.
> Kernel 4.0.4 with commit d5c3b64b9618214a5443c57c64511ab5fa599cec reverted:
> HDMI image works, audio does not.
> Kernel 4.0.4 with attachment 178001 [details]: HDMI image works, audio does
> not.

Can you bisect when audio stopped working and open a new bug?

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[Bug 98751] radeon: multihead "no signal" on one of the monitors - regression

[bugzilla-daemon]

https://bugzilla.kernel.org/show_bug.cgi?id=98751

--- Comment #17 from Thomas <v10lator@myway.de> ---
@Alex Deucher there you go: https://bugzilla.kernel.org/show_bug.cgi?id=99041

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[Bug 98751] radeon: multihead "no signal" on one of the monitors - regression

[bugzilla-daemon]

https://bugzilla.kernel.org/show_bug.cgi?id=98751

--- Comment #18 from Thomas <v10lator@myway.de> ---
*** Bug 98651 has been marked as a duplicate of this bug. ***

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[Bug 98751] radeon: multihead "no signal" on one of the monitors - regression

[bugzilla-daemon]

https://bugzilla.kernel.org/show_bug.cgi?id=98751

--- Comment #19 from Robin Bankhead <kernel@headbank.co.uk> ---
(In reply to Alex Deucher from comment #10)
> Created attachment 178001 [details]
> possible fix
> 
> Does the attached patch help?

Nope, just built 4.0.5-gentoo which has this patch applied, laptop LCD still
goes dark when radeondrmfb takes over from simplefb (or around that point, when
the display would normally flicker at the changeover).

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[Bug 98751] radeon: multihead "no signal" on one of the monitors - regression

[bugzilla-daemon]

https://bugzilla.kernel.org/show_bug.cgi?id=98751

--- Comment #20 from Robin Bankhead <kernel@headbank.co.uk> ---
Created attachment 179891
  --> https://bugzilla.kernel.org/attachment.cgi?id=179891&action=edit
dmesg from linux-4.0.5-gentoo on PALM/Wrestler APU

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[Bug 98751] radeon: multihead "no signal" on one of the monitors - regression

[bugzilla-daemon]

https://bugzilla.kernel.org/show_bug.cgi?id=98751

--- Comment #21 from Robin Bankhead <kernel@headbank.co.uk> ---
APU model name:
AMD E2-1800 APU with Radeon(tm) HD Graphics

PCI ID:
00:01.0 VGA compatible controller: Advanced Micro Devices, Inc. [AMD/ATI]
Wrestler [Radeon HD 7340]

Reverting the commit in OP solves it for me.

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