[Bug 106949] Mandatory amdgpu DC on Polaris

[Bug 106949] Mandatory amdgpu DC on Polaris

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https://bugs.freedesktop.org/show_bug.cgi?id=106949

            Bug ID: 106949
           Summary: Mandatory amdgpu DC on Polaris
           Product: DRI
           Version: XOrg git
          Hardware: Other
                OS: All
            Status: NEW
          Severity: normal
          Priority: medium
         Component: DRM/AMDgpu
          Assignee: dri-devel@lists.freedesktop.org
          Reporter: terapy-session@bk.ru

After disabling AMDGPU DC on my RX460, my Arch does not load. It was shown on
4.16.13 and earlier, and is now on new 4.17.2. Inclusion should be mandatory
for Vega and Raven Ridge, but not Polaris.

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[Bug 106949] Mandatory amdgpu DC on Polaris

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https://bugs.freedesktop.org/show_bug.cgi?id=106949

--- Comment #1 from Michel Dänzer <michel@daenzer.net> ---
It's a bit unclear what you're saying. Disabling DC (via amdgpu.dc=0?) worked
with 4.16.13, but doesn't anymore with 4.17.2?

Please attach the dmesg output from a good case and if possible from a bad
case.

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[Bug 106949] Mandatory amdgpu DC on Polaris

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https://bugs.freedesktop.org/show_bug.cgi?id=106949

--- Comment #2 from Dmitry <terapy-session@bk.ru> ---
Almost. The shutdown did not work on 4.16.13 and earlier. And there is now on
my fresh 4.17.2. Disable by removing amdgpu.dc=1 of the string.

P.S. I noticed that there is a bug and when you disable TearFree in the config.

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[Bug 106949] Mandatory amdgpu DC on Polaris

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https://bugs.freedesktop.org/show_bug.cgi?id=106949

--- Comment #3 from Dmitry <terapy-session@bk.ru> ---
Created attachment 140192
  --> https://bugs.freedesktop.org/attachment.cgi?id=140192&action=edit
dmesg

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[Bug 106949] Mandatory amdgpu DC on Polaris

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https://bugs.freedesktop.org/show_bug.cgi?id=106949

--- Comment #4 from Michel Dänzer <michel@daenzer.net> ---
(In reply to Dmitry from comment #2)
> Almost. The shutdown did not work on 4.16.13 and earlier. And there is now
> on my fresh 4.17.2.

What is there now?


> Disable by removing amdgpu.dc=1 of the string.

DC is enabled by default as of 4.17, you have to explicitly disable it with
amdgpu.dc=0.


> P.S. I noticed that there is a bug and when you disable TearFree in the
> config.

Please file a separate report about that against product xorg, component
Driver/AMDgpu.

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[Bug 106949] Mandatory amdgpu DC on Polaris

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https://bugs.freedesktop.org/show_bug.cgi?id=106949

--- Comment #5 from Dmitry <terapy-session@bk.ru> ---
>> What is there now?

Same thing. The system is not loaded beyond the point "Reached target graphic
Interface". But there is one point, helps pressing Enter, sometimes two
presses.

>> DC is enabled by default as of 4.17, you have to explicitly disable it with amdgpu.dc=0.
I understood the update meant that it was no longer necessary to specify
startup parameters such as amdgpu.dc=1. Tried with amdgpu.dc=0, but the same
problem.

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[Bug 106949] Mandatory amdgpu DC on Polaris

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https://bugs.freedesktop.org/show_bug.cgi?id=106949

--- Comment #6 from Dmitry <terapy-session@bk.ru> ---
Found out that this bug with SDDM which I use. It is happening because of a
change in configuration or any other reason.

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[Bug 106949] Mandatory amdgpu DC on Polaris

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https://bugs.freedesktop.org/show_bug.cgi?id=106949

Dmitry <terapy-session@bk.ru> changed:

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

--- Comment #7 from Dmitry <terapy-session@bk.ru> ---
Sorry. Indeed the problem was on the SDDM side. Decided to install haveged.

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