Hi,
I got the same problem after upgrading to KDE 3.3 from unstable and found this bug report with exactly the same problem - in addition, several other mixer software didn't work on my box. I was, however, able to correct the situation by checking the symlinks I had in /dev. I had: lrwxrwxrwx 1 root root 11 2004-07-08 16:08 mixer -> /dev/mixer0 crwxrwxrwx 1 root audio 14, 0 2004-02-08 12:56 mixer0 crwxrwxrwx 1 root audio 14, 16 2004-02-08 12:56 mixer1 crwxrwxrwx 1 root audio 14, 32 2004-02-08 12:56 mixer2 crwxrwxrwx 1 root audio 14, 48 2004-02-08 12:56 mixer3 For some reason my SBPCI has been the card number 1 for some time (I only have 1 sound card), even though originally my SBPCI was the card number 0 - ie. it used to be /dev/snd/[PCM/HW]C0* but chaged to /dev/snd/[PCM/HW]C1* at some point. I figured this is the case of the mixer device also, so I changed the symlink: $ ln -sf mixer1 mixer -> kmix and several other mixer software, console as well some KDE / X apps, which didn't work previously, started to work again. So it appears this bug is caused by wrongly created symlinks and/or card device names created incorrectly (with the wrong file name), possibly at some upgrade. It may also be just users who don't know how to create the devices correctly; but on the other hand I also consider it a bug if a user needs to fiddle with /dev to get things working, especially if they used to work before :P p.s. I'm not on the mailing lists and do not wish to join at least ATM so I hope this is the correct way to comment on bug reports :P. If you need to comment me please add my address as a cc.