🐛 | bookworm/kernel 6.6 GPIO: Failed to add edge detection

[varac]

Version

3.5.2

Branch

future/main

OS

RPI OS bookworm lite - 32bit

Pi model

3 B+

Hardware

• Suptronics x400 Soundcard
• MFRC522 RFID Reader
• GPIO buttons

What happened?

After a fresh install of RPI OS bookworm lite, 32-bit with latest future/main, the GPIO buttons and the RFID reader stopped working (They worked before with the same configuration on an older 2.x installation on RPI OS bullseye).
I saw this discussion thread which confirms this issue, but I wanted to create a dedicated issue for it, to not bloat the discussion topic too much since it covers also other issues of a bookworm/future/main installation.

I can see this relevant log entry:

Exception in thread read_00Thread:
Traceback (most recent call last):
  File "/usr/lib/python3.11/threading.py", line 1038, in _bootstrap_inner
    self.run()
  File "/home/varac/RPi-Jukebox-RFID/src/jukebox/components/rfid/reader/__init__.py", line 143, in run
    self._reader = self._reader_module.ReaderClass(self._reader_cfg_key)
                   ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/home/varac/RPi-Jukebox-RFID/src/jukebox/components/rfid/hardware/rc522_spi/rc522_spi.py", line 85, in __init__
    self.device = pirc522.RFID(bus=spi_bus,
                  ^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/home/varac/RPi-Jukebox-RFID/.venv/lib/python3.11/site-packages/pirc522/rfid.py", line 103, in __init__
    GPIO.add_event_detect(pin_irq, GPIO.FALLING,
RuntimeError: Failed to add edge detection

In the discussion Sharing tips for future3 on bookworm/kernel 6.6 and upstreaming fixes #2295 @hoffie pointed out possible ways forward but I am missing concrete instructions know how to actually fix this issue on my current installation. Any help welcome, thanks already !

Logs

app.log
errors.log
INSTALL-1710188086.log

Configuration

rfid.yaml.txt
jukebox.yaml.txt
gpio.yaml.txt

More info

No response

[AlvinSchiller]

Hi, currently there is no immediate solution, other then using bullseye.

The linked discussion suggests swapping the pirc lib, so you could try this by uninstalling the old one and install from the linked repo.

But we need to look into it, cause at least the buttons should work in v3.

[hoffie]

I am missing concrete instructions know how to actually fix this issue on my current installation.

Here is what I did:

Use system lgpio (because the version on pypi is too old):
(Update: Maybe this step is no longer necessary, since 0.2.2.0 seems to be on pypi since 2024-03-29?)

rm /home/phoniebox/RPi-Jukebox-RFID/.venv/lib/python3.11/site-packages/lgpio.py /home/phoniebox/RPi-Jukebox-RFID/.venv/lib/python3.11/site-packages/lgpio-0.2.2.0.egg-info /home/phoniebox/RPi-Jukebox-RFID/.venv/lib/python3.11/site-packages/_lgpio.cpython-311-arm-linux-gnueabihf.so
ln -s /usr/lib/python3/dist-packages/lgpio.py /home/phoniebox/RPi-Jukebox-RFID/.venv/lib/python3.11/site-packages/lgpio.py
ln -s /usr/lib/python3/dist-packages/lgpio-0.2.2.0.egg-info/ /home/phoniebox/RPi-Jukebox-RFID/.venv/lib/python3.11/site-packages/lgpio-0.2.2.0.egg-info
ln -s /usr/lib/python3/dist-packages/_lgpio.cpython-311-arm-linux-gnueabihf.so /home/phoniebox/RPi-Jukebox-RFID/.venv/lib/python3.11/site-packages/_lgpio.cpython-311-arm-linux-gnueabihf.so

Configure Jukebox gpio.yaml to use LGPIO for buttons:
I'm using this in my gpio.yml and it works (other Factories may work as well, I haven't tried):

pin_factory:
  # Default is RPi.GPIO, which can't handle buttons on kernel 6.6+ anymore:
  type: lgpio.LGPIOFactory

Replace PIRC522 by PIRC522-gpiozero:

bash -c "source /home/phoniebox/RPi-Jukebox-RFID/.venv/bin/activate && pip uninstall pi-rc522 && pip install git+https://github.com/hoffie/pi-rc522-gpiozero/"`

You could also try to replace the broken RPi.GPIO by the following shim. I haven't tested it though. It might still need the above lgpio changes, but it should make the other changes redundant:
https://rpi-lgpio.readthedocs.io/en/release-0.4/install.html

[varac]

@hoffie Thanks, I can confirm that your instructions work, my rfc 522 reader works again 🎉 !
I don't know how to properly include this fix in the install script though, but it works as a reference workaround to make the rfc module working with current bookworm PiOS.

[varac]

I wonder if it would make sense to create a bookworm issue label to gather all bookworm-related issues. I'd be happy to test if needed.

[s-martin]

I tend to the lgpio and the rc522 gpiozero solution, because I think while the shim might be the most non-intrusive solution right now I'm not sure, if this will work as a long term solution.

Don't know what others think here?

@hoffie, did you make a PR to the rc522, so this fix may be included?
Nevertheless I think we could also use your branch.

[hoffie]

@hoffie, did you make a PR to the rc522, so this fix may be included?

Not yet, because the changes seemed a bit too fundamental. I'll try to find some time in the coming days.
(Sorry, I was rather unresponsive, also on my other interactions here; real life is rather busy right now)

[s-martin]

Real life always comes first ;)

[ben0r33]

So I can confirm @hoffie second solution by simple uninstalling python package rpi-gpio and instlling rpi-lgpio instead via pip to make rfid reader rc522 work again with latest linux kernel 6.6.28 on Raspbian Bookworm with RPI4:

systemctl --user stop jukebox-daemon
source .venv/bin/activate
pip uninstall rpi-gpio
pip install rpi-lgpio
systemctl --user start jukebox-daemon

Maybe the best option would be always using rpi-lgpio package moving forward?