[Bug 94900] Regression: HD6950 GPU lockup with octodad: dadliest catch

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=94900

            Bug ID: 94900
           Summary: Regression: HD6950 GPU lockup with octodad: dadliest
                    catch
           Product: DRI
           Version: unspecified
          Hardware: Other
                OS: All
            Status: NEW
          Severity: normal
          Priority: medium
         Component: DRM/Radeon
          Assignee: dri-devel at lists.freedesktop.org
          Reporter: dan.g.tob at gmail.com

Created attachment 122873
  --> https://bugs.freedesktop.org/attachment.cgi?id=122873&action=edit
dmesg

I Am seeing gpu lockups trying to launch octodad: dadliest catch with a radeon
HD6950 on steam. It was working before but its been a few months since I've
last tried to launch it. Both mesa and kernel have been updated since it was
last working.
kernel 4.4->4.5  mesa 11.1->11.2. Possibly libdrm updates too.

[  267.335354] radeon 0000:02:00.0: ring 0 stalled for more than 10416msec
[  267.335364] radeon 0000:02:00.0: GPU lockup (current fence id
0x000000000000821e last fence id 0x0000000000008229 on ring 0)
[  267.444949] radeon 0000:02:00.0: Saved 335 dwords of commands on ring 0.
[  267.445029] radeon 0000:02:00.0: GPU softreset: 0x00000009
[  267.445031] radeon 0000:02:00.0:   GRBM_STATUS               = 0xE77E4828
[  267.445032] radeon 0000:02:00.0:   GRBM_STATUS_SE0           = 0xFF800001
[  267.445033] radeon 0000:02:00.0:   GRBM_STATUS_SE1           = 0xFF800001
[  267.445034] radeon 0000:02:00.0:   SRBM_STATUS               = 0x200000C0
[  267.445101] radeon 0000:02:00.0:   SRBM_STATUS2              = 0x00000000
[  267.445102] radeon 0000:02:00.0:   R_008674_CP_STALLED_STAT1 = 0x00000000
[  267.445103] radeon 0000:02:00.0:   R_008678_CP_STALLED_STAT2 = 0x00018000
[  267.445104] radeon 0000:02:00.0:   R_00867C_CP_BUSY_STAT     = 0x00008006
[  267.445106] radeon 0000:02:00.0:   R_008680_CP_STAT          = 0x80038647
[  267.445107] radeon 0000:02:00.0:   R_00D034_DMA_STATUS_REG   = 0x44C83D57
[  267.445108] radeon 0000:02:00.0:   R_00D834_DMA_STATUS_REG   = 0x44C83D57
[  267.445109] radeon 0000:02:00.0:   VM_CONTEXT0_PROTECTION_FAULT_ADDR  
0x00000000
[  267.445111] radeon 0000:02:00.0:   VM_CONTEXT0_PROTECTION_FAULT_STATUS
0x00000000
[  267.445112] radeon 0000:02:00.0:   VM_CONTEXT1_PROTECTION_FAULT_ADDR  
0x00000000
[  267.445113] radeon 0000:02:00.0:   VM_CONTEXT1_PROTECTION_FAULT_STATUS
0x00000000
[  267.461656] radeon 0000:02:00.0: GRBM_SOFT_RESET=0x0000DF7B
[  267.461709] radeon 0000:02:00.0: SRBM_SOFT_RESET=0x00000100
[  267.462863] radeon 0000:02:00.0:   GRBM_STATUS               = 0x00003828
[  267.462864] radeon 0000:02:00.0:   GRBM_STATUS_SE0           = 0x00000007
[  267.462866] radeon 0000:02:00.0:   GRBM_STATUS_SE1           = 0x00000007
[  267.462867] radeon 0000:02:00.0:   SRBM_STATUS               = 0x200000C0
[  267.462933] radeon 0000:02:00.0:   SRBM_STATUS2              = 0x00000000
[  267.462934] radeon 0000:02:00.0:   R_008674_CP_STALLED_STAT1 = 0x00000000
[  267.462935] radeon 0000:02:00.0:   R_008678_CP_STALLED_STAT2 = 0x00000000
[  267.462937] radeon 0000:02:00.0:   R_00867C_CP_BUSY_STAT     = 0x00000000
[  267.462938] radeon 0000:02:00.0:   R_008680_CP_STAT          = 0x00000000
[  267.462939] radeon 0000:02:00.0:   R_00D034_DMA_STATUS_REG   = 0x44C83D57
[  267.462940] radeon 0000:02:00.0:   R_00D834_DMA_STATUS_REG   = 0x44C83D57
[  267.463016] radeon 0000:02:00.0: GPU reset succeeded, trying to resume

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