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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 - [BDW] drm crashes on newer kernels"
   href="https://bugs.freedesktop.org/show_bug.cgi?id=101694">101694</a>
          </td>
        </tr>

        <tr>
          <th>Summary</th>
          <td>[BDW] drm crashes on newer kernels
          </td>
        </tr>

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

        <tr>
          <th>Version</th>
          <td>unspecified
          </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>critical
          </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>bugger@grr.la
          </td>
        </tr>

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

        <tr>
          <th>CC</th>
          <td>intel-gfx-bugs@lists.freedesktop.org
          </td>
        </tr></table>
      <p>
        <div>
        <pre>Created <span class=""><a href="attachment.cgi?id=132426" name="attach_132426" title="/sys/class/drm/card0/error">attachment 132426</a> <a href="attachment.cgi?id=132426&action=edit" title="/sys/class/drm/card0/error">[details]</a></span>
/sys/class/drm/card0/error

On newer kernels, Xorg sometimes freezes temporarily. The bug occured on at
least kernels 4.11.8 and 4.12.0, while 4.9.33 did not, after a long while of
intense usage. This indicates that this is a kernel issue, but not necessarily.

chipset: Intel i5-5257U
system architecture: 64-bit
xf86-video-intel: not installed
xserver: 1.19.3
mesa: 17.1.14
libdrm: 2.4.81
kernel: 4.12.0
Linux distribution: Void (with musl libc)
Machine or mobo model: Apple MacBookPro12,1 (2015)
Display connector: internal monitor

Reproduction:
Open chromium and load some intensive web pages. After a while it should freeze
for a few seconds, and later return to normal after some minor graphic
artifacts. This will occur repeatedly indefinitely.

dmesg excerpt:

[  202.561869] DMAR: DRHD: handling fault status reg 3
[  202.561874] DMAR: [DMA Write] Request device [00:02.0] fault addr fd285000
[fault reason 23] Unknown
[  209.700964] [drm] GPU HANG: ecode 8:0:0x85dffffb, in chromium [1064],
reason: Hang on rcs, action: reset
[  209.700965] [drm] GPU hangs can indicate a bug anywhere in the entire gfx
stack, including userspace.
[  209.700966] [drm] Please file a _new_ bug report on bugs.freedesktop.org
against DRI -> DRM/Intel
[  209.700966] [drm] drm/i915 developers can then reassign to the right
component if it's not a kernel issue.
[  209.700966] [drm] The gpu crash dump is required to analyze gpu hangs, so
please always attach it.
[  209.700967] [drm] GPU crash dump saved to /sys/class/drm/card0/error
[  209.701011] drm/i915: Resetting chip after gpu hang
[  219.743979] drm/i915: Resetting chip after gpu hang
[  229.727960] drm/i915: Resetting chip after gpu hang
[  229.728133] DMAR: DRHD: handling fault status reg 2
[  229.728138] DMAR: [DMA Write] Request device [00:02.0] fault addr ffff9000
[fault reason 23] Unknown
[  241.759968] drm/i915: Resetting chip after gpu hang
[  249.760012] drm/i915: Resetting chip after gpu hang
[  249.866657] DMAR: DRHD: handling fault status reg 3
[  249.866664] DMAR: [DMA Write] Request device [00:02.0] fault addr fbb00000
[fault reason 23] Unknown
[  259.744063] drm/i915: Resetting chip after gpu hang
[  269.728105] drm/i915: Resetting chip after gpu hang
[  448.369227] DMAR: DRHD: handling fault status reg 3
...etc...</pre>
        </div>
      </p>


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