Comment 4 for bug 1810546

Reproduced with Mainline kernel

wget -c https://kernel.ubuntu.com/~kernel-ppa/mainline/v4.20-rc4/linux-image-unsigned-4.20.0-042000rc4-generic_4.20.0-042000rc4.201812030528_amd64.deb https://kernel.ubuntu.com/~kernel-ppa/mainline/v4.20-rc4/linux-modules-4.20.0-042000rc4-generic_4.20.0-042000rc4.201812030528_amd64.deb

apt-get install linux*4.20*

New error message

[ 6891.737234] gmc_v9_0_process_interrupt: 14 callbacks suppressed
[ 6891.737240] amdgpu 0000:0a:00.0: [gfxhub] VMC page fault (src_id:0 ring:24 vmid:1 pasid:32768, for process Xorg pid 1741 thread amdgpu_cs:0 pid 1793)
[ 6891.737247] amdgpu 0000:0a:00.0: in page starting at address 0x0000000101300000 from 27
[ 6891.737250] amdgpu 0000:0a:00.0: VM_L2_PROTECTION_FAULT_STATUS:0x00101031
[ 6891.737259] amdgpu 0000:0a:00.0: [gfxhub] VMC page fault (src_id:0 ring:24 vmid:1 pasid:32768, for process Xorg pid 1741 thread amdgpu_cs:0 pid 1793)
[ 6891.737262] amdgpu 0000:0a:00.0: in page starting at address 0x0000000101300000 from 27
[ 6891.737265] amdgpu 0000:0a:00.0: VM_L2_PROTECTION_FAULT_STATUS:0x00000000
[ 6891.737274] amdgpu 0000:0a:00.0: [gfxhub] VMC page fault (src_id:0 ring:24 vmid:1 pasid:32768, for process Xorg pid 1741 thread amdgpu_cs:0 pid 1793)
[ 6891.737277] amdgpu 0000:0a:00.0: in page starting at address 0x0000000101300000 from 27
[ 6891.737279] amdgpu 0000:0a:00.0: VM_L2_PROTECTION_FAULT_STATUS:0x00000000
[ 6891.737287] amdgpu 0000:0a:00.0: [gfxhub] VMC page fault (src_id:0 ring:24 vmid:1 pasid:32768, for process Xorg pid 1741 thread amdgpu_cs:0 pid 1793)
[ 6891.737290] amdgpu 0000:0a:00.0: in page starting at address 0x0000000101301000 from 27
[ 6891.737293] amdgpu 0000:0a:00.0: VM_L2_PROTECTION_FAULT_STATUS:0x00000000
[ 6891.737301] amdgpu 0000:0a:00.0: [gfxhub] VMC page fault (src_id:0 ring:24 vmid:1 pasid:32768, for process Xorg pid 1741 thread amdgpu_cs:0 pid 1793)
[ 6891.737303] amdgpu 0000:0a:00.0: in page starting at address 0x0000000101300000 from 27
[ 6891.737306] amdgpu 0000:0a:00.0: VM_L2_PROTECTION_FAULT_STATUS:0x00000000
[ 6891.737314] amdgpu 0000:0a:00.0: [gfxhub] VMC page fault (src_id:0 ring:24 vmid:1 pasid:32768, for process Xorg pid 1741 thread amdgpu_cs:0 pid 1793)
[ 6891.737317] amdgpu 0000:0a:00.0: in page starting at address 0x0000000101301000 from 27
[ 6891.737319] amdgpu 0000:0a:00.0: VM_L2_PROTECTION_FAULT_STATUS:0x00000000
[ 6891.737327] amdgpu 0000:0a:00.0: [gfxhub] VMC page fault (src_id:0 ring:24 vmid:1 pasid:32768, for process Xorg pid 1741 thread amdgpu_cs:0 pid 1793)
[ 6891.737330] amdgpu 0000:0a:00.0: in page starting at address 0x0000000101300000 from 27
[ 6891.737332] amdgpu 0000:0a:00.0: VM_L2_PROTECTION_FAULT_STATUS:0x00000000
[ 6891.737340] amdgpu 0000:0a:00.0: [gfxhub] VMC page fault (src_id:0 ring:24 vmid:1 pasid:32768, for process Xorg pid 1741 thread amdgpu_cs:0 pid 1793)
[ 6891.737343] amdgpu 0000:0a:00.0: in page starting at address 0x0000000101301000 from 27
[ 6891.737345] amdgpu 0000:0a:00.0: VM_L2_PROTECTION_FAULT_STATUS:0x00000000
[ 6891.737353] amdgpu 0000:0a:00.0: [gfxhub] VMC page fault (src_id:0 ring:24 vmid:1 pasid:32768, for process Xorg pid 1741 thread amdgpu_cs:0 pid 1793)
[ 6891.737356] amdgpu 0000:0a:00.0: in page starting at address 0x0000000101302000 from 27
[ 6891.737358] amdgpu 0000:0a:00.0: VM_L2_PROTECTION_FAULT_STATUS:0x00000000
[ 6891.737366] amdgpu 0000:0a:00.0: [gfxhub] VMC page fault (src_id:0 ring:24 vmid:1 pasid:32768, for process Xorg pid 1741 thread amdgpu_cs:0 pid 1793)
[ 6891.737369] amdgpu 0000:0a:00.0: in page starting at address 0x0000000101302000 from 27
[ 6891.737372] amdgpu 0000:0a:00.0: VM_L2_PROTECTION_FAULT_STATUS:0x00000000
[ 6901.825330] [drm:amdgpu_job_timedout [amdgpu]] *ERROR* ring gfx timeout, signaled seq=667244, emitted seq=667245