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      <base href="https://bugs.freedesktop.org/" />
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    <body><table border="1" cellspacing="0" cellpadding="8">
        <tr>
          <th>Bug ID</th>
          <td><a class="bz_bug_link 
          bz_status_NEW "
   title="NEW - [BSW][Linux]: GPU hang observed during S4 exit"
   href="https://bugs.freedesktop.org/show_bug.cgi?id=92435">92435</a>
          </td>
        </tr>

        <tr>
          <th>Summary</th>
          <td>[BSW][Linux]: GPU hang observed during S4 exit
          </td>
        </tr>

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

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

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

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

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

        <tr>
          <th>Severity</th>
          <td>major
          </td>
        </tr>

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

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

        <tr>
          <th>Assignee</th>
          <td>intel-gfx-bugs@lists.freedesktop.org
          </td>
        </tr>

        <tr>
          <th>Reporter</th>
          <td>vijayakannanx.ayyathurai@intel.com
          </td>
        </tr>

        <tr>
          <th>QA Contact</th>
          <td>intel-gfx-bugs@lists.freedesktop.org
          </td>
        </tr>

        <tr>
          <th>CC</th>
          <td>badex.appalanaidu@intel.com, girish.ks@intel.com, intel-gfx-bugs@lists.freedesktop.org, raju.rajakumar@intel.com, vijayakannanx.ayyathurai@intel.com
          </td>
        </tr>

        <tr>
          <th>i915 platform</th>
          <td>BSW/CHT
          </td>
        </tr></table>
      <p>
        <div>
        <pre>Created <span class=""><a href="attachment.cgi?id=118835" name="attach_118835" title="GPU_hang_dmesg_log">attachment 118835</a> <a href="attachment.cgi?id=118835&action=edit" title="GPU_hang_dmesg_log">[details]</a></span>
GPU_hang_dmesg_log

System Environment
==================
Board - Braswell M/D RVP
CPU - BSW D0 stepping CHERRY TRAIL QDF: K6XC  
Bios - BSW_SPI_Quad_R12_Config1_Production_BRASWEL_X64_R_X087_00_ME-2.0.1.2087
KSC - 1.08

Software stack:
===============
Kernel - (4.3-rc3) from
<a href="https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git">https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git</a>

Bug detailed description
========================
GPU hang observed during S4 exit. Drm is the cause for it.

Expected Result
=============
GPU hang should not come during the S4 exit.

Actual Result
===========
GPU hang is observed during S4 exit.

Reproduce Steps:
===============
1. Execute command as root:
echo disk > /sys/power/state
2. Wait for 80 seconds
3. Resume with keyboard/power button
4. Observe the GPU hang in the dmesg.
dmesg cut:
==========
[238772.956521] [drm] stuck on render ring
[238772.956527] [drm] stuck on bsd ring
[238772.956529] [drm] stuck on blitter ring
[238772.956530] [drm] stuck on video enhancement ring
[238772.976029] [drm] GPU HANG: ecode 8:0:0x7ebcfd38, reason: Ring hung,
action: reset

More details in the detailed log in the attachment.

Attachments:
===========
1. log_gpu_hang.</pre>
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