Looking at the P170HM in a little more detail, there are some difference in the audio subsystems. My p180hm uses TPA2008 amplifier for the subwoofer-slash-center output (and from the block diagram on pg56 of the pdf below it looks like there is only one physical speaker ... so maybe I'm confused and my laptop has no physically distinct 'center' speaker for 5.1 but really only has 4.1 onboard? and maybe when I hear sound from the 'Center' channel what is making noise is the subwoofer?) For the other speakers, there is a TPA6017 amp for the leftRear/rightRear speakers, and another TPA6017 amp for the leftFront/rightFront speakers, plus connections for the internal mic and the external quad-jack. Schematic for the alc892 is on pg84.
By contrast, the p170hm block diagram on pg60 of the other pdf below shows a similar wiring-layout, again with the ALC892 at the center, but this time with three TI TPA2008d2 amps for frontLeft/frontRight + surroundLeft/surroundRight + center/subwoofer, and distinct connections for the internal mic and the external quad-jack. Schematic for the alc892 is on pg90. http://repo.palkeo.com/clevo-mirror/P18xHM/P18xHM_ESM.zip -- this is my 18" laptop http://repo.palkeo.com/clevo-mirror/P170HM/P17xHM_ESM.zip -- this is the similar 17" laptop -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1236965 Title: pulseaudio does not recognize internal speakers [P180HMx, Realtek ALC892, Speaker, Internal] volume slider problem To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/alsa-driver/+bug/1236965/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
