I have a very similar problem on an HP g62 with 10.04 x86_64. Same Radeon HD 4200 sound device too. It appears that Intel's HDA driver gets loaded for it.
01:05.1 Audio device: ATI Technologies Inc RS880 Audio Device [Radeon HD 4200] Subsystem: Hewlett-Packard Company Device 1444 Flags: bus master, fast devsel, latency 0, IRQ 19 Memory at d0310000 (32-bit, non-prefetchable) [size=16K] Capabilities: [50] Power Management version 3 Capabilities: [a0] Message Signalled Interrupts: Mask- 64bit+ Queue=0/0 Enable- Kernel driver in use: HDA Intel Kernel modules: snd-hda-intel Full output of lspci -v attached. -- ATI Technologies Inc RS880 Audio Device [Radeon HD 4200] very erratic https://bugs.launchpad.net/bugs/513069 You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs