Yesterday my machine wanted me to make some updates. After the restart, today my sound output does not work anymore when I'm connected to my ThinkPad Thunderbolt 3 Workstation Dock Gen 2.
So when I unplug the Dock everything works fine, when I plug it in again it immediately stops working. It doesn't matter if I choose the headphones, plugged directly into the laptop or the speakers of the laptop.
When I try to play a sound from my disk with e.g. "Videos" or an mp3 file in Chrome it just doesn't start at all. It stays at 0:00. If I unplug the dock it directly starts the sound.
When I do pactl list short sinks I can see that my sink is SUSPENDED even when I set it to be not SUSPENDED with pactl suspend-sink alsa_output.pci-0000_00_1f.3-platform-skl_hda_dsp_generic.HiFi__hw_sofhdadsp__sink 0
And now the weirdest part: If I go to the Sound settings and test the Output, nothing works, but if I try to change the alert sound it works. This made me think that I somehow muted everything but, I can't really find any evidence for that. Same goes if I change the sound volume. If I drag the volume in the top menu bar, it makes a sound like the alert but if I want to change the same setting in the Sound Settings I don't hear anything.
x@x-ThinkPad:~$ grep "2021-07-21" /var/log/dpkg.log | grep "status installed"
2021-07-21 09:40:09 status installed libsystemd0:amd64 245.4-4ubuntu3.10
2021-07-21 09:40:09 status installed libsystemd-dev:amd64 245.4-4ubuntu3.10
2021-07-21 09:40:09 status installed systemd:amd64 245.4-4ubuntu3.10
2021-07-21 09:40:10 status installed systemd-timesyncd:amd64 245.4-4ubuntu3.10
2021-07-21 09:40:10 status installed systemd-sysv:amd64 245.4-4ubuntu3.10
2021-07-21 09:40:10 status installed libnss-systemd:amd64 245.4-4ubuntu3.10
2021-07-21 09:40:10 status installed libpam-systemd:amd64 245.4-4ubuntu3.10
2021-07-21 09:40:10 status installed libc-bin:amd64 2.31-0ubuntu9.2
2021-07-21 09:40:13 status installed man-db:amd64 2.9.1-1
2021-07-21 09:40:13 status installed dbus:amd64 1.12.16-2ubuntu2.1
2021-07-21 09:40:16 status installed libudev1:amd64 245.4-4ubuntu3.10
2021-07-21 09:40:17 status installed udev:amd64 245.4-4ubuntu3.10
2021-07-21 09:40:17 status installed libudev-dev:amd64 245.4-4ubuntu3.10
2021-07-21 09:40:17 status installed systemd:amd64 245.4-4ubuntu3.10
2021-07-21 09:40:18 status installed man-db:amd64 2.9.1-1
2021-07-21 09:40:18 status installed libc-bin:amd64 2.31-0ubuntu9.2
2021-07-21 09:40:26 status installed initramfs-tools:all 0.136ubuntu6.6
2021-07-21 09:40:36 status installed linux-modules-5.8.0-63-generic:amd64 5.8.0-63.71~20.04.1
2021-07-21 09:40:36 status installed linux-image-5.8.0-63-generic:amd64 5.8.0-63.71~20.04.1
2021-07-21 09:40:36 status installed linux-hwe-5.8-headers-5.8.0-63:all 5.8.0-63.71~20.04.1
2021-07-21 09:40:44 status installed linux-headers-5.8.0-63-generic:amd64 5.8.0-63.71~20.04.1
2021-07-21 09:40:45 status installed linux-modules-extra-5.8.0-63-generic:amd64 5.8.0-63.71~20.04.1
2021-07-21 09:40:45 status installed linux-headers-generic-hwe-20.04:amd64 5.8.0.63.71~20.04.45
2021-07-21 09:40:45 status installed linux-image-generic-hwe-20.04:amd64 5.8.0.63.71~20.04.45
2021-07-21 09:40:45 status installed linux-generic-hwe-20.04:amd64 5.8.0.63.71~20.04.45
2021-07-21 09:40:56 status installed linux-image-5.8.0-63-generic:amd64 5.8.0-63.71~20.04.1
2021-07-21 09:40:58 status installed linux-libc-dev:amd64 5.4.0-80.90
2021-07-21 15:51:52 status installed libapt-pkg6.0:amd64 2.0.6
