Now I have upgraded kernel version and now i see only HDMI output on sound devices. Still No Audio Output.

davidm@davidm-Inspiron-5559:~$ aplay -l
**** List of PLAYBACK Hardware Devices ****
card 0: PCH [HDA Intel PCH], device 3: Generic Digital [Generic Digital]
  Subdevices: 0/1
  Subdevice #0: subdevice #0
davidm@davidm-Inspiron-5559:~$ grep snd /proc/asound/modules
 0 snd_hda_intel
davidm@davidm-Inspiron-5559:~$ 

sudo lspci -vvv | grep -A 40 -i audio 
[sudo] password for davidm: 
00:1f.3 Audio device: Intel Corporation Sunrise Point-LP HD Audio (rev 21)
	Subsystem: Dell Sunrise Point-LP HD Audio
	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 16
	Region 0: Memory at d1220000 (64-bit, non-prefetchable) [size=16K]
	Region 4: Memory at d1200000 (64-bit, non-prefetchable) [size=64K]
	Capabilities: [50] 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: [60] MSI: Enable- Count=1/1 Maskable- 64bit+
		Address: 0000000000000000  Data: 0000
	Kernel driver in use: snd_hda_intel
	Kernel modules: snd_hda_intel, snd_soc_skl

00:1f.4 SMBus: Intel Corporation Sunrise Point-LP SMBus (rev 21)
	Subsystem: Dell Sunrise Point-LP SMBus
	Control: I/O+ Mem+ BusMaster- SpecCycle- MemWINV- VGASnoop- ParErr- Stepping- SERR- FastB2B- DisINTx-
	Status: Cap- 66MHz- UDF- FastB2B+ ParErr- DEVSEL=medium >TAbort- <TAbort- <MAbort- >SERR- <PERR- INTx-
	Interrupt: pin A routed to IRQ 11
	Region 0: Memory at d122a000 (64-bit, non-prefetchable) [size=256]
	Region 4: I/O ports at f040 [size=32]
	Kernel modules: i2c_i801

01:00.0 Network controller: Intel Corporation Wireless 3160 (rev 83)
	Subsystem: Intel Corporation Dual Band Wireless AC 3160
	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: 0
	Interrupt: pin A routed to IRQ 279
	Region 0: Memory at d1100000 (64-bit, non-prefetchable) [size=8K]
	Capabilities: [c8] Power Management version 3
		Flags: PMEClk- DSI+ D1- D2- AuxCurrent=0mA PME(D0+,D1-,D2-,D3hot+,D3cold+)
		Status: D0 NoSoftRst- PME-Enable- DSel=0 DScale=0 PME-
	Capabilities: [d0] MSI: Enable+ Count=1/1 Maskable- 64bit+
		Address: 00000000fee002d8  Data: 0000
	Capabilities: [40] Express (v2) Endpoint, MSI 00
		DevCap:	MaxPayload 128 bytes, PhantFunc 0, Latency L0s <512ns, L1 unlimited
			ExtTag- AttnBtn- AttnInd- PwrInd- RBE+ FLReset+
		DevCtl:	Report errors: Correctable- Non-Fatal- Fatal- Unsupported-
			RlxdOrd+ ExtTag- PhantFunc- AuxPwr+ NoSnoop+ FLReset-
pcilib: sysfs_read_vpd: read failed: Input/output error





*****************************************************************************
davidm@davidm-Inspiron-5559:~$ lspci -nn | grep -i audio
00:1f.3 Audio device [0403]: Intel Corporation Sunrise Point-LP HD Audio [8086:9d70] (rev 21)
davidm@davidm-Inspiron-5559:~$ 


