Fails to go online - ok last night

[fiik1]

I have 3+ computers running from one modem - hard ethernet and wifi iphones. My sons' phones drop out frequently requiring the modem to be restarted - but that does'nt bother me too much.
Last night running fine.
Booted up this morning sitting next to my wife who was happily browsing away.
No go for me - even after several reboots.
My computer seems to recognise the modem but refuses to logon.
I also have LMDE installed on a 16GB flash drive and am running on that now - logged on and working fine. So it is not a hardware problem.
Any ideas out there?

FIIK

[vrkalak]

I have a similar problem with one of my laptops.

The Modem is not always recognized, right away.

This is my work-around for that.

If the Modem shows up in Network-Manager great, other wise . . .
I have to log out and boot into a LiveCD of any Mint/Debian OS-distro and 'set-up' a new connection.
Then, I can log out of the LiveCD and Log-in to the installed LMDE.
Usually, works fine after this ... and it does not drop the connection.

The Modem is then, usually 'seen' by the Network-Manager.

Don't ask my why this works, but it does.

[fiik1]

Thank you for that. Tried doing it the lazy way first and rebooted into LMDE hdd, deleted the auto eth and set-up another one.

Worked first go. I have done things like that before and fixed problems - I think that the morning caffeine just hadn't kicked in.

All good now, thank you.

[ddalley]

Strangely, my install of LXDE did the exact same thing, this morning!
I'll have to give your solution a go, if I can figure out your instructions.

Fortunately, I had another old install I could rely on, otherwise I wouldn't even be here.

[Davarish]

Here's another one
I use a cable connection and i always turn off my modem when i turn off my computer. When I start my computer and the modem synchronises and says everything is fine my network manager can't connect. I have to restart the modem and only then will the network manager connect. I don't know why this happens but it is stupid realy. If i try to let the computer boot and get the LMDE running and ready AND THEN press on my modem the same stupid thing happens.