Howdy all,

The specs:

Slackware 12.2, custom built kernel (2.2.27.7)
HP PSC 1209 USB AiO printer (Bus 002 Device 004: ID 03f0:2f11 Hewlett-Packard PSC 1200)
Using udev and CUPS for printer control

Problem:

When powering on/plugging in the printer, the permissions for the device are not following those in /lib/udev/rules.d/55-hpmud.rules:


ls /dev/bus/usb/002/ -l
crw-rw-r-- 1 root root 189, 128 2009-02-08 07:20 001
crw-rw-r-- 1 root root 189, 129 2009-02-08 07:20 002
crw-rw-r-- 1 root root 189, 130 2009-02-08 07:20 003
crw-rw-r-- 1 root root 189, 136 2009-02-08 16:03 004 <-- USB Printer


ls /dev/usb/lp0 -l
crw-rw---- 1 root lp 180, 0 2009-02-08 16:03 /dev/usb/lp0

Setup the printer in CUPS and hplip. Root can access the hp-toolbox, but users cannot. User in question is a member of lp, plugdev, scanner and just about every other group someone has mentioned when dealing with udev printer issues. Still a no go.

If I change the mask on the printer device with:

chmod 0666 /dev/bus/usb/002/004

then the user(s) can access the device and hp-toolbox works.

What I've tried:

* Removed udev, rule files and reinstalled via the package for 12.2

* Removed hplip and reinstalled via the package for 12.2

* Removed hplip and downloaded the latest source tarball. Rebuilt it following their instructions.

* Tried changing the AiO line in 55-hpmud.rules to:
# Check for AiO products (0x03f0xx11).
SYSFS{idVendor}=="03f0", SYSFS{idProduct}=="??11", OWNER="lp", GROUP="lp", MODE="0666", ENV{sane_hpaio}="yes"

* Checked kernel config and removed the deprecated CONFIG_USB_DEVICE_CLASS, rebuilt, rebooted. (Saw that in another Linux forum)

* With and without the above kernel option, tried commenting out from 50-udev-default.rules:
# libusb device nodes
SUBSYSTEM=="usb", ENV{DEVTYPE}=="usb_device", NAME="bus/usb/$env{BUSNUM}/$env{DEVNUM}", MODE="0644"
(Again, saw that suggestion on another Linux forum. Currently, the line is uncommented in the rules file.)

No matter what I do, the /dev/usb/lp0 device has the permissions set properly, but the /dev/bus/usb/002/004 does not.

Suggestions?

Thanks!

-Adam

Hello Adam,

If you upgraded from 12.1, you should erase the old rules in /etc/udev/rules.d as they can conflict with the new ones in /lib/udev/rules.d

On a clean 12.2 install you should have only 70-persistent-cd.rules and 70-persistent-net.rules in /etc/udev/rules.d

PS rule of thumb: in case of a problem and if you use a custom kernel, try to reproduce it using a kernel included in the distribution -- preferably generic-2.6.27-7smp for Slackware 12.2. You only need to add an entry in lilo.conf to do that.

First, thanks Didier Spaier for your reply. You put the light on what was causing the problem.

VirtualBox installed a udev rule file in /etc/udev/rules.d. I didn't think much of it until the notion of a conflict was mentioned. Seems that was the culprit.


File - /etc/udev/rules.d/60-vboxdrv.rules

SUBSYSTEM=="usb_device", GROUP="root", MODE="0664"
SUBSYSTEM=="usb", ENV{DEVTYPE}=="usb_device", GROUP="root", MODE="0664"

Since I don't use USB devices with any of my VMs, these lines were commented out from the file and all is good.

/dev/bus/usb/002/004 = crw-rw---- root lp, just as it should be.

Thanks again!

-Adam

I am happy that my wrong hypothesis did drive you to a right conclusion

By the way, in case you did not notice it, SlackbBuilds for VirtualBox 2.1.2 have been recently released @ slackbuilds.org.

Cheers,