davidm@davidm-Inspiron-5559:~$ dmesg | egrep -i 'snd|intel|hda|hdmi|audio|sound|err'
[    0.000000] ACPI: LPIT 0x0000000087FF4280 000094 (v01 INTEL  SKL-ULT  00000000 MSFT 0000005F)
[    0.000000] ACPI: SSDT 0x0000000087FF4318 000248 (v02 INTEL  sensrhub 00000000 INTL 20120913)
[    0.000000] ACPI: SSDT 0x0000000087FF4560 002BAE (v02 INTEL  PtidDevc 00001000 INTL 20120913)
[    0.000000] ACPI: SSDT 0x0000000087FF7110 000C45 (v02 INTEL  Ther_Rvp 00001000 INTL 20120913)
[    0.000000] ACPI: DBGP 0x0000000087FF7D58 000034 (v01 INTEL           00000000 MSFT 0000005F)
[    0.000000] ACPI: DBG2 0x0000000087FF7D90 000054 (v00 INTEL           00000000 MSFT 0000005F)
[    0.000000] ACPI: SSDT 0x0000000087FF7DE8 000740 (v02 INTEL  xh_rvp07 00000000 INTL 20120913)
[    0.000000] ACPI: DMAR 0x0000000087FFCB30 0000F0 (v01 INTEL  SKL      00000001 INTL 00000001)
[    0.000000] ACPI: ASF! 0x0000000087FFCC58 0000A5 (v32 INTEL   HCG     00000001 TFSM 000F4240)
[    0.000000] Reserving Intel graphics stolen memory at 0x8a000000-0x8bffffff
[    0.000000] ACPI: IRQ0 used by override.
[    0.000000] ACPI: IRQ9 used by override.
[    0.000000] spurious 8259A interrupt: IRQ7.
[    0.046898] DMAR-IR: Use 'intremap=no_x2apic_optout' to override the BIOS setting.
[    0.091985] smpboot: CPU0: Intel(R) Core(TM) i7-6500U CPU @ 2.50GHz (family: 0x6, model: 0x4e, stepping: 0x3)
[    0.091987] Performance Events: PEBS fmt3+, 32-deep LBR, Skylake events, full-width counters, Intel PMU driver.
[    0.543066] ACPI: Using IOAPIC for interrupt routing
[    0.565651] acpi PNP0A08:00: _OSC failed (AE_ERROR); disabling ASPM
[    0.587981] ACPI: PCI Interrupt Link [LNKA] (IRQs 3 4 5 6 10 *11 12 14 15)
[    0.588028] ACPI: PCI Interrupt Link [LNKB] (IRQs 3 4 5 6 *10 11 12 14 15)
[    0.588074] ACPI: PCI Interrupt Link [LNKC] (IRQs 3 4 5 6 10 *11 12 14 15)
[    0.588119] ACPI: PCI Interrupt Link [LNKD] (IRQs 3 4 5 6 10 *11 12 14 15)
[    0.588164] ACPI: PCI Interrupt Link [LNKE] (IRQs 3 4 5 6 10 *11 12 14 15)
[    0.588208] ACPI: PCI Interrupt Link [LNKF] (IRQs 3 4 5 6 10 *11 12 14 15)
[    0.588253] ACPI: PCI Interrupt Link [LNKG] (IRQs 3 4 5 6 10 *11 12 14 15)
[    0.588297] ACPI: PCI Interrupt Link [LNKH] (IRQs 3 4 5 6 10 *11 12 14 15)
[    1.366432] intel_idle: MWAIT substates: 0x11142120
[    1.366433] intel_idle: v0.4.1 model 0x4E
[    1.366613] intel_idle: lapic_timer_reliable_states 0xffffffff
[    1.370172] intel_pstate: Intel P-state driver initializing
[    1.370434] intel_pstate: HWP enabled
[    1.370786] intel_pmc_core 0000:00:1f.2: enabling device (0000 -> 0002)
[    1.558398] fb: switching to inteldrmfb from simple
[    1.866263] fbcon: inteldrmfb (fb0) is primary device
[    3.055784] i915 0000:00:02.0: fb0: inteldrmfb frame buffer device
[   17.489001] EXT4-fs (sda2): re-mounted. Opts: errors=remount-ro
[   18.318058] intel-lpss 0000:00:15.0: enabling device (0000 -> 0002)
[   18.346744] idma64 idma64.0: Found Intel integrated DMA 64-bit
[   18.378062] intel-lpss 0000:00:15.1: enabling device (0000 -> 0002)
[   18.378357] idma64 idma64.1: Found Intel integrated DMA 64-bit
[   18.671971] tpm_crb: probe of MSFT0101:00 failed with error -16
[   18.706657] Bluetooth: HCI UART protocol Intel registered
[   18.960744] Intel(R) Wireless WiFi driver for Linux
[   18.960746] Copyright(c) 2003- 2015 Intel Corporation
[   19.296046] Bluetooth: hci0: read Intel version: 3707100100012d0d00
[   19.364903] Bluetooth: hci0: Intel Bluetooth firmware file: intel/ibt-hw-37.7.10-fw-1.0.1.2d.d.bseq
[   19.489056] Bluetooth: hci0: Intel Bluetooth firmware patch completed and activated
[   19.975600] iwlwifi 0000:01:00.0: Detected Intel(R) Dual Band Wireless AC 3160, REV=0x164
[   20.742153] snd_hda_intel 0000:00:1f.3: enabling device (0000 -> 0002)
[   20.742300] snd_hda_intel 0000:00:1f.3: bound 0000:00:02.0 (ops i915_audio_component_bind_ops [i915])
[   21.114748] intel_rapl: Found RAPL domain package
[   21.114751] intel_rapl: Found RAPL domain core
[   21.114752] intel_rapl: Found RAPL domain uncore
[   21.114754] intel_rapl: Found RAPL domain dram
[   23.814118] snd_hda_intel 0000:00:1f.3: azx_get_response timeout, switching to polling mode: last cmd=0x000f0000
[   24.822096] snd_hda_intel 0000:00:1f.3: No response from codec, disabling MSI: last cmd=0x000f0000
[   25.830131] snd_hda_intel 0000:00:1f.3: Codec #0 probe error; disabling it...
[   26.491885] snd_hda_codec_generic hdaudioC0D2: autoconfig for Generic: line_outs=0 (0x0/0x0/0x0/0x0/0x0) type:line
[   26.491889] snd_hda_codec_generic hdaudioC0D2:    speaker_outs=0 (0x0/0x0/0x0/0x0/0x0)
[   26.491890] snd_hda_codec_generic hdaudioC0D2:    hp_outs=0 (0x0/0x0/0x0/0x0/0x0)
[   26.491892] snd_hda_codec_generic hdaudioC0D2:    mono: mono_out=0x0
[   26.491893] snd_hda_codec_generic hdaudioC0D2:    dig-out=0x3/0x0
[   26.491895] snd_hda_codec_generic hdaudioC0D2:    inputs:
[   26.493219] input: HDA Intel PCH HDMI as /devices/pci0000:00/0000:00:1f.3/sound/card0/input14
[   39.754261] snd_hda_intel 0000:00:1f.3: azx_get_response timeout, switching to single_cmd mode: last cmd=0x202a0000


$ cat /proc/asound/card*/codec*
Codec: Intel Generic
Address: 2
AFG Function Id: 0x1 (unsol 0)
Vendor Id: 0x80862809
Subsystem Id: 0x80860101
Revision Id: 0x100000
No Modem Function Group found
Default PCM:
N/A
Default Amp-In caps: N/A
Default Amp-Out caps: N/A
State of AFG node 0x01:
  Power: setting=UNKNOWN, actual=UNKNOWN, Error, Clock-stop-OK, Setting-reset
Invalid AFG subtree