Jump to content
Welcome to InsanelyMac Forum

Register now to gain access to all of our features. Once registered and logged in, you will be able to contribute to this site by submitting your own content or replying to existing content. You'll be able to customize your profile, receive reputation points as a reward for submitting content, while also communicating with other members via your own private inbox, plus much more! This message will be removed once you have signed in.

  • Announcements

    • Allan

      Forum Rules   04/13/2018

      Hello folks! As some things are being fixed, we'll keep you updated. Per hour the Forum Rules don't have a dedicated "Tab", so here is the place that we have our Rules back. New Users Lounge > [READ] - InsanelyMac Forum Rules - The InsanelyMac Staff Team. 
Sign in to follow this  

Firewire audio device not working (IOAudioFamily.kext kernel panic)

2 posts in this topic

Recommended Posts

I'm trying to get a Firewire audio device working under a Lion setup (same for a 10.7.0 and 10.7.5 installation). So far all devices are working but when installing the firewire audio device driver, there is a kernel panic at boot time, even if the firewire device is not plugged:

PCI configuration changed (bridge=3 device=1 cardbus=0)
[ PCI configuration end, bridges 4 devices 32 ]
Alesis Firewire - (i386) Aug 16 2011 01:20:32
panic(cpu 0 caller 0x2ccb0f): Kernel trap at ...
Kernel extensions in backtrace:
dependency: [...]

Could the problem be related to the boot flag arch=i386 I'm using? (my graphics chip needs this to boot). Or does it have to do with NullCPUPowerManagement? Or could IOAudioFamily.kext possibly need patching, or maybe the Driver AlesisFirewire.kext?

When removing IOAudioFamily.kext it is booting but very slow and audio applications say "core audio not available" - but system profiler shows the firewire bus and the connected Alesis Multimix 16.

Thanks for any hints!


Share this post

Link to post
Share on other sites

Glad I found a temporary solution to this problem:
I just removed the extension (from the Firewire audio device, AlesisFirewire.kext) from the /System/Library/Extensions folder and now everytime the system has booted, I ussue:

sudo kextload /path/to/AlesisFirewire.kext

manually in a terminal.


Would be happy to hear if anyone knows a better solution.

Share this post

Link to post
Share on other sites

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!

Register a new account

Sign in

Already have an account? Sign in here.

Sign In Now

Sign in to follow this  

  • Recently Browsing   0 members

    No registered users viewing this page.