[Bug 105500] AMD Richland (ARUBA) no screen at DP output when using three displays

[bugzilla-daemon]

https://bugs.freedesktop.org/show_bug.cgi?id=105500

Martin Peres  changed:

   What|Removed |Added

 Resolution|--- |MOVED
 Status|NEW |RESOLVED

--- Comment #6 from Martin Peres  ---
-- 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/844.

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[Bug 105500] AMD Richland (ARUBA) no screen at DP output when using three displays

[bugzilla-daemon]

https://bugs.freedesktop.org/show_bug.cgi?id=105500

--- Comment #5 from Balázs Vinarz  ---
GCN2 based APUs are not affected with none AMDGPU or Radeon kernel modules.

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[Bug 105500] AMD Richland (ARUBA) no screen at DP output when using three displays

[bugzilla-daemon]

https://bugs.freedesktop.org/show_bug.cgi?id=105500

--- Comment #3 from Balázs Vinarz  ---
Created attachment 138097
  --> https://bugs.freedesktop.org/attachment.cgi?id=138097=edit
Xorg.0.log

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[Bug 105500] AMD Richland (ARUBA) no screen at DP output when using three displays

[bugzilla-daemon]

https://bugs.freedesktop.org/show_bug.cgi?id=105500

--- Comment #4 from Balázs Vinarz  ---
Created attachment 138098
  --> https://bugs.freedesktop.org/attachment.cgi?id=138098=edit
xrandr

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[Bug 105500] AMD Richland (ARUBA) no screen at DP output when using three displays

[bugzilla-daemon]

https://bugs.freedesktop.org/show_bug.cgi?id=105500

--- Comment #2 from Balázs Vinarz  ---
Created attachment 138096
  --> https://bugs.freedesktop.org/attachment.cgi?id=138096=edit
glxinfo

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[Bug 105500] AMD Richland (ARUBA) no screen at DP output when using three displays

[bugzilla-daemon]

https://bugs.freedesktop.org/show_bug.cgi?id=105500

--- Comment #1 from Balázs Vinarz  ---
Created attachment 138095
  --> https://bugs.freedesktop.org/attachment.cgi?id=138095=edit
dmidecode

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[Bug 105500] AMD Richland (ARUBA) no screen at DP output when using three displays

[bugzilla-daemon]

https://bugs.freedesktop.org/show_bug.cgi?id=105500

Bug ID: 105500
   Summary: AMD Richland (ARUBA) no screen at DP output when using
three displays
   Product: DRI
   Version: unspecified
  Hardware: x86-64 (AMD64)
OS: Linux (All)
Status: NEW
  Severity: major
  Priority: medium
 Component: DRM/Radeon
  Assignee: dri-devel@lists.freedesktop.org
  Reporter: viniba...@gmail.com

Created attachment 138094
  --> https://bugs.freedesktop.org/attachment.cgi?id=138094=edit
dmesg

Hello there!

After connecting and enabling the 3rd monitor in D-Sub, the one with DP becames
black. Most of the time I use 2 displays with (DVI-I and DP) without any
problem. The desired layout is the following, however I even tried to use HDMI
instead of DVI-I:
 ___  __  __
|DVI||DP||DS|
  21  3

 __  __  
|DS||DP||HDMI|
  2   1   3

None of the options are working, however it's fine on Windows using the lastest
- official beta - Crimson Edition 15.7.1.
The motherboard had an ASMedia ASM1445 DVI/HDMI bridge, so I couldn't use these
outputs at the same time.

CPU: AMD A8-6500
GPU: AMD Radeon HD8570 (ATOMBIOSBK-AMD VER015.031.000.000.00,
02/17/13,02:36:07)
MOBO: ASUS F2A85M-PRO (BIOS 6601)
OS: Arch Linux 4.13 AMD64
xf86-video-ati 1:18.0.0-1
xorg-server 1.19.6+13+gd0d1a694f-1

The logs/outputs were saved at 4.13, however it's not working with both the
up-to-date Arch (4.15) and Xubuntu 18.04 beta.

Thank you

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