Same problem here. Did not, however tested what's happening when powering on with headphones attached. Ubuntu 12.04 64bit. No Problem in 10.04 10.10.
lspci -v: 00:1b.0 Audio device: Intel Corporation 82801I (ICH9 Family) HD Audio Controller (rev 03) Subsystem: Acer Incorporated [ALI] Device 015e Flags: bus master, fast devsel, latency 0, IRQ 46 Memory at f0400000 (64-bit, non-prefetchable) [size=16K] Capabilities: [50] Power Management version 2 Capabilities: [60] MSI: Enable+ Count=1/1 Maskable- 64bit+ Capabilities: [70] Express Root Complex Integrated Endpoint, MSI 00 Capabilities: [100] Virtual Channel Capabilities: [130] Root Complex Link Kernel driver in use: snd_hda_intel Kernel modules: snd-hda-intel Please fix, this is a no-go. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/995684 Title: Switching problem between headphone speaker and microphone to laptop built in speakers and front mic To manage notifications about this bug go to: https://bugs.launchpad.net/alsa-driver/+bug/995684/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs