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    <head>
      <base href="https://bugs.freedesktop.org/">
    </head>
    <body><table border="1" cellspacing="0" cellpadding="8">
        <tr>
          <th>Bug ID</th>
          <td><a class="bz_bug_link 
          bz_status_NEW "
   title="NEW - [Vega10] GPU lockup on boot: VMC page fault"
   href="https://bugs.freedesktop.org/show_bug.cgi?id=105251">105251</a>
          </td>
        </tr>

        <tr>
          <th>Summary</th>
          <td>[Vega10]  GPU lockup on boot: VMC page fault
          </td>
        </tr>

        <tr>
          <th>Product</th>
          <td>DRI
          </td>
        </tr>

        <tr>
          <th>Version</th>
          <td>DRI git
          </td>
        </tr>

        <tr>
          <th>Hardware</th>
          <td>Other
          </td>
        </tr>

        <tr>
          <th>OS</th>
          <td>Linux (All)
          </td>
        </tr>

        <tr>
          <th>Status</th>
          <td>NEW
          </td>
        </tr>

        <tr>
          <th>Severity</th>
          <td>blocker
          </td>
        </tr>

        <tr>
          <th>Priority</th>
          <td>medium
          </td>
        </tr>

        <tr>
          <th>Component</th>
          <td>DRM/AMDgpu
          </td>
        </tr>

        <tr>
          <th>Assignee</th>
          <td>dri-devel@lists.freedesktop.org
          </td>
        </tr>

        <tr>
          <th>Reporter</th>
          <td>ssorgatem@gmail.com
          </td>
        </tr></table>
      <p>
        <div>
        <pre>Happens on linux > 4.16 (also on the amd-staging-4.17-wip) but not on 4.15

Here are the relevant lines from dmesg:

[   33.835186] amdgpu 0000:26:00.0: [gfxhub] VMC page fault (src_id:0 ring:158
vmid:1 pas_id:0)
[   33.835188] amdgpu 0000:26:00.0:   at page 0x0000000100000000 from 27
[   33.835189] amdgpu 0000:26:00.0: VM_L2_PROTECTION_FAULT_STATUS:0x00000000
[   33.835193] amdgpu 0000:26:00.0: [gfxhub] VMC page fault (src_id:0 ring:158
vmid:1 pas_id:0)
[   33.835195] amdgpu 0000:26:00.0:   at page 0x0000000100000000 from 27
[   33.835196] amdgpu 0000:26:00.0: VM_L2_PROTECTION_FAULT_STATUS:0x00000000
[   33.835200] amdgpu 0000:26:00.0: [gfxhub] VMC page fault (src_id:0 ring:158
vmid:1 pas_id:0)
[   33.835202] amdgpu 0000:26:00.0:   at page 0x0000000100000000 from 27
[   33.835203] amdgpu 0000:26:00.0: VM_L2_PROTECTION_FAULT_STATUS:0x00000000
[   33.835207] amdgpu 0000:26:00.0: [gfxhub] VMC page fault (src_id:0 ring:158
vmid:1 pas_id:0)
[   33.835208] amdgpu 0000:26:00.0:   at page 0x0000000100000000 from 27
[   33.835210] amdgpu 0000:26:00.0: VM_L2_PROTECTION_FAULT_STATUS:0x00000000
[   33.835214] amdgpu 0000:26:00.0: [gfxhub] VMC page fault (src_id:0 ring:158
vmid:1 pas_id:0)
[   33.835215] amdgpu 0000:26:00.0:   at page 0x0000000100000000 from 27
[   33.835217] amdgpu 0000:26:00.0: VM_L2_PROTECTION_FAULT_STATUS:0x00000000
[   33.835220] amdgpu 0000:26:00.0: [gfxhub] VMC page fault (src_id:0 ring:158
vmid:1 pas_id:0)
[   33.835222] amdgpu 0000:26:00.0:   at page 0x0000000100000000 from 27
[   33.835223] amdgpu 0000:26:00.0: VM_L2_PROTECTION_FAULT_STATUS:0x00000000
[   33.835227] amdgpu 0000:26:00.0: [gfxhub] VMC page fault (src_id:0 ring:158
vmid:1 pas_id:0)
[   33.835229] amdgpu 0000:26:00.0:   at page 0x0000000100000000 from 27
[   33.835230] amdgpu 0000:26:00.0: VM_L2_PROTECTION_FAULT_STATUS:0x00000000
[   33.835234] amdgpu 0000:26:00.0: [gfxhub] VMC page fault (src_id:0 ring:158
vmid:1 pas_id:0)
[   33.835235] amdgpu 0000:26:00.0:   at page 0x0000000100000000 from 27
[   33.835237] amdgpu 0000:26:00.0: VM_L2_PROTECTION_FAULT_STATUS:0x00000000
[   43.998837] [drm:amdgpu_job_timedout [amdgpu]] *ERROR* ring gfx timeout,
last signaled seq=6, last emitted seq=7
[   43.998848] [drm] No hardware hang detected. Did some blocks stall?</pre>
        </div>
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