[mdlug] Minicom device permission error [Was: USB device not accepting new address]

[R Kannan]

On Mon, 2007-01-22 at 08:41, Joseph C. Bender wrote:

> R Kannan wrote:
> > LANG/ja
> > LANG/ko
> > LANG/ru
> > minicom: cannot open /dev/ttyACM0: Permission denied
> > I checked the permissions on the device 'file' and it seems to have the 
> > same permission on both machines.
> > 
> 	Care to share what those perms are?
> 
> 	Generally, if the user isn't part of the group that the port is "owned" 
> by and the perms are not at least rw for the group, it's not going to work.
> 
> 	ls -l output for my EVDO card on my laptop (Ubuntu 6.06) looks like this:
> 
> 	crw-rw---- 1 root dialout 166,0 2007-01-22 08:31 /dev/ttyACM0
> 
> 	Then in /etc/group, the dialout entry is as follows:
> 
> 	dialout:x:20:cupsys,jcbender


ls -l   /dev/ACM0

crw-rw---- 1 root uucp 166, 0 2007-01-22 19:19 /dev/ttyACM0

The group uucp includes the user who is running 'minicom'

grep uucp /etc/group
uucp:x:14:<user1>,<user2>



> 
> 	(That being said, I need to investigate why in the world Ubuntu put the 
> CUPS user in that group.)
> 
> 	YMMV of course, depending on your distro and misc whatnots.
> 
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