Warning: this is an extremely petty quality-of-life question.
I have multiple devices on my desk, and I like to have the audio from all of them run through my desktop (to easily control relative volume levels) and then out through my speakers or headphones. I have a Surface Laptop connected to a Surface Dock, which runs to the microphone port on the back of my desktop, which is set to be listened to and played back. I have a similar setup for some game consoles. The audio goes to the monitor over HDMI, which I then reroute out the headphone jack into the line-in port on my desktop. I can cycle through the audio outputs with a macro I have, and pretty much every app on my desktop computer respects it immediately. However, the laptop and game consoles don't. I have to switch them manually as shown in the screenshot. While there is an option for using the default playback device, it doesn't seem to work properly.
I would like to try out Linux, specifically Pop!_OS, but I can't abandon Windows just yet, so I'm trying to install Linux on a separate hard drive. I have disabled fast startup in Windows and I believe secure boot is disabled in my BIOS (although my Asus motherboard makes it hard to know for sure because there isn't an option to just turn it off; I had to follow a guide). Anyway, when I boot from my USB stick I get this message: "Can not mount /dev/loop0 (/cdrom//casper_pop-os_20.10_amd64_intel_debug_24/filesystem.squashfs) on /filesystem.squashfs". I do not have an Nvidia GPU.
