[Bug 109384] Bad DisplayPort enumeration and wrong refresh rate with Hawaii chip

[Bug 109384] Bad DisplayPort enumeration and wrong refresh rate with Hawaii chip

[bugzilla-daemon]

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https://bugs.freedesktop.org/show_bug.cgi?id=109384

            Bug ID: 109384
           Summary: Bad DisplayPort enumeration and wrong refresh rate
                    with Hawaii chip
           Product: DRI
           Version: DRI git
          Hardware: x86-64 (AMD64)
                OS: Linux (All)
            Status: NEW
          Severity: normal
          Priority: medium
         Component: DRM/AMDgpu
          Assignee: dri-devel@lists.freedesktop.org
          Reporter: fabio0x@keemail.me

Created attachment 143150
  --> https://bugs.freedesktop.org/attachment.cgi?id=143150&action=edit
Xorg.0 log with DC off

I'm running Solus KDE with kernel 4.20.2 but I've had these issues since kernel
4.19. Here's the list of issues with AMDGPU DC enabled:
- With Solus' default kernel flags I have wrong DisplayPort enumeration,
meaning that I get DisplayPort-1 when I turn on the computer, and then
DisplayPort-2 when I get my monitor to sleep and then I wake it up.
- If I put my computer on sleep (suspension) and then wake it up, I cannot set
a usable refresh rate. This means I actually get 40 Hz when I set 60, and 45 Hz
when I set 74 (yeah, I have a bit of screen "overclocking". That's how I found
DisplayPort enumeration is wrong).
- I get microstuttering, particularly noticeable when I drag windows around.

Now, all these issues are non existant if I set the amdgpu.dc=0 kernel flag.
Also, DisplayPort number is DisplayPort-0 under any circumstances.

❯ inxi -G
Graphics:  Device-1: AMD Hawaii PRO [Radeon R9 290/390] driver: amdgpu v:
kernel 
           Display: x11 server: X.Org 1.20.3 driver: amdgpu,ati unloaded:
fbdev,modesetting,vesa 
           resolution: 1920x1080~60Hz 
           OpenGL: 
           renderer: AMD Radeon R9 200 Series (HAWAII DRM 3.27.0
4.20.2-107.current LLVM 7.0.0) 
           v: 4.5 Mesa 18.3.1

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[Bug 109384] Bad DisplayPort enumeration and wrong refresh rate with Hawaii chip

[bugzilla-daemon]

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https://bugs.freedesktop.org/show_bug.cgi?id=109384

--- Comment #1 from fabio0x@keemail.me ---
Created attachment 143151
  --> https://bugs.freedesktop.org/attachment.cgi?id=143151&action=edit
Xorg.1 log with DC off

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[Bug 109384] Bad DisplayPort enumeration and wrong refresh rate with Hawaii chip

[bugzilla-daemon]

[-- Attachment #1.1: Type: text/plain, Size: 300 bytes --]

https://bugs.freedesktop.org/show_bug.cgi?id=109384

--- Comment #2 from fabio0x@keemail.me ---
Created attachment 143152
  --> https://bugs.freedesktop.org/attachment.cgi?id=143152&action=edit
Xorg.0 log with DC on

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[Bug 109384] Bad DisplayPort enumeration and wrong refresh rate with Hawaii chip

[bugzilla-daemon]

[-- Attachment #1.1: Type: text/plain, Size: 300 bytes --]

https://bugs.freedesktop.org/show_bug.cgi?id=109384

--- Comment #3 from fabio0x@keemail.me ---
Created attachment 143153
  --> https://bugs.freedesktop.org/attachment.cgi?id=143153&action=edit
Xorg.1 log with DC on

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[Bug 109384] Bad DisplayPort enumeration and wrong refresh rate with Hawaii chip

[bugzilla-daemon]

[-- Attachment #1.1: Type: text/plain, Size: 296 bytes --]

https://bugs.freedesktop.org/show_bug.cgi?id=109384

--- Comment #4 from fabio0x@keemail.me ---
Created attachment 143154
  --> https://bugs.freedesktop.org/attachment.cgi?id=143154&action=edit
dmesh with DC off

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[Bug 109384] Bad DisplayPort enumeration and wrong refresh rate with Hawaii chip

[bugzilla-daemon]

[-- Attachment #1.1: Type: text/plain, Size: 295 bytes --]

https://bugs.freedesktop.org/show_bug.cgi?id=109384

--- Comment #5 from fabio0x@keemail.me ---
Created attachment 143155
  --> https://bugs.freedesktop.org/attachment.cgi?id=143155&action=edit
dmesg with DC on

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[Bug 109384] Bad DisplayPort enumeration and wrong refresh rate with Hawaii chip

[bugzilla-daemon]

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https://bugs.freedesktop.org/show_bug.cgi?id=109384

fabio0x@keemail.me changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
 Attachment #143154|dmesh with DC off           |dmesg with DC off
        description|                            |

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[Bug 109384] Bad DisplayPort enumeration and wrong refresh rate with Hawaii chip

[bugzilla-daemon]

[-- Attachment #1.1: Type: text/plain, Size: 668 bytes --]

https://bugs.freedesktop.org/show_bug.cgi?id=109384

Michel Dänzer <michel@daenzer.net> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |harry.wentland@amd.com,
                   |                            |nicholas.kazlauskas@amd.com

--- Comment #6 from Michel Dänzer <michel@daenzer.net> ---
(In reply to fabio0x from comment #0)
> - I get microstuttering, particularly noticeable when I drag windows around.

See bug 106175.

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[Bug 109384] Bad DisplayPort enumeration and wrong refresh rate with Hawaii chip

[bugzilla-daemon]

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https://bugs.freedesktop.org/show_bug.cgi?id=109384

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

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

--- Comment #7 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/675.

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