Migration from Pi3 to Pi5: troubles

[HJLK]

202605: I migrated my rAudio 20260509 with pacman up to 20260520 from Pi3 to Pi5, and these are my issues so far:

• AUDIO I2S: My "Hifiberry DAC+" did not work anymore. I had to change that to "Hifiberry DAC+ Standard (no internal clock)", plus I had to modify it to "Disable EEPROM read". After that it was OK.
• POWER BUTTON: the STOP and START-buttons, and the LED do not work anymore, This might be due to the Python RPi.GPIO library (although I don't see any .py for POWER BUTTON).
• I still can import RPi.GPIO in python, but the GPIO-management in Pi5 is different from Pi4 and below, and that is why RPi.GPIO does not work anymore. I can also import the module gpiod, but it is low-level, and complex, plus the python interface seems too old!
  @rern : do you have plans to use another library? Say, gpiozero and/or lgpio? (These are recommended on the internet).

By the way: my ROTARY ENCODER in rAudio still works fine after migrating to Pi5, but it is not managed thru python, I think.

20260601 Update: In Arch Linux python and its modules are "externally managed" (= thru pacman). So it says when I try to install modules via pip (after I installed pip...). So I tried to install the modules lgpio and gpiozero thru pacman, but : "target not found".
I will try further (with pipx install in a user environment?), and I will report when I know more (or less).

• pacman -S python-pipx fails:

rAudio:~ # pacman -S python-pipx
resolving dependencies...
looking for conflicting packages...

Packages (5) python-argcomplete-3.6.3-1 python-click-8.3.3-1 python-distro-1.9.0-4
python-userpath-1.9.2-4 python-pipx-1.12.0-1

Total Download Size: 0.52 MiB
Total Installed Size: 3.09 MiB

:: Proceed with installation? [Y/n] y
:: Retrieving packages...
python-click-8.3.3-1-any 221.8 KiB 81.1 KiB/s 00:03 [###################################] 100% python-pipx-1.12.0-1-any.pkg.tar.xz failed to download
Total (2/5) 537.4 KiB 177 KiB/s 00:03 [###################################] 100%
error: failed retrieving file 'python-pipx-1.12.0-1-any.pkg.tar.xz' from mirror.archlinuxarm.org : The requested URL returned error: 404
warning: failed to retrieve some files
error: failed to commit transaction (failed to retrieve some files)
Errors occurred, no packages were upgraded.
rAudio:~ #

Oops...

20260611 Update: Power Button works: I use pin 7 (is free, not used by DAC) for power off, and LED on pin 11.
I do not dare to touch pin 5 anymore: my Hifiberry DAC is dead, possibly because of using pin 5: this pin is used by the DAC (now a Pi DAC PRO).
As for Python use of GPIO: I'm still trying to fix this.

20260618 Update. When migrating rAudio 20260509 from a Pi3 to a Pi5, as for Python: The Python RPi.GPIO module does not work anymore. Python is (system-wide) maintained by Arch thru pacman, When you try to install (say) gpiozero thru pacman: error: target not found: python-gpiozero. Install via pip is refused: This environment is externally managed. Bottomline: Only gpiod (a low level GPIO managing module) is present. So you have to create a "virtual environment" in Python. In that environment you can pip install gpiozero, but that fails in the end: pin-factory lgpio is not present, and all other possible factories are also not present... I will continue testing and so on...