Hi,
I have a Pismo 400 with 192 MBs ram. I clean installed 9.1 over my 9.0.4, and then OS X over that. I have a regular 2.1 cambridge soundworks speakers connected.
When i boot up in 9.1, there is no audio. My powerbook Mute on/off and volume controls on the keyboard go cranky, they don't work at all. There is no sound output. When i go to the sound control panel, it detects no "output devices" or "input devices" because some other application is using the sound or something like that. I've trashed sound, speech preferences, turned off speech extensions. no good.
This is the craziest part - when i unplug my speaker jack from the back of the PB, my system freezes in 9.1.
In OS X everything is fine except the powerbook volume and mute buttons don't work as well (they used to)
Does happen to noe what the probelm is? thank you!