[Bug 920937] Something lets CUPS backend "usb" sometimes no longer detect USB printers on openSUSE Tumbleweed (worked on openSUSE 13.2)
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http://bugzilla.suse.com/show_bug.cgi?id=920937
http://bugzilla.suse.com/show_bug.cgi?id=920937#c133
--- Comment #133 from Ian Powell
FYI regarding the issue that running plain /usr/lib/cups/backend/usb as root shows a USB printer but "lpinfo -v" and the CUPS web frontend and other printer setup tools do not show it:
It seems bug#938659 shows the root cause: "udev does not set 'rw-rw-r-- root lp' for device node for all USB printers" see in particular https://bugzilla.suse.com/show_bug.cgi?id=938659#c4
Perhaps it works for Ian Powell because he got a newer udev but I am not at all a sufficient udev expert to really know.
It all still works happily. my current udev info as per rpm -qa | grep udev - not sure what it was when things didn't work. libgudev-1_0-0-219-6.2.x86_64 udev-browse-0.3-9.2.x86_64 libinput-udev-0.18-1.1.x86_64 libudev1-219-6.2.x86_64 udev-219-6.2.x86_64 python-pyudev-0.16.1-10.3.noarch udev-configure-printer-1.5.7-2.1.x86_64 udev also set "crw-rw- r--+ root lp" for my scanner as well bus/usb/001: crw-rw-r-- 1 root root 189, 0 Jul 21 08:20 001 crw-rw-r--+ 1 root lp 189, 1 Jul 21 08:20 002 crw-rw-r--+ 1 root lp 189, 4 Jul 21 13:08 005 -- You are receiving this mail because: You are on the CC list for the bug.
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