[Bug 105733] Amdgpu randomly hangs and only ssh works. Mouse cursor moves sometimes but does nothing. Keyboard stops working.

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=105733

--- Comment #4 from Allan <allan4229 at gmail.com> ---
If you set amdgpu.dc=1 as a boot parameter and then try openning pavucontrol,
the screen hungs with artifacts (mouse cursor keeps moving) and you get this
error :


```
[  125.640254] amdgpu 0000:0e:00.0: GPU fault detected: 147 0x04f00402
[  125.640259] amdgpu 0000:0e:00.0:   VM_CONTEXT1_PROTECTION_FAULT_ADDR  
0x001C389E
[  125.640262] amdgpu 0000:0e:00.0:   VM_CONTEXT1_PROTECTION_FAULT_STATUS
0x04004002
[  125.640264] amdgpu 0000:0e:00.0: VM fault (0x02, vmid 2) at page 1849502,
read from 'TC1' (0x54433100) (4)
[  125.640641] amdgpu 0000:0e:00.0: GPU fault detected: 147 0x05004802
[  125.640643] amdgpu 0000:0e:00.0:   VM_CONTEXT1_PROTECTION_FAULT_ADDR  
0x001C38A0
[  125.640644] amdgpu 0000:0e:00.0:   VM_CONTEXT1_PROTECTION_FAULT_STATUS
0x04048002
[  125.640646] amdgpu 0000:0e:00.0: VM fault (0x02, vmid 2) at page 1849504,
read from 'TC4' (0x54433400) (72)
```

I'm using kernel 4.15.

Then when you request a poweroff from ssh the call trace appears again and
hungs the system, then you have to do a hard reset.

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