Unable to use cli - The device has no langid

[kalenmike]

I am unable to get the cli to start.

System info:

Ubuntu 22.04.3 LTS
i3 4.22
Bus 001 Device 007: ID 046d:c900 Logitech, Inc. Litra Glow

Steps to reproduce:

pip install litra-driver

sudo tee /etc/udev/rules.d/82-litra-glow.rules <<< 'SUBSYSTEM=="usb", ATTR{idVendor}=="046d", ATTR{idProduct}=="c900",MODE="0666"'

lc --help

Traceback (most recent call last):
  File "/home/ace/.local/bin/lc", line 5, in <module>
    from llgd.cli.cli import main
  File "/home/ace/.local/lib/python3.10/site-packages/llgd/cli/cli.py", line 8, in <module>
    from llgd.lib.llgd_lib import light_on, light_off, set_brightness, set_temperature
  File "/home/ace/.local/lib/python3.10/site-packages/llgd/lib/llgd_lib.py", line 153, in <module>
    find_devices()
  File "/home/ace/.local/lib/python3.10/site-packages/llgd/lib/llgd_lib.py", line 41, in find_devices
    logging.info('Found Device "%s"', product_device.product)
  File "/home/ace/.local/lib/python3.10/site-packages/usb/core.py", line 875, in product
    self._product = util.get_string(self, self.iProduct)
  File "/home/ace/.local/lib/python3.10/site-packages/usb/util.py", line 313, in get_string
    raise ValueError("The device has no langid"
ValueError: The device has no langid (permission issue, no string descriptors supported or device error)

[gabeguz]

I needed to reboot before it worked for me, I was getting the same error.

[sethforprivacy]

After installing the udev rules you can usually just unplug/re-plug the device into your computer to activate them -- that's what worked for me as it does with most udev rule issues.

[kharyam]

Just a heads up that I've released a go version of this application , a single native executable for the cli and ui. Let me know if you can give it a try!