[Pkg-alsa-devel] Bug#625233: alsa force-unload
Torquil Macdonald Sørensen
torquil at gmail.com
Mon May 2 17:32:24 UTC 2011
Package: alsa-base
Version: 1.0.23+dfsg-3
Followup-For: Bug #625233
Hi again. This follow-up includes the contents of /dev/snd before any
attempt is made to use "alsa force-unload".
Here is the procedure I go through:
root at asus:/home/tmac# fuser -v /dev/snd/*
Cannot open /proc/swaps
USER PID ACCESS COMMAND
/dev/snd/controlC1: tmac 2905 F.... xfce4-volumed
Then I do:
killall xfce4-volumed
Now I know that alsa force-unload will work after two attempts.
First, the list of modules:
tmac at asus:~$ lsmod | grep snd
snd_hda_codec_realtek 276796 1
snd_hda_intel 19308 1
snd_hda_codec 61909 2 snd_hda_codec_realtek,snd_hda_intel
snd_hwdep 4778 1 snd_hda_codec
snd_pcm 58675 2 snd_hda_intel,snd_hda_codec
snd_seq_midi 4048 0
snd_rawmidi 14532 1 snd_seq_midi
snd_seq_midi_event 4620 1 snd_seq_midi
snd_seq 40474 2 snd_seq_midi,snd_seq_midi_event
snd_timer 15885 2 snd_pcm,snd_seq
snd_seq_device 4505 3 snd_seq_midi,snd_rawmidi,snd_seq
snd 40080 11 snd_hda_codec_realtek,snd_hda_intel,snd_hda_codec,snd_hwdep,snd_pcm,snd_rawmidi,snd_seq,snd_timer,snd_seq_device
soundcore 864 1 snd
snd_page_alloc 5931 2 snd_hda_intel,snd_pcm
Then I run:
root at asus:/home/tmac# alsa force-unload
Unloading ALSA sound driver modules: snd-hda-codec-realtek snd-hda-intel snd-hda-codec snd-hwdep snd-pcm snd-seq-midi snd-rawmidi snd-seq-midi-event snd-seq snd-timer snd-seq-device snd-page-alloc (failed: modules still loaded: snd-hda-codec-realtek snd-hda-codec snd-hwdep snd-pcm snd-timer snd-page-alloc).
Not all modules are removed, as seen here:
tmac at asus:~$ lsmod | grep snd
snd_hda_codec_realtek 276796 0
snd_hda_codec 61909 1 snd_hda_codec_realtek
snd_hwdep 4778 1 snd_hda_codec
snd_pcm 58675 1 snd_hda_codec
snd_timer 15885 1 snd_pcm
snd 40080 5 snd_hda_codec_realtek,snd_hda_codec,snd_hwdep,snd_pcm,snd_timer
soundcore 864 1 snd
snd_page_alloc 5931 1 snd_pcm
Then I run again:
root at asus:/home/tmac# alsa force-unload
Unloading ALSA sound driver modules: snd-hda-codec-realtek snd-hda-codec snd-hwdep snd-pcm snd-timer snd-page-alloc.
Now all modules are removed:
tmac at asus:~$ lsmod | grep snd
tmac at asus:~$
Bug #1: xfce4-volumed is not killed automatically by "alsa force-unload", since it uses
/dev/snd/control*, not /dev/snd/pcm*
Bug #2: Even after killing xfce4-volumed so no processes are using /dev/snd/*, I must run
alsa force-unload twice to get rid of all snd* modules.
Best regards
Torquil Sørensen
-- Package-specific info:
--- Begin additional package status ---
Desired=Unknown/Install/Remove/Purge/Hold
| Status=Not/Inst/Conf-files/Unpacked/halF-conf/Half-inst/trig-aWait/Trig-pend
|/ Err?=(none)/Reinst-required (Status,Err: uppercase=bad)
||/ Name Version Description
+++-==================================-==================================-====================================================================================
ii libasound2 1.0.23-3 shared library for ALSA applications
--- End additional package status ---
--- Begin /proc/asound/version ---
Advanced Linux Sound Architecture Driver Version 1.0.23.
