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<b><a class="bz_bug_link
bz_status_NEW "
title="NEW - Unclaimed register detected before writing to register 0x20a8"
href="https://bugs.freedesktop.org/show_bug.cgi?id=92740#c2">Comment # 2</a>
on <a class="bz_bug_link
bz_status_NEW "
title="NEW - Unclaimed register detected before writing to register 0x20a8"
href="https://bugs.freedesktop.org/show_bug.cgi?id=92740">bug 92740</a>
from <span class="vcard"><a class="email" href="mailto:mika.kuoppala@intel.com" title="Mika Kuoppala <mika.kuoppala@intel.com>"> <span class="fn">Mika Kuoppala</span></a>
</span></b>
<pre>The keyword here is 'before'. When we enter the interrupt handling
there has already been unclaimed register access.
Please try with i915.mmio_debug=1000000. If you don't get any
'after' ones, then it is likely that some userspace lib does hardware access
without coordinating with driver.</pre>
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