so this is a strange issue. My sound device is being recognized:
[Tue Sep 12 14:16:53 2017] snd_hda_intel 0000:00:1f.3: bound 0000:00:02.0 (ops i915_audio_component_bind_ops [i915]) [Tue Sep 12 15:04:33 2017] snd_hda_intel 0000:00:1f.3: no codecs initialized
Even though no codecs are initialized, that shouldn't affect Jessie using the device, right?
This is the lspci -vv output for the audio device:
00:1f.3 Audio device: Intel Corporation Sunrise Point-H HD Audio (rev 31) Subsystem: Lenovo Device 30d0 Control: I/O- Mem+ BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr- Stepping- SERR- FastB2B- DisINTx+ Status: Cap+ 66MHz- UDF- FastB2B- ParErr- DEVSEL=fast >TAbort- <TAbort- <MAbort- >SERR- <PERR- INTx- Latency: 32 Interrupt: pin A routed to IRQ 125 Region 0: Memory at df040000 (64-bit, non-prefetchable) [size=16K] Region 4: Memory at df020000 (64-bit, non-prefetchable) [size=64K] Capabilities:  Power Management version 3 Flags: PMEClk- DSI- D1- D2- AuxCurrent=55mA PME(D0-,D1-,D2-,D3hot+,D3cold+) Status: D0 NoSoftRst+ PME-Enable- DSel=0 DScale=0 PME- Capabilities:  MSI: Enable+ Count=1/1 Maskable- 64bit+ Address: 00000000feeff00c Data: 4142 Kernel driver in use: snd_hda_intel
so, snd_hda_intel is loaded properly, and the device is being recognized by the kernel, but somehow, when I go to Sound > Hardware, no devices are present.
alsactl init fails with
alsactl: init:1758: No soundcards found..
--- no soundcards ---
Tried reinstalling alsa-utils as well as pulse to no avail. (even though reinstalling pulse was not expected to help, but eh, can't hurt).
Any help is appreciated
This is the mobo info + kernel running:
Mobo: LENOVO model: 30D0 v: SDK0J40705 WIN 3425060396052 Bios: LENOVO v: FWKT63A date: 12/08/2016. Kernel version running: 4.9.0-0.bpo.3-amd64