Xorg 1.8 - How does udev replace HAL?

Okay guys, I've understood that you can run custom commands to e.g. automount USB sticks or symlink devices with udev. That's pretty easy, and actually a lot less work than with the XML-style .fdi files of HAL. Good riddance I guess.
But HAL played an important role in enabling zero-configuration input devices so far. This seems no longer be working at all. With simple commands, HAL was able to dynamically add devices to X. I'm desperately trying to figure out a way to do the same with udev though, and I really can't find anything on it...
I just want to enable my Wacom tablet *without* the use of an Xorg.conf (which AFAIK is deprecated), like it was possible with HAL. I know how to match my device, but not what I need to do with udev to add those input devices to the X session. Could anyone please fill me in?

lustikus wrote:usb automounting can be done with udev rules: http://wiki.archlinux.org/index.php/Ude … SB_devices
I know, that's not the point. My problem is specifically with *input* devices.
@archman-cro: You understood it wrong. The files that are already in /etc/X11/xorg.conf.d/ will get overwirrten with every update. These are files that typicall get managed by different packages. Basically, if you add a synaptics touchpad driver, that package will but its 10-synaptics.conf in there. If you use a wacom tablet (xf-86-input-wacom package), a 50-wacom.conf will get put there. These files should NOT be modified because if the package gets updated or reinstalled, the old one will be removed.
What you could do is maybe create a file that no package will ever overwrite in there, like /etc/X11/xorg.conf.d/10-local-rules.conf. Then put any local rules in there and hope no package ever wants to use 10-local-rules.conf. This also has the advantage that these rules are parsed before most of the other rules, as all etc/X11/xorg.conf.d/*.conf files are parsed in alphabetical order.
I've got a question on the InputClass section. You can use MatchProduct and Matchvendor there. But how do you find out for a given device what the value of the Product and Vendor strings are? I know you can do this for USB devices with the lsusb command, but how about serial devices?
Last edited by Natanji (2010-06-25 10:21:34)

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Xorg 1.8 - How does udev replace HAL?

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