From: Fryderyk Dziarmagowski <freetz>
To: pld-users-pl@lists.pld-linux.org
Subject: [FAQ] PLD udev FAQ
Date: Sun, 6 Nov 2005 21:59:31 +0100
X-Translated-By: Michał Łukaszek <prism>

Minimum recommended version is 2.6.12.x (udev hotplug won't work with the older)

…that's because it loads only modules for PCI devices that meet the requirements included in udev rules. That rules allow auto-loading feature only for internal USB devices (hubs), such as uhci-hcd or ehci-hcd.

If you want to get the modules of all devices loaded automatically, enable udevsynthetize in /etc/udev/udev.conf. This is experimental and not fully tested though.

Hotplug included in current udev replaces the old hotplug completely. Paralell work of both is rather not advisable, so after udev's installation the old hotplug is uninstalled. USB pendrive will work like a charm if you read answer no. 1.

Absolutely not. Install udev-digicam package, add yourself to the digicam group, and udev's agent will do the rest, no matter if that's a scanner or other USB input device you connected.

No. There are specialized programs for this, like gnome-volume-manager.

That's a problem of nvidia (legacy) drivers. udev has nothing to do with it. Unfortunately, you must manually create proper device files using mknod.

You can make modprobe creatte these devices for you every time the module is loaded by adding the following line to your /etc/modprobe.conf:

install nvidia /sbin/modprobe --ignore-install nvidia && { mknod /dev/nvidia0 c 195 0; mknod /dev/nvidia1 c 195 1; mknod /dev/nvidia2 c 195 2; mknod /dev/nvidia3 c 195 3; mknod /dev/nvidiactl c 195 255; /bin/true; }

Note that this should be all in one line.

The kernel's input layer is broken. It's said to be fixed in 2.6.15…

No. All *-hcd modules are loaded automatically.

They don't work because they are not there - unless you installed udev-digicam, which has the usb agent. That udev warnings in logs don't look nice, but they are absolutely harmless. This will be fixed if there will be a person willing to fix it

Set udev_log to “info” in /etc/udev/udev.conf to improve verbosity of udev, use udevmonitor (man udevmonitor) to get even more infomation, check the linux-hotplug list's archive http://marc.theaimsgroup.com/?l=linux-hotplug-devel. If still unsure, ask your question on PLD mailing lists.