7840U amdgpu MMVM_L2_PROTECTION_FAULT_STATUS

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I have a Framework 13 with a 7840U and started having massive GPU
driver issues a few weeks ago (including system freezes).
Unfortunately the information of when exactly this started to happen
is gone, but It should be somewhere in between 6.6.0 and 6.7.4.
I got many different and random dmesg-errors and system behaviors, but
I currently can only reproduce one, so let's focus on that for now.

First some basic info:
I'm on Arch Linux using the `linux` kernel package.(currently at 6.7.4).
I have an external monitor connected via a thinkpad thunderbolt 4 dock.
I am using amdgpu.sg_display=0 and VRAM sharing is configured to
UMA_GAME_OPTIMIZED in the firmware settings.

If I start playing a youtube video in firefox with hardware
acceleration enabled, it stutters until it stops playing after a few
seconds. I can see this in the kernel log. I see this multiple times
for many different addresses.
[ 5641.070540] amdgpu 0000:c1:00.0: amdgpu: [mmhub] page fault
(src_id:0 ring:40 vmid:1 pasid:32786, for process RDD Process pid 3680
thread firefox-bi:cs0 pid 3852)
[ 5641.070549] amdgpu 0000:c1:00.0: amdgpu:   in page starting at
address 0x0000000000020000 from client 18
[ 5641.070553] amdgpu 0000:c1:00.0: amdgpu:
MMVM_L2_PROTECTION_FAULT_STATUS:0x00143A51
[ 5641.070556] amdgpu 0000:c1:00.0: amdgpu:      Faulty UTCL2 client
ID: unknown (0x1d)
[ 5641.070559] amdgpu 0000:c1:00.0: amdgpu:      MORE_FAULTS: 0x1
[ 5641.070561] amdgpu 0000:c1:00.0: amdgpu:      WALKER_ERROR: 0x0
[ 5641.070563] amdgpu 0000:c1:00.0: amdgpu:      PERMISSION_FAULTS: 0x5
[ 5641.070565] amdgpu 0000:c1:00.0: amdgpu:      MAPPING_ERROR: 0x0
[ 5641.070567] amdgpu 0000:c1:00.0: amdgpu:      RW: 0x1

Thanks
Michael




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