Latest LQ Deal: Linux Power User Bundle
Go Back > Forums > Linux Forums > Linux - Distributions > Ubuntu
User Name
Ubuntu This forum is for the discussion of Ubuntu Linux.


  Search this Thread
Old 11-25-2007, 07:20 PM   #1
Registered: Jun 2006
Location: New England
Distribution: FC11
Posts: 48

Rep: Reputation: 15
Unable to open USB port : Permission denied After 7.10 upgrade

The printer is a canon i960. It worked fine in 7.04, after the upgrade it is no longer found using GUI tools. I set it up using CUPS http://localhost:631. Any attempt to print a test page results in the error :
Unable to open USB port device file: Permission denied
I get a similar response from checking the command
lpstat -p -d
Any pointers would be greatly appreciated.

[edit] Update:
Tried adding a different printer, this one is recognized but I get the same error message if I try to send a test page to it.

[edit] Any thoughts? Even a direction to go if not a solution. Please!!

Last edited by Fixed_it; 12-03-2007 at 05:40 AM.
Old 12-26-2007, 12:15 PM   #2
Registered: Sep 2003
Location: Stroud, UK
Distribution: Kubuntu, Debian
Posts: 149

Rep: Reputation: 15
In the latest Ubuntu kernel, they have changed the way that it deals with USB systems. I was not aware that this affected mainstream applications, such as cups, but it may be that the particular drivers for your printer are affected.

I found out about this when I was trying to get Virtual Box to let me use my USB device in a virtual Windows XP machine.

Where do the drivers come from?

[edit] Can you print a test page as root?


printer, upgrade

Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is Off
HTML code is Off

Similar Threads
Thread Thread Starter Forum Replies Last Post
mplayer: Can't open /dev/fb0: Permission denied jojoii Linux - Software 2 09-21-2008 06:56 PM
usb serial port persimission denied yhus Red Hat 2 09-11-2005 11:25 PM
cannot open shared object file: Permission denied cchristian Linux - Software 5 07-30-2005 11:52 AM
HP Deskjet (USB) & CUPS & Slackware 9.1: Unable to open USB device "usb:/dev/usb/lp0&qu arnostienen Slackware 2 01-29-2004 04:22 PM
unable to open port 25 for some reason? why? f1uke Linux - Newbie 0 04-13-2003 10:23 PM > Forums > Linux Forums > Linux - Distributions > Ubuntu

All times are GMT -5. The time now is 02:08 PM.

Main Menu
Write for LQ is looking for people interested in writing Editorials, Articles, Reviews, and more. If you'd like to contribute content, let us know.
Main Menu
RSS1  Latest Threads
RSS1  LQ News
Twitter: @linuxquestions
Facebook: linuxquestions Google+: linuxquestions
Open Source Consulting | Domain Registration