[Bug 1863239] [NEW] /dev/bus/usb/*/* device file of HP multi-function printer assigned to "audio" group

Launchpad Bug Tracker 1863239 at bugs.launchpad.net
Sat Mar 21 18:26:07 UTC 2020


You have been subscribed to a public bug by Till Kamppeter (till-kamppeter):

When testing HPLIP I found out that CUPS backends can access my printer
only when they are running as root, when they are running as the special
user lp, as it is usually the case, they cannot access the printer.

So I tried to find out why and saw that the /dev/bus/usb/*/* device file
for the printer has group ownership "audio" and not "lp":

till at till-x1yoga:~/ubuntu/hplip/focal/debian/hplip-3.19.12+dfsg0$ ll /dev/bus/usb/*/*
crw-rw-r--  1 root root    189,   0 Feb 11 14:17 /dev/bus/usb/001/001
crw-rw-r--  1 root root    189,   2 Feb 11 14:17 /dev/bus/usb/001/003
crw-rw-r--  1 root root    189,   3 Feb 11 14:17 /dev/bus/usb/001/004
crw-rw-r--  1 root plugdev 189,   4 Feb 14 12:23 /dev/bus/usb/001/005
crw-rw-r--  1 root root    189,   5 Feb 11 14:17 /dev/bus/usb/001/006
crw-rw----+ 1 root audio   189,  62 Feb 14 12:37 /dev/bus/usb/001/063
crw-rw-r--  1 root root    189, 128 Feb 11 14:17 /dev/bus/usb/002/001
crw-rw-r--  1 root root    189, 130 Feb 13 09:38 /dev/bus/usb/002/003
till at till-x1yoga:~/ubuntu/hplip/focal/debian/hplip-3.19.12+dfsg0$

The printer is the device /dev/bus/usb/001/063:

till at till-x1yoga:~/ubuntu/hplip/focal/debian/hplip-3.19.12+dfsg0$ lsusb
Bus 002 Device 003: ID 0b95:1790 ASIX Electronics Corp. AX88179 Gigabit Ethernet
Bus 002 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub
Bus 001 Device 005: ID 138a:0097 Validity Sensors, Inc. 
Bus 001 Device 004: ID 04f2:b5ce Chicony Electronics Co., Ltd Integrated Camera
Bus 001 Device 003: ID 8087:0a2b Intel Corp. 
Bus 001 Device 006: ID 056a:50b7 Wacom Co., Ltd Pen and multitouch sensor
Bus 001 Device 063: ID 03f0:7a12 HP, Inc HP OfficeJet Pro 8730
Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
till at till-x1yoga:~/ubuntu/hplip/focal/debian/hplip-3.19.12+dfsg0$ 

There must be a bug somewhere in the UDEV rules.

** Affects: libmtp (Ubuntu)
     Importance: Critical
         Status: In Progress

** Affects: pulseaudio (Ubuntu)
     Importance: Critical
         Status: Invalid

** Affects: systemd (Ubuntu)
     Importance: Critical
         Status: Invalid

** Affects: udev (Ubuntu)
     Importance: Critical
         Status: Invalid


** Tags: focal patch rls-ff-incoming
-- 
/dev/bus/usb/*/* device file of HP multi-function printer assigned to "audio" group
https://bugs.launchpad.net/bugs/1863239
You received this bug notification because you are a member of Ubuntu Sponsors Team, which is subscribed to the bug report.



More information about the Ubuntu-sponsors mailing list