ACPI administration advocacy advocacy advocacy opinion alsa apache apple apt aptitude audio authentication awk bash BIOS boot business cache calendar censorship commandline cron database debian desktop development disk dvd economics emacs email europe exim files firefox firewall flash foss freedom ftp fun git grub hardware hardware html images installation ipod kde kernel keyboard knoppix laptop latex linux locale lockin longlines microsoft minitab mplayer multimedia mysql network nfs openbox openoffice opinion opinion partition pdf perl php politics postgresql printing privacy rant rxvt script scripting scsi security sed server shell siteadmin sitenews sitesoftware skype skype slackware sound spam ssh statistics subversion sudo svk swap t23 t43 terminal text thinkpad thunderbird time timezone ubuntu upgrade users versioncontrol video windows wine wordpress wordprocessing X40 xwindows xwindows youtube
For a while, I've had a problem with mplayer.
If there was another application using the sound system, e.g. firefox, then mplayer would not produce any sound. If I paused mplayer, watched something, say on youtube.com, and then restarted mplayer, mplayer would crash.
There is a fix. That is to add this line to ~/.mplayer/config:
ao=alsa:device=ch51dup
Red Hat Certified Technician & Engineer (RHCT and RHCE) Training Guide and Administrator's Reference