--- End /proc/asound/version ---
--- Begin /proc/asound/cards ---
1 [NVidia ]: HDA-Intel - HDA NVidia
HDA NVidia at 0xfae78000 irq 23
2 [NVidia_1 ]: HDA-Intel - HDA NVidia
HDA NVidia at 0xfaf7c000 irq 17
--- End /proc/asound/cards ---
--- Begin /dev/snd/ listing ---
total 0
drwxr-xr-x 2 root root 80 May 2 19:23 by-path
crw-rw----+ 1 root audio 116, 5 May 2 19:23 controlC1
crw-rw----+ 1 root audio 116, 10 May 2 19:23 controlC2
crw-rw----+ 1 root audio 116, 4 May 2 19:23 hwC1D0
crw-rw----+ 1 root audio 116, 9 May 2 19:23 hwC2D0
crw-rw----+ 1 root audio 116, 8 May 2 19:23 hwC2D1
crw-rw----+ 1 root audio 116, 7 May 2 19:23 hwC2D2
crw-rw----+ 1 root audio 116, 6 May 2 19:23 hwC2D3
crw-rw----+ 1 root audio 116, 3 May 2 19:23 pcmC1D0c
crw-rw----+ 1 root audio 116, 2 May 2 19:23 pcmC1D0p
crw-rw----+ 1 root audio 116, 1 May 2 19:23 seq
crw-rw----+ 1 root audio 116, 33 May 2 19:23 timer
--- End /dev/snd/ listing ---
-- System Information:
Debian Release: wheezy/sid
APT prefers unstable
APT policy: (500, 'unstable')
Architecture: amd64 (x86_64)
Kernel: Linux 2.6.38.4 (SMP w/2 CPU cores; PREEMPT)
Locale: LANG=en_GB.UTF-8, LC_CTYPE=en_GB.UTF-8 (charmap=UTF-8)
Shell: /bin/sh linked to /bin/dash
Versions of packages alsa-base depends on:
ii linux-sound-base 1.0.23+dfsg-3 base package for ALSA and OSS soun
ii module-init-tools 3.12-1 tools for managing Linux kernel mo
ii udev 168-1 /dev/ and hotplug management daemo
Versions of packages alsa-base recommends:
ii alsa-utils 1.0.23-4 Utilities for configuring and usin
Versions of packages alsa-base suggests:
ii alsa-oss 1.0.17-4 ALSA wrapper for OSS applications
pn apmd <none> (no description available)
ii oss-compat 0.0.4+nmu3 OSS compatibility package
Versions of packages libasound2 depends on:
ii libc6 2.13-1 Embedded GNU C Library: Shared lib
Versions of packages libasound2 suggests:
ii libasound2-plugins 1.0.23-2 ALSA library additional plugins
-- Configuration Files:
/etc/modprobe.d/alsa-base-blacklist.conf changed:
blacklist snd-pcsp
blacklist snd_hda_codec_hdmi
/etc/modprobe.d/alsa-base.conf changed:
install sound-slot-0 /sbin/modprobe snd-card-0
install sound-slot-1 /sbin/modprobe snd-card-1
install sound-slot-2 /sbin/modprobe snd-card-2
install sound-slot-3 /sbin/modprobe snd-card-3
install sound-slot-4 /sbin/modprobe snd-card-4
install sound-slot-5 /sbin/modprobe snd-card-5
install sound-slot-6 /sbin/modprobe snd-card-6
install sound-slot-7 /sbin/modprobe snd-card-7
install snd /sbin/modprobe --ignore-install snd && { /sbin/modprobe --quiet snd-ioctl32 ; /sbin/modprobe --quiet snd-seq ; }
install snd-rawmidi /sbin/modprobe --ignore-install snd-rawmidi && { /sbin/modprobe --quiet snd-seq-midi ; : ; }
install snd-emu10k1 /sbin/modprobe --ignore-install snd-emu10k1 && { /sbin/modprobe --quiet snd-emu10k1-synth ; : ; }
options bt87x index=-2
options cx88_alsa index=-2
options snd-atiixp-modem index=-2
options snd-intel8x0m index=-2
options snd-via82xx-modem index=-2
options snd-pcsp index=-2
options snd-usb-audio nrpacks=1
options snd-hda-intel model=auto
options snd slots=snd-usb-audio,snd-hda-intel
-- no debconf information
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