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    <body><span class="vcard"><a class="email" href="mailto:jinxianx.guo@intel.com" title="Guo Jinxian <jinxianx.guo@intel.com>"> <span class="fn">Guo Jinxian</span></a>
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              <a class="bz_bug_link 
          bz_status_NEW "
   title="NEW --- - [ILK/SNB/IVB/BYT/HSW/BDW]igt/drv_module_reload cause system random hang"
   href="https://bugs.freedesktop.org/show_bug.cgi?id=77511">bug 77511</a>
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          <tr>
            <th>What</th>
            <th>Removed</th>
            <th>Added</th>
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           <td style="text-align:right;">Status</td>
           <td>NEEDINFO
           </td>
           <td>NEW
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            <b><a class="bz_bug_link 
          bz_status_NEW "
   title="NEW --- - [ILK/SNB/IVB/BYT/HSW/BDW]igt/drv_module_reload cause system random hang"
   href="https://bugs.freedesktop.org/show_bug.cgi?id=77511#c2">Comment # 2</a>
              on <a class="bz_bug_link 
          bz_status_NEW "
   title="NEW --- - [ILK/SNB/IVB/BYT/HSW/BDW]igt/drv_module_reload cause system random hang"
   href="https://bugs.freedesktop.org/show_bug.cgi?id=77511">bug 77511</a>
              from <span class="vcard"><a class="email" href="mailto:jinxianx.guo@intel.com" title="Guo Jinxian <jinxianx.guo@intel.com>"> <span class="fn">Guo Jinxian</span></a>
</span></b>
        <pre>(In reply to <a href="show_bug.cgi?id=77511#c1">comment #1</a>)
<span class="quote">> Can you please bisect where this regression has been introduced?

> Both the module reload hang issue and the backtrace from

> [  104.889887] WARNING: CPU: 0 PID: 3807 at drivers/gpu/drm/drm_crtc.c:4684
> drm_mode_config_cleanup+0x114/0x1a0 [drm]()

> separately since they might be different bugs.</span >

About [  104.889887] WARNING: CPU: 0 PID: 3807 at
drivers/gpu/drm/drm_crtc.c:4684
drm_mode_config_cleanup+0x114/0x1a0 [drm]()

4c6baa595f4e8516bb9cf0081765f90856aa2fe3 is the first bad commit
commit 4c6baa595f4e8516bb9cf0081765f90856aa2fe3
Author: Jesse Barnes <<a href="mailto:jbarnes@virtuousgeek.org">jbarnes@virtuousgeek.org</a>>
Date:   Fri Mar 7 08:57:50 2014 -0800

    drm/i915: get_plane_config support for ILK+ v3

    This should allow BIOS fb inheritance to work on ILK+ machines too.

    v2: handle tiled BIOS fbs (Kristian)
        split out common bits (Jesse)
    v3: alloc fb obj out in _init

    Signed-off-by: Jesse Barnes <<a href="mailto:jbarnes@virtuousgeek.org">jbarnes@virtuousgeek.org</a>>
    Signed-off-by: Daniel Vetter <<a href="mailto:daniel.vetter@ffwll.ch">daniel.vetter@ffwll.ch</a>>

:040000 040000 be6fd58e34c1ca582a123f0d47baaac24cd6ede1
c6d54592168e65908c1bdc65727150d3df1829ae M      drivers


About system random hang, we didn't met it during bisection. We will further
investigate it later.</pre>
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