https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=295869
Bug ID: 295869
Summary: virtual_oss unkillable
Product: Base System
Version: 15.1-RELEASE
Hardware: Any
OS: Any
Status: New
Severity: Affects Only Me
Priority: ---
Component: kern
Assignee: [email protected]
Reporter: [email protected]
I'm running virtual_oss for changing between internal card (dsp2) and USB
(dsp5) on FreeBSD 15.1-RC2.
virtual_oss worked for days, switched sound between internal and external card
for Firefox, mpv, WINE.
I was toying with 2nd USB card (dsp6) which is RP2040 MCU with DSPi firmware,
but I am not sure if that provoked this.
That "sound card" produces sound on other FreeBSD PC without virtual_oss. On
this system trying to play something with mpv will result in stuck audio output
- no sound, timestamps are frozen, but there are no errors.
Tried to stop virtual_oss but it is still in the list of processes. Closed all
application which use sound, still unkillable.
# cat /dev/sndstat
Installed devices:
pcm0: <ATI R6xx (HDMI)> (play)
pcm1: <ATI R6xx (HDMI)> (play)
pcm2: <Realtek ALCS1200A (Rear Analog 5.1/2.0)> (play/rec) default
pcm3: <Realtek ALCS1200A (Front Analog)> (play/rec)
pcm4: <Realtek ALCS1200A (Rear Digital)> (play)
pcm5: <Jieli Technology USB Composite Device> (play/rec)
pcm6: <WeebLabs ASDF Weeb Labs DSPi> (play)
Installed devices from userspace:
dsp: <virtual_oss device> (play/rec)
# grep virtual_oss /etc/rc.conf
virtual_oss_enable="YES"
virtual_oss_dsp="-i 8 -c 2 -S -r 48000 -b 16 -s 16ms -f /dev/dsp2 -d dsp -t
dsp.ctl"
# ps aux | grep virtual_oss
root 3548 0.0 0.1 85464 23860 - D<Es Mon13 71:45.94
/usr/sbin/virtual_oss -B -D /var/run/virtual_oss/dsp.pid -i 8 -c 2 -S -r 48000
-b 16 -s 16ms -f /dev/dsp2 -d dsp -t dsp.ctl
Process is in unkillable state (D). It is single process in that state
# ps -axl | grep ' D'
0 0 0 2 -15 0 0 7952 - DLs - 97:52.90
[kernel]
0 3 0 9 -15 0 0 272 crypto_w DL - 0:00.00
[crypto]
0 4 0 5 -15 0 0 80 - DL - 1:44.40
[cam]
0 5 0 4 -54 0 0 16 - DL - 0:00.00
[busdma]
0 6 0 13 0 0 0 5216 t->zthr_ DL - 15:12.33
[zfskern]
0 7 0 12 -15 0 0 16 - DL - 0:42.40
[rand_harvestq]
0 8 0 14 -15 0 0 48 psleep DL - 17:02.62
[pagedaemon]
0 9 0 15 -15 0 0 16 psleep DL - 3:02.29
[vmdaemon]
0 10 0 13 -15 0 0 16 audit_wo DL - 0:00.00
[audit]
0 13 0 8 0 0 0 48 - DL - 0:00.09
[geom]
0 14 0 5 -54 0 0 240 - DL - 32:57.17
[usb]
0 15 0 10 -15 0 0 128 psleep DL - 0:08.65
[bufdaemon]
0 16 0 12 -15 0 0 16 vlruwt DL - 0:01.64
[vnlru]
0 17 0 10 -7 0 0 16 syncer DL - 0:03.86
[syncer]
0 18 0 15 -15 0 0 16 - DL - 4:15.73
[racctd]
0 2182 0 15 -15 0 0 256 sleep DL - 0:00.00
[ng_queue]
0 3319 0 13 -15 0 0 16 pftm DL - 1:08.50 [pf
purge]
0 3548 1 15 -40 0 85464 23860 W D<Es - 71:45.88
/usr/sbin/virtual_oss -B -D /var/run/virtual_oss/dsp.pid -i 8 -c 2 -S -r 48000
-b 16 -s 16ms -f /dev/dsp2 -d dsp -t dsp.ctl
# procstat -b 3548
PID COMM OSREL PATH
# procstat -f 3548
procstat: kinfo_getfile(): No such process
PID COMM FD T V FLAGS REF OFFSET PRO NAME
# fstat -p 3548
USER CMD PID FD MOUNT INUM MODE SZ|DV R/W
fstat: kinfo_getfile(): No such process
# procstat -k 3548
PID TID COMM TDNAME KSTACK
# procstat -v 3548
PID START END PRT RES PRES REF SHD FLAG TP PATH
# procstat -t 3548
PID TID COMM TDNAME CPU PRI STATE WCHAN
3548 101546 virtual_oss - -1 16 sleep W
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