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      <base href="https://bugs.freedesktop.org/" />
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        <tr>
          <th>Priority</th>
          <td>medium
          </td>
        </tr>

        <tr>
          <th>Bug ID</th>
          <td><a class="bz_bug_link 
          bz_status_NEW "
   title="NEW --- - [Radeon] Blank screen after boot with kernel 3.12.x, xorg 1.15"
   href="https://bugs.freedesktop.org/show_bug.cgi?id=73848">73848</a>
          </td>
        </tr>

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

        <tr>
          <th>Summary</th>
          <td>[Radeon] Blank screen after boot with kernel 3.12.x, xorg 1.15
          </td>
        </tr>

        <tr>
          <th>Severity</th>
          <td>normal
          </td>
        </tr>

        <tr>
          <th>Classification</th>
          <td>Unclassified
          </td>
        </tr>

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

        <tr>
          <th>Reporter</th>
          <td>marti@juffo.org
          </td>
        </tr>

        <tr>
          <th>Hardware</th>
          <td>x86-64 (AMD64)
          </td>
        </tr>

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

        <tr>
          <th>Version</th>
          <td>unspecified
          </td>
        </tr>

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

        <tr>
          <th>Product</th>
          <td>DRI
          </td>
        </tr></table>
      <p>
        <div>
        <pre>With ASUS Radeon R9 270, just after I boot up and GDM is supposed to start, my
screen goes blank and some GPU faults are reported in dmesg.

Upgrading to kernel 3.13 solves this issue.

One time the graphics also recovered with 3.12.8 after coming back from
suspend, but I have not been able to reproduce that.

Using up-to-date Arch Linux testing with:
xorg-server 1.15.0
mesa 10.0.2
libdrm 2.4.51
xf86-video-ati 7.2.0
kernel versions tested: 3.12.8, 3.12.1, 3.11.5, 3.10.10

The following errors are reported in dmesg (full log attached):
radeon 0000:01:00.0: GPU fault detected: 147 0x005e7001
radeon 0000:01:00.0:   VM_CONTEXT1_PROTECTION_FAULT_ADDR   0x091C0002
radeon 0000:01:00.0:   VM_CONTEXT1_PROTECTION_FAULT_STATUS 0x1E070001
VM fault (0x01, vmid 15) at page 152829954, read from CP (112)
radeon 0000:01:00.0: GPU fault detected: 147 0x02de8801
radeon 0000:01:00.0:   VM_CONTEXT1_PROTECTION_FAULT_ADDR   0x00000000
radeon 0000:01:00.0:   VM_CONTEXT1_PROTECTION_FAULT_STATUS 0x00000000
VM fault (0x00, vmid 0) at page 0, read from unknown (0)
radeon 0000:01:00.0: GPU fault detected: 147 0x02de8801
radeon 0000:01:00.0:   VM_CONTEXT1_PROTECTION_FAULT_ADDR   0x00000000
radeon 0000:01:00.0:   VM_CONTEXT1_PROTECTION_FAULT_STATUS 0x00000000
VM fault (0x00, vmid 0) at page 0, read from unknown (0)
radeon 0000:01:00.0: GPU fault detected: 147 0x04df8402
radeon 0000:01:00.0:   VM_CONTEXT1_PROTECTION_FAULT_ADDR   0x00080826
radeon 0000:01:00.0:   VM_CONTEXT1_PROTECTION_FAULT_STATUS 0x1F084002
VM fault (0x02, vmid 15) at page 526374, write from TC (132)</pre>
        </div>
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