Further to attachment 143008 [details]: there are lots of calls to dm_dp_aux_transfer
with aux=00000000f0bfdb41, but the first call with aux=0000000074cc4227 fails
(because the aux_engine pointer is NULL). Then a few more calls with
00000000f0bfdb41, 2 more with 0000000074cc4227 and lastly a few with
00000000f0bfdb41 again. Does that pattern jog anyone's memory?
Is anyone else reproducing this bug?
https://bugs.freedesktop.org/show_bug.cgi?id=108139#c5 mentions the name
"Stoney" (chipset(?)) in case that is any help.
If no-one else is reproducing this, what would be the most helpful thing I
could try next? I don't see this behviour in a VM, so can't gdb it.