[Bug 198883] amdgpu: carrizo: Screen stalls after starting X

[bugzilla-daemon@bugzilla.kernel.org]

https://bugzilla.kernel.org/show_bug.cgi?id=198883

--- Comment #59 from Ricardo Ribalda (ricardo.ribalda@gmail.com) ---
Hi Andrey

Testing with llvm7 setup:


R600_DEBUG=notiling,norbplus xinit

does not avoid the hang :(

[   31.200134] [drm:amdgpu_job_timedout [amdgpu]] *ERROR* ring gfx timeout,
last signaled seq=7, last emitted seq=8
[   31.200147] [drm] IP block:gfx_v8_0 is hung!
[   31.200152] [drm] GPU recovery disabled.



GALLIUM_DDEBUG=flush xinit

Seems to have a (good) impact. Hang happened after around 20 boots.

[   13.389894] NET: Registered protocol family 39
[   28.640142] [drm:amdgpu_job_timedout [amdgpu]] *ERROR* ring gfx timeout,
last signaled seq=652, last emitted seq=654
[   28.640154] [drm] IP block:gfx_v8_0 is hung!
[   28.640160] [drm] GPU recovery disabled.
[  246.752083] INFO: task amdgpu_cs:0:636 blocked for more than 120 seconds.
[  246.752092]       Not tainted 4.16.0-rc4-qtec-standard #1
[  246.752095] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this
message.
[  246.752099] amdgpu_cs:0     D    0   636    543 0x00080000
[  246.752099] amdgpu_cs:0     D    0   636    543 0x00080000
[  246.752103] Call Trace:
[  246.752115]  ? __schedule+0x25c/0x860
[  246.752122]  ? dma_fence_default_wait+0x10c/0x280
[  246.752124]  ? dma_fence_default_wait+0x1c8/0x280
[  246.752127]  schedule+0x2f/0x90
[  246.752130]  schedule_timeout+0x1f1/0x440
[  246.752220]  ? amdgpu_cs_bo_validate+0x7f/0x120 [amdgpu]
[  246.752276]  ? amdgpu_ttm_alloc_gart+0x5d/0x270 [amdgpu]
[  246.752284]  ? dma_fence_default_wait+0x10c/0x280
[  246.752287]  ? dma_fence_default_wait+0x1c8/0x280
[  246.752290]  dma_fence_default_wait+0x1f4/0x280
[  246.752294]  ? dma_fence_default_wait+0x280/0x280
[  246.752297]  dma_fence_wait_timeout+0x2e/0x100
[  246.752359]  amdgpu_ctx_wait_prev_fence+0x46/0x80 [amdgpu]
[  246.752418]  amdgpu_cs_ioctl+0x1f2/0x1af0 [amdgpu]
[  246.752478]  ? amdgpu_cs_find_mapping+0xe0/0xe0 [amdgpu]
[  246.752504]  drm_ioctl_kernel+0x59/0xb0 [drm]
[  246.752524]  drm_ioctl+0x29f/0x340 [drm]
[  246.752581]  ? amdgpu_cs_find_mapping+0xe0/0xe0 [amdgpu]
[  246.752630]  amdgpu_drm_ioctl+0x49/0x80 [amdgpu]
[  246.752635]  do_vfs_ioctl+0x8e/0x680
[  246.752641]  ? SyS_futex+0x11d/0x150
[  246.752644]  SyS_ioctl+0x74/0x80
[  246.752647]  ? get_vtime_delta+0xe/0x40
[  246.752650]  do_syscall_64+0x7b/0x1d0
[  246.752654]  entry_SYSCALL_64_after_hwframe+0x3d/0xa2
[  246.752658] RIP: 0033:0x3e292e57e7
[  246.752660] RSP: 002b:00007f17a2924b88 EFLAGS: 00000246 ORIG_RAX:
0000000000000010
[  246.752663] RAX: ffffffffffffffda RBX: 00007f17a2924c78 RCX:
0000003e292e57e7
[  246.752664] RDX: 00007f17a2924bf0 RSI: 00000000c0186444 RDI:
000000000000000d
[  246.752666] RBP: 00007f17a2924bf0 R08: 00007f17a2924ca0 R09:
00007f17a2924c78
[  246.752667] R10: 00007f17a2924ca0 R11: 0000000000000246 R12:
00000000c0186444
[  246.752668] R13: 000000000000000d R14: 0000000000d2c588 R15:
0000000000000002


kmscube git HEAD have not stalled after 50 attempts without any flag in
GALLIUM_DDEBUG or R600_DEBUG.

It might not be relevant, but my platform can only boot with BIOS (it is based
on coreboot). When you tried this bug did you tried with UEFI or BIOS?

Thanks

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