[Bug 49322] New: No picture on display connected via Displayport adaptor to HD 7870

[Bug 49322] New: No picture on display connected via Displayport adaptor to HD 7870

[bugzilla-daemon]

https://bugs.freedesktop.org/show_bug.cgi?id=49322

             Bug #: 49322
           Summary: No picture on display connected via Displayport
                    adaptor to HD 7870
    Classification: Unclassified
           Product: DRI
           Version: XOrg CVS
          Platform: x86-64 (AMD64)
        OS/Version: Linux (All)
            Status: NEW
          Severity: normal
          Priority: medium
         Component: DRM/Radeon
        AssignedTo: dri-devel@lists.freedesktop.org
        ReportedBy: briancschott@gmail.com


Created attachment 60820
  --> https://bugs.freedesktop.org/attachment.cgi?id=60820
dmesg output

Radeon HD 7870
mesa 8.0.2
Kernel 3.4-rc5
X.Org X Server 1.12.0
xf86-video-modesetting 0.2.0

* Monitor is a DVI monitor connected to an active mini-displayport to DVI
adaptor.
* Output to all three screens functions in Windows.
* dmesg output and xrandr output are able to see the display and print out the
correct supported resolutions
* HDMI and DVI output are functioning correctly on the card.
* Using xrandr I'm able to get the X server to think that the display is
present and functioning. (I can place windows and the cursor on the screen)
* The display is in power-saving mode from the moment that the framebuffer
console initializes. I'm not able to get any image on it.

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[Bug 49322] No picture on display connected via Displayport adaptor to HD 7870

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https://bugs.freedesktop.org/show_bug.cgi?id=49322

--- Comment #1 from Brian Schott <briancschott@gmail.com> 2012-05-11 21:27:21 PDT ---
I got tired of only being able to use ⅔ of my monitors, so I tried using the
integrated graphics (Intel hd4000 / ivy bridge) to power them. (Motherboard has
VGA, DVI, HDMI and full-size Displayport).

The odd thing I discovered is that the same monitor continues to not work. I've
eliminated the possibility of it being the DVI cable as I've tried two of them.
It's not the adaptor because the motherboard takes a full-size Displayport
adaptor and the HD7870 takes a mini-displayport.

Is there some code that is shared between the intel and radeon mode setting
drivers?

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[Bug 49322] No picture on display connected via Displayport adaptor to HD 7870

[bugzilla-daemon]

https://bugs.freedesktop.org/show_bug.cgi?id=49322

--- Comment #2 from Alex Deucher <agd5f@yahoo.com> 2012-05-12 04:56:36 PDT ---
Does the monitor come up at all?  E.g., is the bios able to light it up at boot
on either card?

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[Bug 49322] No picture on display connected via Displayport adaptor to HD 7870

[bugzilla-daemon]

https://bugs.freedesktop.org/show_bug.cgi?id=49322

--- Comment #3 from Brian Schott <briancschott@gmail.com> 2012-05-12 08:58:59 PDT ---
Yes. The system dual-boots Windows. During boot the first kernel messages show
up on both the HDMI monitor and the Displayport monitor, nothing on the DVI. As
soon as KMS kicks in, there's the expected 1920x1080 on the DVI and the HDMI,
but the Displayport goes black.

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[Bug 49322] No picture on display connected via Displayport adaptor to HD 7870

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https://bugs.freedesktop.org/show_bug.cgi?id=49322

--- Comment #4 from Brian Schott <briancschott@gmail.com> 2012-06-04 23:15:11 PDT ---
Still present in kernel 3.5-rc1

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[Bug 49322] No picture on display connected via Displayport adaptor to HD 7870

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https://bugs.freedesktop.org/show_bug.cgi?id=49322

--- Comment #5 from Kat <kat.amsterdam@gmail.com> ---
Still present in kernels 
3.19.0-031900rc4
3.13.0-44
3.13.0-43
3.13.0-30
3.13.0-29

Also happens with just the DVI-D connector as well. Black screen only way out
is with ALT+SysReq+REISUB

You can't even switch to TTY1-6 with CTRL+ALT+F1-F6

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[Bug 49322] No picture on display connected via Displayport adaptor to HD 7870

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https://bugs.freedesktop.org/show_bug.cgi?id=49322

Martin Peres <martin.peres@free.fr> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
         Resolution|---                         |MOVED
             Status|NEW                         |RESOLVED

--- Comment #6 from Martin Peres <martin.peres@free.fr> ---
-- GitLab Migration Automatic Message --

This bug has been migrated to freedesktop.org's GitLab instance and has been
closed from further activity.

You can subscribe and participate further through the new bug through this link
to our GitLab instance: https://gitlab.freedesktop.org/drm/amd/issues/265.

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