there is a app for this https://github.com/TigerBeanst/TigerInTheWall
ebd6a8c9051028dc1607
have you tried edit /system/vendor/etc/mixer_paths.xml
file ? it may include volume and gain config
im already using archlinux arm on my phone for some years. there is really nothing i need to degoogle at now. the only google product im using is gmail (3rd part client) and play games (run in waydroid).
i think these video may explained it
https://www.youtube.com/watch?v=4XNvnKDSoEw
https://www.youtube.com/watch?v=tD5Dd6VDr7c
https://www.youtube.com/watch?v=qZHoIS-10GQ
yes you can. but not for recent released tablets. you can find more on devices page of pmos wiki
android tablet have many way to run a linux user land . but most of them are still using downstream android kernel. which means you wont get any 3d acceleration in your "linux" environment. so i would suggest you some sbc based tablet or some chromebook (then install linux on it manually)
im using cloudflare doh as upstream. and setting my own dns server (dnsmasq) with ad block hosts on my router
but it just the ec part. bios is still the proprietary insyde bios
to be noticed. framework laptop still dont have coreboot support yet.
where did you moved to? i tried matrix but their android client (element) is terrible compare to telegram's.