Systemd Service failure

[alfadhela]

Device: Ayaneo Air Plus
OS: Linux 6.6.4-arch1-1 #1 SMP PREEMPT_DYNAMIC Mon, 04 Dec 2023 00:29:19 +0000 x86_64 GNU/Linux

Sometimes there are a failure in the service caused by missing input events:

Dec 08 12:47:18 ayaneo nice[574]:                   ^^^^^^^^^^^^^^^^^^^
Dec 08 12:47:18 ayaneo nice[574]:   File "/usr/lib/python3.11/site-packages/evdev/uinput.py", line 282, in _find_device
Dec 08 12:47:18 ayaneo nice[574]:     d = device.InputDevice(path)
Dec 08 12:47:18 ayaneo nice[574]:         ^^^^^^^^^^^^^^^^^^^^^^^^
Dec 08 12:47:18 ayaneo nice[574]:   File "/usr/lib/python3.11/site-packages/evdev/device.py", line 127, in __init__
Dec 08 12:47:18 ayaneo nice[574]:     fd = os.open(dev, os.O_RDONLY | os.O_NONBLOCK)
Dec 08 12:47:18 ayaneo nice[574]:          ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 08 12:47:18 ayaneo nice[574]: FileNotFoundError: [Errno 2] No such file or directory: '/dev/input/event7'
Dec 08 12:47:18 ayaneo systemd[1]: handycon.service: Main process exited, code=exited, status=1/FAILURE
Dec 08 12:47:18 ayaneo systemd[1]: handycon.service: Failed with result 'exit-code'.

Simple fix is to override systemd unit file:

sudo systemctl edit handycon

and add

[Service]
Restart=on-failure
RestartSec=1s

[pastaq]

Interesting. Is there another service that is interacting with evdev file descriptors on your system?

Edit:
Also, this seems like a truncated traceback, can you post the full log?

[alfadhela]

Full service life cycle log:

Dec 08 12:47:13 ayaneo systemd[1]: Started Handheld Game Console Controller Service.
Dec 08 12:47:13 ayaneo nice[574]: [231208_12:47:13 | handycon.py:85:__init__] Starting Handhend Game Console Controller Service...
Dec 08 12:47:17 ayaneo nice[574]: [231208_12:47:17 | utilities.py:269:id_system] Identified host system as AIR Plus and configured defaults for AYA_GEN5.
Dec 08 12:47:17 ayaneo nice[574]: [231208_12:47:17 | utilities.py:287:get_config] Loading existing config: /etc/handygccs/handygccs.conf
Dec 08 12:47:18 ayaneo nice[574]: Traceback (most recent call last):
Dec 08 12:47:18 ayaneo nice[574]:   File "/usr/lib/python3.11/site-packages/evdev/device.py", line 125, in __init__
Dec 08 12:47:18 ayaneo nice[574]:     fd = os.open(dev, os.O_RDWR | os.O_NONBLOCK)
Dec 08 12:47:18 ayaneo nice[574]:          ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 08 12:47:18 ayaneo nice[574]: FileNotFoundError: [Errno 2] No such file or directory: '/dev/input/event7'
Dec 08 12:47:18 ayaneo nice[574]: During handling of the above exception, another exception occurred:
Dec 08 12:47:18 ayaneo nice[574]: Traceback (most recent call last):
Dec 08 12:47:18 ayaneo nice[574]:   File "/usr/bin/handycon", line 8, in <module>
Dec 08 12:47:18 ayaneo nice[574]:     sys.exit(main())
Dec 08 12:47:18 ayaneo nice[574]:              ^^^^^^
Dec 08 12:47:18 ayaneo nice[574]:   File "/usr/lib/python3.11/site-packages/handycon/handycon.py", line 200, in main
Dec 08 12:47:18 ayaneo nice[574]:     handycon = HandheldController()
Dec 08 12:47:18 ayaneo nice[574]:                ^^^^^^^^^^^^^^^^^^^^
Dec 08 12:47:18 ayaneo nice[574]:   File "/usr/lib/python3.11/site-packages/handycon/handycon.py", line 95, in __init__
Dec 08 12:47:18 ayaneo nice[574]:     devices.make_controller()
Dec 08 12:47:18 ayaneo nice[574]:   File "/usr/lib/python3.11/site-packages/handycon/devices.py", line 653, in make_controller
Dec 08 12:47:18 ayaneo nice[574]:     handycon.ui_device = UInput(
Dec 08 12:47:18 ayaneo nice[574]:                          ^^^^^^^
Dec 08 12:47:18 ayaneo nice[574]:   File "/usr/lib/python3.11/site-packages/evdev/uinput.py", line 155, in __init__
Dec 08 12:47:18 ayaneo nice[574]:     self.device = self._find_device()
Dec 08 12:47:18 ayaneo nice[574]:                   ^^^^^^^^^^^^^^^^^^^
Dec 08 12:47:18 ayaneo nice[574]:   File "/usr/lib/python3.11/site-packages/evdev/uinput.py", line 282, in _find_device
Dec 08 12:47:18 ayaneo nice[574]:     d = device.InputDevice(path)
Dec 08 12:47:18 ayaneo nice[574]:         ^^^^^^^^^^^^^^^^^^^^^^^^
Dec 08 12:47:18 ayaneo nice[574]:   File "/usr/lib/python3.11/site-packages/evdev/device.py", line 127, in __init__
Dec 08 12:47:18 ayaneo nice[574]:     fd = os.open(dev, os.O_RDONLY | os.O_NONBLOCK)
Dec 08 12:47:18 ayaneo nice[574]:          ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 08 12:47:18 ayaneo nice[574]: FileNotFoundError: [Errno 2] No such file or directory: '/dev/input/event7'
Dec 08 12:47:18 ayaneo systemd[1]: handycon.service: Main process exited, code=exited, status=1/FAILURE
Dec 08 12:47:18 ayaneo systemd[1]: handycon.service: Failed with result 'exit-code'.

I think it's late input initialize.

And I don't use any evdev service alongside handycon.