I think you'll be disappointed by the kernel support, especially if you want to run docker containers or anything like that.

Indeed, running docker on android requires a custom kernel: https://gist.github.com/FreddieOliveira/efe850df7ff3951cb62d...

The pixel 6 and 7 have full KVM capabilities tho: https://www.patreon.com/posts/74333551

You could also use postmarketos, mobian, etc. Have a look at the pmOS wiki for device support, most support USB OTG, and usually you don't need GPU acceleration nor screen/audio/cameras, which are usual pain points.

The pixel 6 and 7 options are awesome

This was always attractive to me, how are you running a linux host on the phone or are you just using native android hosted services?

I use a custom firmware with Termux. It's enough for me.

https://medium.com/junior-dev/how-to-re-purpose-your-old-and...

That looks good enough for me, thanks!

Don't forget to turn on option "Don't turn screen off when charging". Use a less powerful charger to power the smartphone. 5 Watt charger is enough. 2.5 Watt may work too.