Hello, I just installed (again) debian on an Apple PowerBook G4. It is a quite old machine, but it fits my requirements. After having installed the latest supported Debian release, I upgraded to sid using the ports archive. A few think do not work, so I am asking how to fix them, if possible.
First, kernels 5.6 and 5.7 do not boot at all. I opened a bug a few days back (https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=963689). Second, the battery is not detected by upower, so it does not show up in MATE. Third, audio is not working at all. Do you have hints about how to solve these problems? I am willing to spend some of my time in order to debug and, eventually, provide patches. Thank you, Giuseppe