Public bug reported:
I recently purchased a Lenovo 3000 v100 laptop that comes with an Intel
82801G sound card (more details below). I am running Edgy Eft on this
laptop with all the updates. I have a number of problems using sound on
this system. One is that the volume of the front speakers on the laptop
affects the volume of the headphones. In particular, you can't hear
anything out of the headphones if the front speakers are muted. You can
make the front speakers very low and turn the headphones up, but this
isn't a very practical solution. The two shouldn't be connected (as far
as I know) and most laptops automatically switch from one to the other
when the headphones are connected and disconnected. In Windows, a
window automatically pops up with sound options when headphones are
inserted.
Another problem I am having is with the integrated microphone. Despite
having the capture volume at full, the captured sound has a very low
volume. I haven't figured out a solution for this other than using an
external microphone.
All of these problems are related to a rather confusing Gnome Volume
Control window. I will attach snapshots of the window. Under
"Playback" there are volume controls for headphone and front, but these
are not independent. There is also a volume control for the
"Microphone", but that doesn't make sense on the Playback tab. Under
"Capture", there are two capture devices, but it isn't clear why.
Perhaps one is for an external microphone, but these two also don't
appear to be independent as unmuting both appears to help the volume of
the integrated microphone. Under "Options", there are two identical
"Input Source" selections with no clear differentiation. Each has only
one option "Mic". Plugging in an external microphone doesn't change
that.
In case it is useful, here is the result of lspci for the soundcard:
$ sudo lspci -vd 8086:27d8
00:1b.0 Audio device: Intel Corporation 82801G (ICH7 Family) High Definition
Audio Controller (rev 02)
Subsystem: Lenovo Unknown device 3bfd
Flags: bus master, fast devsel, latency 0, IRQ 50
Memory at d8240000 (64-bit, non-prefetchable) [size=16K]
Capabilities: [50] Power Management version 2
Capabilities: [60] Message Signalled Interrupts: 64bit+ Queue=0/0
Enable-
Capabilities: [70] Express Unknown type IRQ 0
Capabilities: [100] Virtual Channel
Capabilities: [130] Unknown (5)
** Affects: Ubuntu
Importance: Undecided
Status: Unconfirmed
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Laptop sound originates from both laptop and headphones
https://launchpad.net/bugs/92358
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