Sound broke on my debian testing Lenovo w540 laptop after making several
upgrades last week.  Sound had been working fine before the upgrades.  I
reverted all of the upgrades but it did not fix the problem.  The first I
noticed something was wrong was when my sound output showed as dummy output.
The microphone still worked at that point.  Now nothing shows for output or
input devices.  pavucontrol just spins and says Establishing connection to
PulseAudio, Please wait...  but nothing else ever happens.

journalctl shows this:
Nov 04 20:52:28 brente pulseaudio[1842]: Failed to load module "module-alsa-
card" (argument: "device_id="0" name="pci-0000_00_03.0"
card_name="alsa_card.pci-0000_00_03.0" namereg_fail=false tsched=yes
fixed_latency_range=no ignore_dB=no >
Nov 04 20:52:28 brente pulseaudio[1842]: Failed to load module "module-alsa-
card" (argument: "device_id="1" name="pci-0000_00_1b.0"
card_name="alsa_card.pci-0000_00_1b.0" namereg_fail=false tsched=yes
fixed_latency_range=no ignore_dB=no >
Nov 04 20:52:28 brente pulseaudio[1842]:
org.bluez.ProfileManager1.RegisterProfile() failed:
org.bluez.Error.NotPermitted: UUID already registered
Nov 04 20:52:28 brente pulseaudio[1842]:
org.bluez.ProfileManager1.RegisterProfile() failed:
org.bluez.Error.NotPermitted: UUID already registered

 lspci
00:00.0 Host bridge: Intel Corporation Xeon E3-1200 v3/4th Gen Core Processor
DRAM Controller (rev 06)
00:01.0 PCI bridge: Intel Corporation Xeon E3-1200 v3/4th Gen Core Processor
PCI Express x16 Controller (rev 06)
00:02.0 VGA compatible controller: Intel Corporation 4th Gen Core Processor
Integrated Graphics Controller (rev 06)
00:03.0 Audio device: Intel Corporation Xeon E3-1200 v3/4th Gen Core Processor
HD Audio Controller (rev 06)
00:14.0 USB controller: Intel Corporation 8 Series/C220 Series Chipset Family
USB xHCI (rev 04)
00:16.0 Communication controller: Intel Corporation 8 Series/C220 Series
Chipset Family MEI Controller #1 (rev 04)
00:16.3 Serial controller: Intel Corporation 8 Series/C220 Series Chipset
Family KT Controller (rev 04)
00:19.0 Ethernet controller: Intel Corporation Ethernet Connection I217-LM (rev
04)
00:1a.0 USB controller: Intel Corporation 8 Series/C220 Series Chipset Family
USB EHCI #2 (rev 04)
00:1b.0 Audio device: Intel Corporation 8 Series/C220 Series Chipset High
Definition Audio Controller (rev 04)
00:1c.0 PCI bridge: Intel Corporation 8 Series/C220 Series Chipset Family PCI
Express Root Port #1 (rev d4)
00:1c.1 PCI bridge: Intel Corporation 8 Series/C220 Series Chipset Family PCI
Express Root Port #2 (rev d4)
00:1c.2 PCI bridge: Intel Corporation 8 Series/C220 Series Chipset Family PCI
Express Root Port #3 (rev d4)
00:1c.4 PCI bridge: Intel Corporation 8 Series/C220 Series Chipset Family PCI
Express Root Port #5 (rev d4)
00:1d.0 USB controller: Intel Corporation 8 Series/C220 Series Chipset Family
USB EHCI #1 (rev 04)
00:1f.0 ISA bridge: Intel Corporation QM87 Express LPC Controller (rev 04)
00:1f.2 SATA controller: Intel Corporation 8 Series/C220 Series Chipset Family
6-port SATA Controller 1 [AHCI mode] (rev 04)
00:1f.3 SMBus: Intel Corporation 8 Series/C220 Series Chipset Family SMBus
Controller (rev 04)
01:00.0 VGA compatible controller: NVIDIA Corporation GK107GLM [Quadro K1100M]
(rev a1)
01:00.1 Audio device: NVIDIA Corporation GK107 HDMI Audio Controller (rev a1)
02:00.0 SD Host controller: O2 Micro, Inc. SD/MMC Card Reader Controller (rev
01)
03:00.0 Network controller: Intel Corporation Wireless 7260 (rev 83)