I'd like to add some more information.

I sometimes get this message close to login on 8.10:

[ 1815.360302] canberra-gtk-pl[28014]: segfault at ae64790 ip b718884d sp 
b6725190 error 6 in libpulse.so.0.4.1[b7149000+4e000]
[ 1885.644970] hda-intel: IRQ timing workaround is activated for card #0. 
Suggest a bigger bdl_pos_adj.

This message does /not/ result in the impaired audio functionality I
describe below. In other circumstances, the below occurs:

My hda-intel driver sometimes shares an interrupt with sata_nv, and when
it does (after some time, maybe 4-5 hours of using the computer) I end
up with one of my internal hard drives reporting many SATA error codes
and bus read errors, and eventually the kernel unmounts the partition to
save it from data loss. Any use of audio is severely impaired -- any app
that plays audio hangs while looping the first bit of the audio. For
example, `aplay /usr/share/sounds/question.wav' will result in aplay
hanging, and the first half second of question.wav being played
repeatedly.

Shutting down pulseaudio (pulseaudio --kill), and then
removing/reloading the hda-intel driver (rmmod snd_hda_intel / modprobe
snd_hda_intel) does not fix the problem.

Hope this helps -- feel free to ask for any more info.

Thanks,
RJ Ryan

-- 
hda-intel: IRQ timing workaround is activated for card #0. Suggest a bigger 
bdl_pos_adj
https://bugs.launchpad.net/bugs/267913
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