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            <b><a class="bz_bug_link 
          bz_status_RESOLVED  bz_closed"
   title="RESOLVED FIXED - piglit/glean/readPixSanity fails - dmesg PGRAPH - TRAP_TPDMA - TP0: Unhandled ustatus 0x00020000"
   href="https://bugs.freedesktop.org/show_bug.cgi?id=42479#c6">Comment # 6</a>
              on <a class="bz_bug_link 
          bz_status_RESOLVED  bz_closed"
   title="RESOLVED FIXED - piglit/glean/readPixSanity fails - dmesg PGRAPH - TRAP_TPDMA - TP0: Unhandled ustatus 0x00020000"
   href="https://bugs.freedesktop.org/show_bug.cgi?id=42479">bug 42479</a>
              from <span class="vcard"><a class="email" href="mailto:imirkin@alum.mit.edu" title="Ilia Mirkin <imirkin@alum.mit.edu>"> <span class="fn">Ilia Mirkin</span></a>
</span></b>
        <pre>(In reply to <a href="show_bug.cgi?id=42479#c5">comment #5</a>)
<span class="quote">> nouveau.debug=debug and dmesg has entries:
> [342440.398336] nouveau D[  DEVICE][0000:02:00.0][0x80000080][f23fd840]
> illegal class 0xa06f
> [342440.398340] nouveau D[  DEVICE][0000:02:00.0][0x80000080][f23fd840]
> illegal class 0x906f

> I don't know if that is important.</span >

Appears to be a side-effect of how nouveau_chan.c:nouveau_channel_ind works --
it goes down the list of channel classes until it finds one that works. Those
are the nve0/nvc0 class ids (which nvaa obviously doesn't support).</pre>
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