I just replaced my AOC monitor with a new Acer ET32QU monitor, and since then, the system sounds went away, streamed videos play without any problems, Pithos and Spotify work fine. The weird thing is that while I'm listening to Spotify, the system sounds come back. I have a few Unigine Benchmarking programs that I use to test computers I'm working on, and one of them, Valley 1.0 has no sound, where the rest play fine.
The monitor is connected to the computer via HDMI, I simply disconnected the cable from the AOC and plugged it into the Acer. The powered speakers were connected to the headphone port on the AOC and are now connected to the headphone port on the Acer. I've changed nothing on the computer besides the monitor.
If anyone has any suggestions why this is happening they would be most welcome.
Here's the output from inxi:
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System: Host: Mint-MS-7C37 Kernel: 5.11.0-22-generic x86_64 bits: 64 compiler: N/A Desktop: Cinnamon 4.8.6
Distro: Linux Mint 20.1 Ulyssa base: Ubuntu 20.04 focal
Machine: Type: Desktop System: Micro-Star product: MS-7C37 v: 2.0 serial: <superuser/root required>
Mobo: Micro-Star model: MPG X570 GAMING PLUS (MS-7C37) v: 2.0 serial: <superuser/root required>
UEFI: American Megatrends LLC. v: A.D2 date: 04/09/2021
Battery: Device-1: hidpp_battery_0 model: Logitech Wireless Mouse M510 charge: 55% (should be ignored) status: Discharging
CPU: Topology: Quad Core model: AMD Ryzen 5 2400G with Radeon Vega Graphics bits: 64 type: MT MCP arch: Zen
L2 cache: 2048 KiB
flags: avx avx2 lm nx pae sse sse2 sse3 sse4_1 sse4_2 sse4a ssse3 svm bogomips: 61488
Speed: 3843 MHz min/max: N/A Core speeds (MHz): 1: 3843 2: 3843 3: 3843 4: 3843 5: 3843 6: 3843 7: 3322 8: 3843
Graphics: Device-1: AMD Raven Ridge [Radeon Vega Series / Radeon Vega Mobile Series] driver: amdgpu v: kernel bus ID: 2e:00.0
Display: x11 server: X.Org 1.20.9 driver: amdgpu,ati unloaded: fbdev,modesetting,vesa resolution: 2560x1440~75Hz
OpenGL: renderer: AMD RAVEN (DRM 3.40.0 5.11.0-22-generic LLVM 11.0.0) v: 4.6 Mesa 20.2.6 direct render: Yes
Audio: Device-1: Advanced Micro Devices [AMD/ATI] Raven/Raven2/Fenghuang HDMI/DP Audio vendor: Micro-Star MSI
driver: snd_hda_intel v: kernel bus ID: 2e:00.1
Device-2: Advanced Micro Devices [AMD] Family 17h HD Audio vendor: Micro-Star MSI driver: snd_hda_intel v: kernel
bus ID: 2e:00.6
Sound Server: ALSA v: k5.11.0-22-generic
Network: Device-1: Realtek RTL8111/8168/8411 PCI Express Gigabit Ethernet vendor: Micro-Star MSI X570-A PRO driver: r8169
v: kernel port: d000 bus ID: 27:00.0
IF: enp39s0 state: up speed: 1000 Mbps duplex: full mac: 2c:f0:5d:2a:9c:ae
Drives: Local Storage: total: 953.87 GiB used: 48.56 GiB (5.1%)
ID-1: /dev/nvme0n1 model: PCIe SSD size: 953.87 GiB
Partition: ID-1: / size: 937.40 GiB used: 48.56 GiB (5.2%) fs: ext4 dev: /dev/nvme0n1p2
Sensors: System Temperatures: cpu: 44.4 C mobo: 39.0 C gpu: amdgpu temp: 44 C
Fan Speeds (RPM): cpu: 1917 mobo: 2347 fan-7: 1979
Info: Processes: 265 Uptime: 1h 26m Memory: 15.37 GiB used: 3.46 GiB (22.5%) Init: systemd runlevel: 5 Compilers:
gcc: 9.3.0 Shell: bash v: 5.0.17 inxi: 3.0.38