[Bug 71983] New: libdrm 2.4.49 makes gpu crash (HD7770)

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=71983

          Priority: medium
            Bug ID: 71983
          Assignee: dri-devel at lists.freedesktop.org
           Summary: libdrm 2.4.49 makes gpu crash (HD7770)
          Severity: normal
    Classification: Unclassified
                OS: All
          Reporter: arek.rusi at gmail.com
          Hardware: Other
            Status: NEW
           Version: git
         Component: Drivers/Gallium/radeonsi
           Product: Mesa

Created attachment 89740
  --> https://bugs.freedesktop.org/attachment.cgi?id=89740&action=edit
kernel log when i run some ogl apps (unigine-*;some 3d games; even
google-chrome)

I've gzipped log because it has ~ 14MB. 

main part are bazillion lines like that:
<3>[  414.876442] radeon 0000:01:00.0: GPU fault detected: 146 0x0fe32004
<3>[  414.876446] radeon 0000:01:00.0:   VM_CONTEXT1_PROTECTION_FAULT_ADDR  
0x000021FF
<3>[  414.876448] radeon 0000:01:00.0:   VM_CONTEXT1_PROTECTION_FAULT_STATUS
0x03020004
<4>[  414.876450] VM fault (0x04, vmid 1) at page 8703, write from CB (32)
<3>[  414.876455] radeon 0000:01:00.0: GPU fault detected: 146 0x0fc32004
<3>[  414.876457] radeon 0000:01:00.0:   VM_CONTEXT1_PROTECTION_FAULT_ADDR  
0x00000000
<3>[  414.876458] radeon 0000:01:00.0:   VM_CONTEXT1_PROTECTION_FAULT_STATUS
0x00000000
<4>[  414.876460] VM fault (0x00, vmid 0) at page 0, read from unknown (0)

Usually my PC doesn't respone but sometimes like for unigine-sanctuary i can
see graphics corruption for a while. When i downgrade libdrm everything works
like before.

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