Comment 52 for bug 42600

Gateway laptop M-6319 microphone doesn't work at all.

$ lspci -vv -s 00:1b.0
00:1b.0 Audio device: Intel Corporation 82801H (ICH8 Family) HD Audio Controller (rev 03)
 Subsystem: Gateway 2000 Unknown device 0380
 Control: I/O- Mem+ BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr- Stepping- SERR+ FastB2B-
 Status: Cap+ 66MHz- UDF- FastB2B- ParErr- DEVSEL=fast >TAbort- <TAbort- <MAbort- >SERR- <PERR-
 Latency: 0, Cache Line Size: 64 bytes
 Interrupt: pin A routed to IRQ 22
 Region 0: Memory at fa500000 (64-bit, non-prefetchable) [size=16K]
 Capabilities: <access denied>

Max volume was also too low, and now seems better when I added to the end of /etc/modprobe.d/alsa-base the following line
options snd-hda-intel model=ref