(I'm Chinese, not really good at English, so excuse me for the mistakes.) This happens on my ASUS K56CM too.
But, there's something really strange you might want to know: I installed Ubuntu 12.10 using wubi.exe under Windows 7 sometime earlier, and I got my headphone worked - ONCE AND ONLY ONCE. I'm not sure when it stopped working, probably after a forced shutdown or a system update. So, I just uninstalled wubi installation and installed into my hard drive - I didn't notice the first time, but I just confirmed that headphone doesn't work even in Live-CD, of course it doesn't work after installation. Anyway, laptop speakers worked pretty well. (well, I guess wubi just doesn't like me T^T. I never ever get ubuntu works stable under wubi even once. After install into my hard drive, ubuntu works much more stable than wubi installation.) -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1087428 Title: [K55VD, Realtek ALC270, Black Headphone Out, Right] No sound at all To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/alsa-driver/+bug/1087428/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs