Aadebug
From the ALSA wiki
This is a simple shell script to aid ALSA audio debugging. If you are requesting help on the mailing list or at a friend, it's output may be very usefull. To use it, copy and paste the code below into an editor and save it as aadebug, then execute chmod +x aadebug. Run the script by typing ./aadebug in a shell and send the result to the person who is going to help you.
The script
#!/bin/bash echo "ALSA Audio Debug v0.2.0 - $(date)" echo "http://alsa.opensrc.org/aadebug" echo "http://www.gnu.org/licenses/agpl-3.0.txt" echo echo Kernel ---------------------------------------------------- uname -a cat /proc/asound/version echo echo Loaded Modules -------------------------------------------- lsmod | grep ^snd lsmod | egrep -q '(^usb-midi|^audio)' if [ $? -eq 0 ]; then echo "Warning: either 'audio' or 'usb-midi' OSS modules are loaded" echo "this may interfere with ALSA's snd-usb-audio." if [ ! -f /etc/hotplug/blacklist ]; then echo "You should create a file '/etc/hotplug/blacklist' with" echo "both names on it to avoid hotplug loading them." else egrep -q '(^usb-midi|^audio)' /etc/hotplug/blacklist if [ $? -eq 1 ]; then echo "You should add both modules to '/etc/hotplug/blacklist'" echo "to avoid hotplug loading them." fi fi fi echo echo Proc Asound ----------------------------------------------- if [ ! -d /proc/asound ] ; then echo "Warning: /proc/asound does not exist" echo "This indicates that ALSA is not installed correctly" echo "Check various logs in /var/log for a clue as to why" else cat /proc/asound/{cards,devices,hwdep,pcm,seq/clients} fi echo echo Dev Snd --------------------------------------------------- if [ ! -d /dev/snd ] ; then echo "Warning: /dev/snd does not exist" else /bin/ls -l /dev/snd fi echo echo CPU ------------------------------------------------------- grep -e "model name" -e "cpu MHz" /proc/cpuinfo echo echo RAM ------------------------------------------------------- grep -e MemTotal -e SwapTotal /proc/meminfo echo echo Hardware -------------------------------------------------- lspci | egrep -i "(audio|video|multimedia|vga)" echo echo Interupts ------------------------------------------------- cat /proc/interrupts echo if [ "$(echo $(uname -r) | grep 2.6)" -a -f /proc/config.gz ]; then echo Proc Config ----------------------------------------------- zcat /proc/config.gz | egrep "(CONFIG_SOUND|CONFIG_SND)" echo fi
Changelog
- 2011-04-16: Rearranged some items, removed modprobe.conf check, long list /dev/snd, add /proc/interrupts, AGPLv3 license change
- 2007-02-10: ingomueller.net - Changed the link in the script to this page
- 2005-10-11: Pedro Lopez - I've included a test in aadebug to check if the OSS modules for USB devices are loaded, which is a common source of problems. Also included a suggestion pointing the user to
/etc/hotplug/blacklistto solve the issue. Another addition is to include the contents of/proc/asound/seq/clients, which is useful to diagnose problems with ALSA sequencer. - 2005-02-27: Many thanks to P Fudd, Ilja Kogan, vb, Russell Harris and Robert Wenner for suggestions to this script
- 2004-06-02: Changed test for /etc/modules.conf to /etc/modprobe.conf, thanks to Ilja Kogan
- 2004-02-08: Added a test to show kernel config parameters for a 2.6 kernel with /proc/config.gz
Notes
If you are new to linux then these notes on using the command line shell may help. You may need to change to the root user, if so then type su - and enter your root users password. When finished with executing the script, type control-d to return to your normal user identity. You can capture the output to a file by typing...
aadebug > aadebug.txt 2>&1
The 2>&1 will ensure that any error messages are also captured to the aadebug.txt output file. If you want to get really fancy you could do something like...
aadebug | mail -s"My aadebug output" to@someone
if you system is set up to allow this.
