udevd error during boot: lookup_group vboxusers unknown

[madhatter]

Hi all,

in the last week i was not able to resolve this problem:

on my ubuntu hardy i worked for about one year with
virtualbox 2.0.x with various guests and host networking
script to setup the tap interfaces at guest os startup...

recently i updated virtualbox to version 2.1 to enjoy
easier network configuration provided, and my shared
folders between host and guest have stopped working...

Well, i thought, let's revert back to version 2.0... but...
right after removing 2.1 and reinstalling 2.0.x this message
appeared at boot time:

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udevd[####]: lookup_group: secified group 'vboxusers' unknown

this is my config:

the output of my uname -a is:

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Linux pc-name 2.6.24-23-generic #1 SMP Thu Nov 27 18:44:42 UTC 2008 i686 GNU/Linux

the results for the command grep -ln vbox /etc/udev/rules.d/* are:

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/etc/udev/rules.d/50-virtualbox-ose.rules:1:KERNEL=="vboxdrv", NAME="vboxdrv", OWNER="root", GROUP="vboxusers", MODE="0660"
/etc/udev/rules.d/60-vboxdrv.rules:1:KERNEL=="vboxdrv", NAME="vboxdrv", OWNER="root", GROUP="vboxusers", MODE="0660"

the output of my sudo groups username is:

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username adm dialout cdrom floppy audio dip video plugdev fuse lpadmin admin vboxusers tomcat

(the vboxusers group exists and my user is in the group)

some ideas on how to solve the problem?

thanks,
Armando.

[dwoodard3950]

I too have the same error and I can not seem to find the source. The problem started when I upgraded to 1.6.2. I have since upgraded to 2.1 and then tried removing it completely. None of these steps resolved the problem. I have the following details regarding my configuration;
uname -a output
Linux siracusa 2.6.24-23-generic #1 SMP Thu Nov 27 18:44:42 UTC 2008 i686 GNU/Linux
/etc/udev/rules.d/40-basic-permissions.rules
SUBSYSTEM=="usb", ENV{DEVTYPE}=="usb_device", MODE="0664", GROUP="vboxusers"
SUBSYSTEM=="usb_device", MODE="0664", GROUP="vboxusers"

Any suggestions?

[madhatter]

I tried to find among the configuration files of udev but I found nothing.