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)
Confirming, maybe also Bug #92899.