Re: after execute test file d/l from git, wireless not ready, also cannot connect through Ethernet.

[Jirka Klimes <jklimes redhat com>]

On Thursday 16 of December 2010 04:00:15 inthawadee C. wrote:
> Sorry for the vague information.
> 
> First I downloaded the source file as described in NM developer webpage.
> 
> >> git clone
> >> git://anongit.freedesktop.org/NetworkManager/NetworkManager.git cd
> >> NetworkManager
> >> ./autogen.sh --prefix=/usr --sysconfdir=/etc --localstatedir=/var
> >> make
> >> sudo make install
> 
> after doing follows the commands above and install packages it requested. I
> execute some files including
> 
> ./NetworkManagers/examples/C/add-connection-glib
> ./NetworkManagers/examples/C/get-active-connections
> ./NetworkManager/libnm-glib/libnm-glib-test
> 

That 's all right.

> NM still worked fine even I restart the computer for several times.
> However on the following day after turning the computer on, the NM-applet
> icon is spinning as if it tried to connect. It also shows that wireless not
> ready. The cable is always plugged.
> 
> From nmcli command, it shows the status as connecting.
> 
> Dec 16 08:05:42 BMW dhclient: DHCPACK of 192.168.106.12 from
> 192.168.106.254 Dec 16 08:05:42 BMW dhclient: execve
> (/usr/libexec/nm-dhcp-client.action, ...): Permission denied

The problem is that DHCP transaction is not successful due to the above error.
Probably, AppArmor is preventing executing /usr/libexec/nm-dhcp-client.action, 
because that's not the path used by Ubuntu NM package. The package uses 
/usr/lib/NetworkManager/nm-dhcp-client.action, see AppArmor profile
/etc/apparmor.d/sbin.dhclient3

So you should update the profile and reload AppArmor.

More info:
https://bugs.launchpad.net/ubuntu/+source/dhcp3/+bug/358035
https://wiki.ubuntu.com/AppArmor

Jirka