Hi Giuseppe!

Battery:
If the battery status is not displayed correctly then open up the terminal and type:
sudo modprobe pmu_battery

To make this permanent type the following:
sudo nano /etc/modules

Add the line

pmu_battery

sound:
To get sound working install alsa-utils and launch alsamixer

sudo apt install alsa-utils
alsamixer

Then hit fn+F6 (SoundByLayout)
go to the right and make sure you have PCM at 80<>80
ESC to exit alsamixer

You should have sound now…

Regards,
Jeroen

Giuseppe Sacco schreef op 2020-06-29 22:22:
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

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