[Bug 95298] Can't "connect" to external display attached to docking station via DP on laptop with Intel/AMD dual

[Bug 95298] Can't "connect" to external display attached to docking station via DP on laptop with Intel/AMD dual

[bugzilla-daemon]

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https://bugs.freedesktop.org/show_bug.cgi?id=95298

            Bug ID: 95298
           Summary: Can't "connect" to external display attached to
                    docking station via DP on laptop with Intel/AMD dual
           Product: DRI
           Version: XOrg git
          Hardware: x86-64 (AMD64)
                OS: Linux (All)
            Status: NEW
          Severity: normal
          Priority: medium
         Component: DRM/Radeon
          Assignee: dri-devel@lists.freedesktop.org
          Reporter: debian@onerussian.com

Created attachment 123520
  --> https://bugs.freedesktop.org/attachment.cgi?id=123520&action=edit
entire dmesg from the boot #1

I have HP zbook 14 and using Debian testing/unstable.  External monitor is
connected to docking station serving two DP connections.  To make those visible
to xrandr I do

xrandr --setprovideroffloadsink 1 0
xrandr --setprovideroutputsource 1 0

where 0 corresponds to Intel, 1 to Radeon/OLAND (name changed when upgraded).
Setup was working with stock debian packages (kernel was 4.4.2-3) for awhile
but there was an issue that display didn't refresh correctly and often I had
blank patches and had to go to gnome overview and back to re-render.  So I have
decided to upgrade to a current state of testing + some unstable.  Currently
have xserver-xorg-core 2:1.18.3-1  xserver-xorg-video-ati 1:7.7.0-1  and kernel
4.5.1-1 .  Unfortunately I can't "turn on" the external display connected to
the docking station -- screen blinks and comes back to display on the laptop,
xrandr reports xrandr: Configure crtc 4 failed   and agd5f on IRC looking at
http://www.onerussian.com/tmp/dmesg-20160506-1.txt (attached to this report as
well) summarized as "link training failed on the display"

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[Bug 95298] Can't "connect" to external display attached to docking station via DP on laptop with Intel/AMD dual

[bugzilla-daemon]

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https://bugs.freedesktop.org/show_bug.cgi?id=95298

--- Comment #1 from Alex Deucher <alexdeucher@gmail.com> ---
Does appending radeon.runpm=0 on the kernel command line in grub help?

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[Bug 95298] Can't "connect" to external display attached to docking station via DP on laptop with Intel/AMD dual

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https://bugs.freedesktop.org/show_bug.cgi?id=95298

--- Comment #2 from Alex Deucher <alexdeucher@gmail.com> ---
Did the monitor light up previously on a different kernel?  If so which one? 
Can you bisect?

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[Bug 95298] Can't "connect" to external display attached to docking station via DP on laptop with Intel/AMD dual

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https://bugs.freedesktop.org/show_bug.cgi?id=95298

--- Comment #3 from Yaroslav Halchenko <debian@onerussian.com> ---
prev kernel: 4.4.2-3  -- yes it connected/light up no problem.  I had 1 more
issue though (may be relevant).  When I come to work, and drop laptop into
docking station, if then external monitor immediately lights up in 'clone'
mode, I had to turn it off in xrandr/Displays, since otherwise whenever I run
my stock "enable external monitor, disable laptop" xrandr line the whole
display would go black without any signs of life from the laptop and I had to
reboot.  I have forgot if/where I had report on that issue.  If I turned it off
first in Gnome Display and then run xrandr to enable external in Primary mode
-- it worked fine.

runpm: I will try whenever free time emerges (later today/or monday)

bisection: if only nothing left for poor me.  This is the main workhorse
machine for me

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[Bug 95298] Can't "connect" to external display attached to docking station via DP on laptop with Intel/AMD dual

[bugzilla-daemon]

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https://bugs.freedesktop.org/show_bug.cgi?id=95298

otrebor <otrebor@swissonline.ch> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
           See Also|                            |https://bugs.freedesktop.or
                   |                            |g/show_bug.cgi?id=110629

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[Bug 95298] Can't "connect" to external display attached to docking station via DP on laptop with Intel/AMD dual

[bugzilla-daemon]

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https://bugs.freedesktop.org/show_bug.cgi?id=95298

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

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

--- Comment #4 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/718.

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