[Bug 92836] amdgpu does not resume properly from suspend

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=92836

            Bug ID: 92836
           Summary: amdgpu does not resume properly from suspend
           Product: DRI
           Version: XOrg git
          Hardware: x86-64 (AMD64)
                OS: Linux (All)
            Status: NEW
          Severity: normal
          Priority: medium
         Component: DRM/AMDgpu
          Assignee: dri-devel at lists.freedesktop.org
          Reporter: David at WalkerStreet.info

My laptop does not resume properly after a suspend.  The problem seems to be
with the amdgpu kernel module; it's often accompanied by a long stream of dmesg
errors reported.  Here's a sampling:

 [ 1494.980561] amdgpu 0000:00:01.0: GPU fault detected: 146 0x0b020504
 [ 1494.980561] amdgpu 0000:00:01.0:   VM_CONTEXT1_PROTECTION_FAULT_ADDR  
0x00000000
 [ 1494.980561] amdgpu 0000:00:01.0:   VM_CONTEXT1_PROTECTION_FAULT_STATUS
0x00000000
 [ 1494.980561] VM fault (0x00, vmid 0) at page 0, read from '' (0x00000000)
(0)
 [ 1494.995478] systemd-journald[498]: /dev/kmsg buffer overrun, some messages
lost.
 [ 1494.980561] amdgpu 0000:00:01.0: GPU fault detected: 146 0x0b0a4004
 [ 1494.980561] amdgpu 0000:00:01.0:   VM_CONTEXT1_PROTECTION_FAULT_ADDR  
0x00000000
 [ 1494.980561] amdgpu 0000:00:01.0:   VM_CONTEXT1_PROTECTION_FAULT_STATUS
0x00000000
 [ 1494.980561] VM fault (0x00, vmid 0) at page 0, read from '' (0x00000000)
(0)
 [ 1494.995486] systemd-journald[498]: /dev/kmsg buffer overrun, some messages
lost.

Any ideas?  I'm running the 4.2.4-1-default under openSUSE Tumbleweed.  Here's
some hwinfo data:

 09: PCI 01.0: 0300 VGA compatible controller (VGA)              
  [Created at pci.366]
  Unique ID: vSkL.bMI5Iw7ysWD
  SysFS ID: /devices/pci0000:00/0000:00:01.0
  SysFS BusID: 0000:00:01.0
  Hardware Class: graphics card
  Model: "ATI Carrizo"
  Vendor: pci 0x1002 "ATI Technologies Inc"
  Device: pci 0x9874 "Carrizo"
  SubVendor: pci 0x103c "Hewlett-Packard Company"
  SubDevice: pci 0x80af 
  Revision: 0xc5
  Driver: "amdgpu"
  Driver Modules: "drm"
  Memory Range: 0xe0000000-0xefffffff (ro,non-prefetchable)
  Memory Range: 0xf0000000-0xf07fffff (ro,non-prefetchable)
  I/O Ports: 0xf000-0xf0ff (rw)
  Memory Range: 0xff700000-0xff73ffff (rw,non-prefetchable)
  Memory Range: 0xff740000-0xff75ffff (ro,non-prefetchable,disabled)
  IRQ: 47 (129945 events)
  Module Alias: "pci:v00001002d00009874sv0000103Csd000080AFbc03sc00i00"
  Driver Info #0:
    Driver Status: amdgpu is active
    Driver Activation Cmd: "modprobe amdgpu"
  Config Status: cfg=new, avail=yes, need=no, active=unknown

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