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            <b><a class="bz_bug_link 
          bz_status_NEW "
   title="NEW --- - render ring hung"
   href="https://bugs.freedesktop.org/show_bug.cgi?id=75207#c2">Comment # 2</a>
              on <a class="bz_bug_link 
          bz_status_NEW "
   title="NEW --- - render ring hung"
   href="https://bugs.freedesktop.org/show_bug.cgi?id=75207">bug 75207</a>
              from <span class="vcard"><a class="email" href="mailto:eero.t.tamminen@intel.com" title="Eero Tamminen <eero.t.tamminen@intel.com>"> <span class="fn">Eero Tamminen</span></a>
</span></b>
        <pre>Created <span class=""><a href="attachment.cgi?id=94365" name="attach_94365" title="error state information">attachment 94365</a> <a href="attachment.cgi?id=94365&action=edit" title="error state information">[details]</a></span>
error state information

This is completely reproducible, also e.g. with Trine2.

Both in mine and Tapani's case kernel is default Ubuntu 13.10 one.

Attached is error state snapshot from this:
[ 5296.924257] [drm:i915_hangcheck_elapsed] *ERROR* stuck on render ring
[ 5296.924260] [drm] capturing error event; look for more information in
/sys/kernel/debug/dri/0/i915_error_state
[ 5302.910090] [drm:i915_hangcheck_elapsed] *ERROR* stuck on render ring</pre>
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