Arch Linux

mumpf

Member

From: Switzerland

Registered: 2006-09-05

Posts: 95

dbus hal udev: how do they relate?

I did a

# gpasswd -a username optical
# gpasswd -a username storage
# gpasswd -a username disk
and I'm not sure, which group is necessary for hal and dbus to work with my usb-stick and why. "For dbus and hal to function properly, local user accounts must be members of the following groups: optical, storage" according to the wiki http://wiki.archlinux.org/index.php/HAL. Why? What is the group disk good for?

Do I need the udev-rule of the wiki http://wiki.archlinux.org/index.php/Usi … o_a_device as well?
In my case it looks like:

BUS=="usb", ATTRS{serial}=="14AB0000000096", KERNEL=="sd?1", NAME="%k", SYMLINK+="1GB_PQ", GROUP="storage".
I'm not keen to remove entry by entry, because I don't want to touch the "running system".

bsdson.tw

Member

From: Taiwan

Registered: 2005-05-06

Posts: 161

Re: dbus hal udev: how do they relate?

m...
my understanding may not be correct, but afaik:

dbus is a sub-system for (desktop) applications to communicate, so it is not relevant to the optical/storage problem.
(By saying "sub-system", I mean that dbus includes daemon(s), library(s), programming framework,..., etc.)

and udev is to dynamically create device nodes depending on your current hardware.
while creating a device node, for example: a usb massive storage, it will set the group of the device node to "storage".
and that is why you have to add a user to "storage" group to access these devices.

as for hal, it is an hardware abstraction layer, which can do some tricks depending on hardware events, for example: while you plug in the usb stick.

Last edited by bsdson.tw (2007-11-15 02:49:47)

pelle.k

Member

From: Åre, Sweden (EU)

Registered: 2006-04-30

Posts: 667

Re: dbus hal udev: how do they relate?

I'm not keen to remove entry by entry, because I don't want to touch the "running system".

just add "hal" (hal starts dbus, so you can skip that) to DAEMONS, and you should be able to mount media with gnome/kde without much trouble.
btw, "storage" is for disks (usb/internal) and "optical" is for cd/dvd drives...

Last edited by pelle.k (2007-11-15 05:09:21)

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mumpf

Member

From: Switzerland

Registered: 2006-09-05

Posts: 95

Re: dbus hal udev: how do they relate?

thanks for the explication. I've will do so (only hal in rc.conf) and report, weather or not the stick works in xfce mount manager.