Slackware 12.2 + udev + usb printer permissions
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. |
Re: Slackware 12.2 + udev + usb printer permissions (SOLVED)
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, |
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