[Expired for pulseaudio (Ubuntu) because there has been no activity for
60 days.]
** Changed in: pulseaudio (Ubuntu)
Status: Incomplete => Expired
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https://bugs.launchpad.net/bugs/680861
Title:
pulseaudio goes into poll-read loop when removing usb device
Status in pulseaudio package in Ubuntu:
Expired
Bug description:
Binary package hint: pulseaudio
I'm testing with 2 USB sound devices. One works, one doesn't.
Using a Cakewalk (Roland) UA-25EX (2 audio channels in/out + midi
in/out) works fine. The device may be connected, removed and
reconnected at any time wouthout problems.
A Digitech RP1000 guitar processor (2 audio channels in/out + midi
in/out) sends pulseaudio into an endless loop when it is disconnected
or powered off. It appears to be an unhandled ENODEV as repeated in
strace:
[pid 21874] ppoll([{fd=3, events=POLLIN}, {fd=56, events=POLLIN}, {fd=55,
events=POLLIN}, {fd=7, events=POLLIN}, {fd=58, events=POLLIN}, {fd=64,
events=POLLIN}, {fd=67, events=POLLIN}, {fd=19, events=POLLIN}, {fd=57,
events=POLLIN}, {fd=18, events=POLLIN}, {fd=25, events=POLLIN}, {fd=51,
events=POLLIN}, {fd=54, events=POLLIN}, {fd=50, events=POLLIN}, {fd=49,
events=POLLIN}, {fd=48, events=POLLIN}, {fd=47, events=POLLIN}, {fd=46,
events=POLLIN}, {fd=45, events=POLLIN}, {fd=37, events=POLLIN}, {fd=40,
events=POLLIN}, {fd=36, events=POLLIN}, {fd=35, events=POLLIN}, {fd=34,
events=POLLIN}, {fd=33, events=POLLIN|POLLERR|POLLHUP}, {fd=33, events=0},
{fd=27, events=POLLIN}, {fd=30, events=POLLIN}, {fd=21, events=POLLIN}, {fd=24,
events=POLLIN}, {fd=14, events=POLLIN}, {fd=17, events=POLLIN}, ...], 37, {5,
749931000}, NULL, 8) = 1 ([{fd=58, revents=POLLERR}], left {5, 749924521})
[pid 21874] clock_gettime(CLOCK_MONOTONIC, {12993, 777619310}) = 0
[pid 21874] read(58, 0xbf8d1194, 72) = -1 ENODEV (No such device)
[pid 21874] clock_gettime(CLOCK_MONOTONIC, {12993, 777676225}) = 0
... then back to poll() and it keeps looping trying to read off the same fd
(58).
Output from pulseaudio (--log-level=debug) from pulseaudio starting
when the RP1000 gets connected is attached. There is only one line of
info written after the cable is pulled (or turned off) before
pulseaudio spins off in the loop.
D: module-udev-detect.c: /dev/snd/controlC2 is accessible: no
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