Rules are not applied to node

Rules are not applied to node

[Daniel Baulig]

Hoi!

I'm currently having problems getting the rights of my graphics adapter 
set correctly. I have following rule in /etc/udev/rules.d/10-local.rules

KERNEL="card[0-9]*",           NAME="dri/%k", MODE="0666"

However, after booting if I ls -lisa my /dev/dri I get following output:

25119 0 crw-rw----  1 root root 226, 0 2006-06-01 18:02 card0

Well, I set udev_log to debug and searched my syslog for some 
Inforation. less /var/log/syslog | grep udev | grep card0 gives me 
following output:

Jun  1 18:02:11 localhost udevd-event[6621]: udev_rules_get_name: rule 
applied, 'card0' becomes 'dri/card0'
Jun  1 18:02:11 localhost udevd-event[6621]: udev_db_get_device: no db 
file to read /dev/.udev/db/class@drm@card0: No such file or directory
Jun  1 18:02:11 localhost udevd-event[6621]: udev_node_add: creating 
device node '/dev/dri/card0', major = '226', minor = '0', mode = '0666', 
uid = '0', gid = '44'
Jun  1 18:02:11 localhost udevd-event[6621]: udev_node_mknod: preserve 
file '/dev/dri/card0', because it has correct dev_t

It looks like eveything works fine, except that last line looks a little 
bit suspicious, however, I do not know what it means and google aswell 
as the mailing list archives gave me no interesting hits to 
udev_node_mknod - actually the list gave me none and google only 2 not 
of interest. I really don't know any further.

uname -r: 2.6.16-1-686
udevinfo -V: udevinfo, version 091

Greets

Daniel


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Re: Rules are not applied to node

[Greg KH]

On Thu, Jun 01, 2006 at 06:54:04PM +0200, Daniel Baulig wrote:
> Hoi!
> 
> I'm currently having problems getting the rights of my graphics adapter 
> set correctly. I have following rule in /etc/udev/rules.d/10-local.rules
> 
> KERNEL="card[0-9]*",           NAME="dri/%k", MODE="0666"
> 
> However, after booting if I ls -lisa my /dev/dri I get following output:
> 
> 25119 0 crw-rw----  1 root root 226, 0 2006-06-01 18:02 card0
> 
> Well, I set udev_log to debug and searched my syslog for some 
> Inforation. less /var/log/syslog | grep udev | grep card0 gives me 
> following output:

What does running:
	udevtest /class/drm/card0

produce as output?

thanks,

greg k-h


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Re: Rules are not applied to node

[Alexander E. Patrakov]

Daniel Baulig wrote:
> KERNEL="card[0-9]*",           NAME="dri/%k", MODE="0666"

Please post the "DRI" section of your xorg.conf. It looks like the X server is 
creating the node itself according to permissions specified there, and races 
with udev. To kill this race and let the X server manage the permissions, change 
the rule to:

KERNEL="card[0-9]*",           NAME=""

This tells udev to ignore the DRI devices.

-- 
Alexander E. Patrakov


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Re: Rules are not applied to node

[Daniel Baulig]

Hoi!

Alexander E. Patrakov wrote:
> Daniel Baulig wrote:
>> KERNEL="card[0-9]*",           NAME="dri/%k", MODE="0666"
> 
> Please post the "DRI" section of your xorg.conf. It looks like the X 
> server is creating the node itself according to permissions specified 
> there, and races with udev. To kill this race and let the X server 
> manage the permissions, change the rule to:
> 
> KERNEL="card[0-9]*",           NAME=""
> 
> This tells udev to ignore the DRI devices.

I did not have the DRI section in my xorg.conf. I added it and set 
NAME="" as you suggested and it worked out fine, thanks alot!

Greets

Daniel


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