Rule file requires "touch" to set group after restart.

Rule file requires "touch" to set group after restart.

[Hawkeye King]

Hello,

  I'm having a problem with a udev rule for a custom USB IO board.
    After a reboot, the group ownership will not be set, unless I
"touch /etc/udev/rules/10-BRL_USB.rules"

  Has anyone seen this before?  Can you tell me what's going wrong and
how to fix it the "right" way?

  Here is the rule, which is installed at /etc/udev/rules/10-BRL_USB.rules
             SUBSYSTEMS="usb",ATTRS{manufacturer}="UW BioRobotics
Lab",NAME="brl_usb_%s{serial}",GROUP="devgroup",MODEw7

  Here is the sequence of events I'm talking about.  Notice that the
group ownership is updated the second time the device is powered on:

               << computer restarted, device powered on >>
             [user@host usb_driver]$ ls -l /dev/brl*
             crw-rw---- 1 root root 180, 192 2010-10-14 13:31 /dev/brl_usb_6

             [user@host usb_driver]$ sudo touch
/etc/udev/rules.d/10-BRL_USB.rules
             Password:

               << device is turned off, then on again >>
             [user@host usb_driver]$ ls -l /dev/brl*
             crw-rw---- 1 root devgroup 180, 192 2010-10-14 13:48 /dev/brl_usb_6

   I think I have udev version 118, on Fedora 8.

Any help is appreciated!

Sincerely,
Hawkeye
BioRobotics Laboratory
University of Washington
Seattle
http://brl.ee.washington.edu

Re: Rule file requires "touch" to set group after restart.

[Greg KH]

On Thu, Oct 14, 2010 at 02:36:55PM -0700, Hawkeye King wrote:
>    I think I have udev version 118, on Fedora 8.

I don't think Fedora 8 is supported anymore, why not upgrade to a modern
release?

thanks,

greg k-h

Re: Rule file requires "touch" to set group after restart.

[Hawkeye King]

On Oct 14, 2010, at 6:17 PM, Greg KH wrote:

> On Thu, Oct 14, 2010 at 02:36:55PM -0700, Hawkeye King wrote:
>>   I think I have udev version 118, on Fedora 8.
> 
> I don't think Fedora 8 is supported anymore, why not upgrade to a modern
> release?
> 
> thanks,
> 
> greg k-h


Dear Greg,

	The install I have now (mostly) works, and therefore I don't want to fix it!  At least not right now.  =D 

	I think I've found the cause of the problem: the host uses a NIS login server and that is serving the group info.  If I specify a local group, then the device group ownership is set properly.  

	I discovered this after testing on an Ubuntu 10.10 box that isn't connected to the NIS server, so thank you for a helpful hint!

Best regards,
Hawkeye


---------------------------
H. Hawkeye King, MSEE

Dept. of Electrical Engineering
University of Washington
Seattle, WA, USA
http://brl.ee.washington.edu