2021-07-21 15:51:53 status installed apt:amd64 2.0.6
2021-07-21 15:51:53 status installed linux-headers-5.8.0-55-generic:amd64 5.8.0-55.62~20.04.1
2021-07-21 15:51:54 status installed linux-hwe-5.8-headers-5.8.0-55:all 5.8.0-55.62~20.04.1
2021-07-21 15:51:55 status installed linux-modules-extra-5.8.0-55-generic:amd64 5.8.0-55.62~20.04.1
2021-07-21 15:51:56 status installed linux-image-5.8.0-55-generic:amd64 5.8.0-55.62~20.04.1
2021-07-21 15:51:58 status installed linux-modules-5.8.0-55-generic:amd64 5.8.0-55.62~20.04.1
2021-07-21 15:52:08 status installed libgupnp-1.2-0:amd64 1.2.4-0ubuntu1
2021-07-21 15:52:08 status installed google-chrome-stable:amd64 92.0.4515.107-1
2021-07-21 15:52:08 status installed apt-utils:amd64 2.0.6
2021-07-21 15:52:09 status installed linux-base:all 4.5ubuntu3.6
2021-07-21 15:52:09 status installed ubuntu-drivers-common:amd64 1:0.9.0~0.20.04.1
2021-07-21 15:52:09 status installed apt-transport-https:all 2.0.6
2021-07-21 15:52:09 status installed python3-distupgrade:all 1:20.04.35
2021-07-21 15:52:09 status installed bluez-obexd:amd64 5.53-0ubuntu3.3
2021-07-21 15:52:10 status installed bluez:amd64 5.53-0ubuntu3.3
2021-07-21 15:52:10 status installed ubuntu-release-upgrader-core:all 1:20.04.35
2021-07-21 15:52:10 status installed bluez-cups:amd64 5.53-0ubuntu3.3
2021-07-21 15:52:10 status installed libbluetooth3:amd64 5.53-0ubuntu3.3
2021-07-21 15:52:10 status installed typora:amd64 0.11.0-1
2021-07-21 15:52:10 status installed python-pip-whl:all 20.0.2-5ubuntu1.6
2021-07-21 15:52:10 status installed ubuntu-release-upgrader-gtk:all 1:20.04.35
2021-07-21 15:52:10 status installed python3-pip:all 20.0.2-5ubuntu1.6
2021-07-21 15:52:10 status installed mime-support:all 3.64ubuntu1
2021-07-21 15:52:10 status installed hicolor-icon-theme:all 0.17-2
2021-07-21 15:52:10 status installed gnome-menus:amd64 3.36.0-1ubuntu1
2021-07-21 15:52:10 status installed libc-bin:amd64 2.31-0ubuntu9.2
2021-07-21 15:52:11 status installed systemd:amd64 245.4-4ubuntu3.10
2021-07-21 15:52:13 status installed man-db:amd64 2.9.1-1
2021-07-21 15:52:13 status installed dbus:amd64 1.12.16-2ubuntu2.1
2021-07-21 15:52:13 status installed desktop-file-utils:amd64 0.24-1ubuntu3
x@x-ThinkPad:~$ grep "2021-07-22" /var/log/dpkg.log | grep "status installed"
2021-07-22 09:59:39 status installed libudev1:amd64 245.4-4ubuntu3.11
2021-07-22 09:59:40 status installed udev:amd64 245.4-4ubuntu3.11
2021-07-22 09:59:40 status installed libudev-dev:amd64 245.4-4ubuntu3.11
2021-07-22 09:59:40 status installed systemd:amd64 245.4-4ubuntu3.10
2021-07-22 09:59:42 status installed man-db:amd64 2.9.1-1
2021-07-22 09:59:42 status installed libc-bin:amd64 2.31-0ubuntu9.2
2021-07-22 09:59:49 status installed initramfs-tools:all 0.136ubuntu6.6
2021-07-22 09:59:53 status installed libsystemd0:amd64 245.4-4ubuntu3.11
2021-07-22 09:59:53 status installed libsystemd-dev:amd64 245.4-4ubuntu3.11
2021-07-22 09:59:53 status installed systemd:amd64 245.4-4ubuntu3.11
2021-07-22 09:59:54 status installed systemd-timesyncd:amd64 245.4-4ubuntu3.11
2021-07-22 09:59:54 status installed systemd-sysv:amd64 245.4-4ubuntu3.11
2021-07-22 09:59:54 status installed libnss-systemd:amd64 245.4-4ubuntu3.11
2021-07-22 09:59:54 status installed libpam-systemd:amd64 245.4-4ubuntu3.11
2021-07-22 09:59:54 status installed libc-bin:amd64 2.31-0ubuntu9.2
2021-07-22 09:59:57 status installed man-db:amd64 2.9.1-1
2021-07-22 09:59:58 status installed dbus:amd64 1.12.16-2ubuntu2.1
