network manager has gone crazy

[Timothy Murphy]

lee wrote:

>> As I understand it, you have asked NM to manage your ethernet connection
>> (in /etc/sysconfig/network-scripts/ifcfg-em1).
>> I believe that NM over-writes /etc/resolv.conf if it cannot establish
>> the specified connection.
>> In my opinion this is silly; but that is what NM does.
> 
> What it probably does is managing em2 which doesn't exist anymore
> because I turned off the network adapter in the BIOS.  Since em1 wasn't
> used before, it perhaps tries to keep it disabled by overwriting
> resolv.conf.
> 
> Isn't there any way to configure networkmanager?
> 
>> If you don't want NM to manage your connection you should say so
>> in the above ifcfg file.
>>
>> Or at least that is my understanding of the setup.
> 
> It's better to disable networkmanager when you don't want it to do
> anything.  Why keep a service running that isn't supposed to do
> anything?

Well, I would do both -
if you don't want NM to manage any interface why say you do
(in /etc/sysconfig/network-scripts/ifcfg-em1)?
And I don't see any point in running the NM service
if you don't want to use it.

I'm not convinced you have shown there is any kind of bug in NM.