With a powerbook g4 I've had the same problem for the last several kernels and is still a problem with 2.6.24-7-powerpc.
I've discovered that the powerpc-smp image does not have the problem, audio plays fine. I have been using vmlinux-2.6.22-14-powerpc-smp with no audio problems. Unfortunatly 2.6.24-powerpc-smp is not configured with IDE_PMAC so I can't test it. ~$ cat /proc/cpuinfo processor : 0 cpu : 7455, altivec supported clock : 667.000000MHz revision : 0.1 (pvr 8001 0201) bogomips : 66.56 timebase : 33331265 platform : PowerMac machine : PowerBook3,4 motherboard : PowerBook3,4 MacRISC2 MacRISC Power Macintosh detected as : 73 (PowerBook Titanium III) pmac flags : 0000001b L2 cache : 256K unified pmac-generation : NewWorld -- No sound in linux-image-2.6.20-8-powerpc G4 https://bugs.launchpad.net/bugs/87652 You received this bug notification because you are a member of Ubuntu Bugs, which is the bug contact for Ubuntu. -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs