[GRLUG] remote sessions

[Ben Rousch]

On Mon, Jan 10, 2011 at 9:50 AM, Darrel Clute <drclute at gmail.com> wrote:
> Eric,
>
> Can you SSH to the laptop before logging on locally?  How is the
> laptop connecting to the network, wired or wireless?  NX utilizes SSH
> and X11 forwarding and starts on call when executed properly via SSH,
> they also have some customizations which permits greater compression
> and greater handling of latency then the default X11 over SSH.
> Therefore if you cannot SSH to the device you won't be able to launch
> an NX session.
>
> Based on your description I would presume that the laptop is
> connecting via wireless and you are still using the default
> NetworkManager.  NetworkManager will start a wired connection before
> login, but not a wireless, by default.  If you are connecting via
> wireless, you may want to replace NetworkManager with WICD as the
> latter will start a wireless connection before login, and personally I
> haven't had much success with NetworkManager successfully starting a
> wireless connection before login.

I've used NX for half a decade and I've been racking my brain all
morning about this problem. You make perfect sense. I've always used
it with a wired server so I never thought about how it would behave
with a wireless server.

>
> Let me know if that helps or not.
>
>
> Sincerely,
>
>
> Darrel Clute
>
>
>
> On Mon, Jan 10, 2011 at 08:52, Eric Beversluis
> <ebever at researchintegration.org> wrote:
>> On Mon, 2011-01-10 at 08:27 -0500, Michael Mol wrote:
>>> On Mon, Jan 10, 2011 at 8:05 AM, Eric Beversluis
>>> <ebever at researchintegration.org> wrote:
>>> >
>>> > I've been accessing my Lenovo Linux laptop (my main computer) from a
>>> > Win7 laptop using NoMachine, since the screen on the Lenova is down
>>> > (hopefully to recover once the inverter I've ordered arrives).
>>> >
>>> > It seems that
>>> > 1.  When I access remotely, NoMachine starts a new session.
>>> > 2.  NoMachine cannot connect unless I have already logged into the
>>> > Lenovo.
>>> >
>>> > So my question is: What's the explanation for the fact that I need to be
>>> > logged into a session on the Lenovo before NoMachine can create a new
>>> > session? (Fortunately, even without a screen, I can type my password
>>> > into the Lenovo when Ubuntu makes its "ready" noise. But what if one
>>> > were truly running "headless"?)
>>> >
>>>
>>> I'm going to venture a guess that the NoMachine server software is
>>> actually *launched* as a process in your desktop session, so if you
>>> haven't already logged in, the server software hasn't been launched
>>> yet.
>>>
>>> For most programs, the usual solution for something like that is to
>>> have the daemon software launched as part of the init scripts, i.e.
>>> from under /etc/init.d/. I don't have any personal experience with
>>> NoMachine, though, so I don't know if it would require an X server's
>>> credentials to launch.
>>>
>>> As for the headless scenario, the simplest solution would be to run an
>>> X server which doesn't expect any real hardware, like xvfb.
>>>
>>> --
>>> :wq
>>>
>> That makes sense. Thanks.
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-- 
  Ben Rousch
  brousch at gmail.com
  http://ishmilok.blogspot.com/

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