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<body><span class="vcard"><a class="email" href="mailto:elizabethx.de.la.torre.mena@intel.com" title="Elizabeth <elizabethx.de.la.torre.mena@intel.com>"> <span class="fn">Elizabeth</span></a>
</span> changed
<a class="bz_bug_link
bz_status_NEEDINFO "
title="NEEDINFO - [SKL] GPU HANG on rcs0 on Intel i915 on drm-tip"
href="https://bugs.freedesktop.org/show_bug.cgi?id=102221">bug 102221</a>
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<table border="1" cellspacing="0" cellpadding="8">
<tr>
<th>What</th>
<th>Removed</th>
<th>Added</th>
</tr>
<tr>
<td style="text-align:right;">Status</td>
<td>NEW
</td>
<td>NEEDINFO
</td>
</tr>
<tr>
<td style="text-align:right;">i915 features</td>
<td>GPU hang
</td>
<td>firmware/dmc
</td>
</tr></table>
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<b><a class="bz_bug_link
bz_status_NEEDINFO "
title="NEEDINFO - [SKL] GPU HANG on rcs0 on Intel i915 on drm-tip"
href="https://bugs.freedesktop.org/show_bug.cgi?id=102221#c7">Comment # 7</a>
on <a class="bz_bug_link
bz_status_NEEDINFO "
title="NEEDINFO - [SKL] GPU HANG on rcs0 on Intel i915 on drm-tip"
href="https://bugs.freedesktop.org/show_bug.cgi?id=102221">bug 102221</a>
from <span class="vcard"><a class="email" href="mailto:elizabethx.de.la.torre.mena@intel.com" title="Elizabeth <elizabethx.de.la.torre.mena@intel.com>"> <span class="fn">Elizabeth</span></a>
</span></b>
<pre>(In reply to Imre Deak from <a href="show_bug.cgi?id=102221#c4">comment #4</a>)
<span class="quote">> (In reply to Chris Wilson from <a href="show_bug.cgi?id=102221#c2">comment #2</a>)
> > No, extra drm.debug is not required. Looks like it didn't send the final
> > context-switch interrupt.
> >
> > Reasonable suspicion laid on
>
> Looks like a known DMC firmware bug, where toggling DC6 enabled state can
> corrupt registers backed by DC6 power context. There is an internal bug
> ticket opened for this, I'm planning to provide more debug info to the
> firmware team and convince them to fix it.
>
> One register that can get corrupted is GEN8_MASTER_IRQ leaving all i915
> interrupts disabled, that would also explain the missing ctx switch
> interrupt.
> ...</span >
Hello Imre, any relevant update for this bug that can be shared at FDO? Thank
you.</pre>
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