[Bug 216840] New: AMDGPU trace message at boot

[Bug 216840] New: AMDGPU trace message at boot

[bugzilla-daemon]

https://bugzilla.kernel.org/show_bug.cgi?id=216840

            Bug ID: 216840
           Summary: AMDGPU trace message at boot
           Product: Drivers
           Version: 2.5
    Kernel Version: 6.1.0
          Hardware: AMD
                OS: Linux
              Tree: Mainline
            Status: NEW
          Severity: low
          Priority: P1
         Component: Video(DRI - non Intel)
          Assignee: drivers_video-dri@kernel-bugs.osdl.org
          Reporter: carlosalvatore@gmail.com
        Regression: No

Hi, 

I don't know whether this is important, but I'd like to know what is causing
this trace message: https://pastebin.pl/view/94557be6 when booting.

Hardware details:
- MB: ASUS M5A97 R2.0
- CPU: AMD FX-8350
- Kernel: 6.1.0
- GPU: Radeon HD 7970 (Tahiti) [Gigabyte GV-R797OC-3GD]

There are no critical problems when using the system. Other than HDMI port not
working anymore (I don't know if this is related. At some point HDMI stopped
working and I've got this message: "drm:detect_link_and_local_sink [amdgpu]]
*ERROR* No EDID read.", which I bypassed using a HDMI>DP adapter).

GRUB command line arguments are: 
amdgpu.si_support=1 radeon.si_support=0 modprobe.blacklist=radeon
amdgpu.vm_update_mode=3 amdgpu.dpm=1 amdgpu.dc=1 amd_iommu=on iommu=pt
video=DisplayPort-0:edid/1204x800.bin

Regards.

--
CarloSalvatore

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[Bug 216840] AMDGPU trace message at boot

[bugzilla-daemon]

https://bugzilla.kernel.org/show_bug.cgi?id=216840

Artem S. Tashkinov (aros@gmx.com) changed:

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

--- Comment #1 from Artem S. Tashkinov (aros@gmx.com) ---
Please look for dupes and if there are none file a new bug report here,

https://gitlab.freedesktop.org/drm/amd/-/issues

Thanks!

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[Bug 216840] AMDGPU trace message at boot

[bugzilla-daemon]

https://bugzilla.kernel.org/show_bug.cgi?id=216840

Alex Deucher (alexdeucher@gmail.com) changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |alexdeucher@gmail.com

--- Comment #2 from Alex Deucher (alexdeucher@gmail.com) ---
The trace is related to this option:
amdgpu.vm_update_mode=3
You should remove that.  In fact the following parameters shouldn't be needed:

amdgpu.vm_update_mode=3 - this should only be used for debugging GPUVM related
problems.

amdgpu.dpm=1 - this is the default

amdgpu.dc=1 - Does removing this fix the display issues with HDMI?

amd_iommu=on iommu=pt - IOMMU is enabled by default on most distros IIRC.

video=DisplayPort-0:edid/1204x800.bin - You shouldn't need this if the displays
are detected correctly.  Does removing amdgpu.dc=1 fix this?

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[Bug 216840] AMDGPU trace message at boot

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https://bugzilla.kernel.org/show_bug.cgi?id=216840

--- Comment #3 from Salvador Pérez (carlosalvatore@gmail.com) ---
Hi, Alex, 

I am afraid that not setting amdgpu.vm_update_mode=3 is not an option. If I try
to play Cities Skylines (linux native version), the game goes 1 fps and the
system is extremely sluggish. I need to switch to vt1 in order to regain
control and be able to reboot.

As far as I know, amdgpu.dpm=-1 (auto) is the default. However, I don't
remember why I set to 1 manually, I have to test.

HDMI port seems to be dead (or disabled), I cannot even see the BIOS screen, so
it is not a kernel issue.

Regards.

--
CarloSalvatore

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[Bug 216840] AMDGPU trace message at boot

[bugzilla-daemon]

https://bugzilla.kernel.org/show_bug.cgi?id=216840

--- Comment #4 from Alex Deucher (alexdeucher@gmail.com) ---
(In reply to Salvador Pérez from comment #3)
> Hi, Alex, 
> 
> I am afraid that not setting amdgpu.vm_update_mode=3 is not an option. If I
> try to play Cities Skylines (linux native version), the game goes 1 fps and
> the system is extremely sluggish. I need to switch to vt1 in order to regain
> control and be able to reboot.

In that case you likely have larger problems.  You should try and figure out
what's going on there.  As Artem suggested, open a bug at
https://gitlab.freedesktop.org/drm/amd/-/issues so we can figure out why GPU
page table updates are not working correctly.

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