Talk:Udev

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usbtiny extra udev rule?

In the udev rules for usbtiny, there are 2 rules listed. Howver, adding the second one to my udev rules resulted in me not an "rc=-1" communication error when I tried to use my usbtiny. When I commented out this rule:

"SBSYSTEMS=="usb", ATTRS{idVendor}=="16c0", ATTRS{idProduct}=="0479", GROUP="users", MODE="0666"

everything worked fine. Not sure what the root of the issue is, but this rule makes the usbtiny programer unusable. -- Ssalenik (talk) 04:09, 6 March 2012‎

About udev rules

udevadm info -a -n [device name]

and

udevadm info -a -p $(udevadm info -q path -n [device name])

gives the same output but the latter is recommended by some Khampf (talk) 20:57, 5 February 2013 (UTC)

Use of 'uaccess' instead of GROUP and MODE?

Bug openobex - relies on non-existing group plugdev, conflict with systemd made me rethink the rules I have been using for Logitech_Unifying_Receiver.

Currently, the following rule is taught to the user:

SUBSYSTEMS=="usb", ATTRS{idVendor}=="1781", ATTRS{idProduct}=="0c9f", GROUP="users", MODE="0666"

What about changing it to:

SUBSYSTEMS=="usb", ATTRS{idVendor}=="1781", ATTRS{idProduct}=="0c9f", TAG+="uaccess"

As a developer note, Ubuntu versions before 13.04 Raring needs TAG+="udev-acl" instead of uaccess. For compatibility with modern and legacy systems:

SUBSYSTEMS=="usb", ATTRS{idVendor}=="1781", ATTRS{idProduct}=="0c9f", TAG+="uaccess", TAG+="udev-acl"

References:

Lekensteyn (talk) 10:16, 6 June 2013 (UTC)

Printers

Udev#Printers:

If you use multiple printers, /dev/lp[0-9] devices will be assigned randomly on boot, which will break e.g. CUPS configuration.

I don't use multiple printers, but doesn't system-config-printer handle this automatically? If so, a tip could be added. --Alad (talk) 08:38, 28 June 2014 (UTC)

It might, unfortunately its gtk3 dependency discouraged me from even trying... -- Lahwaacz (talk) 09:01, 28 June 2014 (UTC)

Mounting drives in rules

@Lahwaacz (how do I ping you?) The best reference I can find for the sytemd-mount line is here, from the issue I linked in the article. Presumably that will eventually turn up on freedesktop.org as well. I tried to address the other two issues you flagged, please feel free to remove or modify the templates you added. Thank you for checking my additions. Herodotus (talk) 07:15, 25 March 2019 (UTC)

Thanks, but the accuracy flag is due to the following statement, i.e. "As of this writing, however, it was found to be slow and unreliable." -- Lahwaacz (talk) 08:11, 25 March 2019 (UTC)
Got it. There was also a style flag which I think you left. As for the statement in question, I know that it would be "original research" on Wikipedia; I'm not sure what our standards are here. Did you test the command yourself (in a udev rule) and find it to be fast and reliable, or did you just want references? Herodotus (talk) 08:47, 25 March 2019 (UTC)
Even original research needs evidence, otherwise it's just empty statements. If something "was found", there has to be something (e.g. a bug report) especially considering that the previous sentence says that it is "recommended by systemd". -- Lahwaacz (talk) 19:34, 26 March 2019 (UTC)