[FreeNX-kNX] freenx hangs

[hypo]

any solutions to this issue? i'm facing this with increasing frequency now.
Not sure what seems to cause it. I've seen this running from both vista and
xp (not running at the same time).

Client1: Vista Home Premium
Client2: Windows XP professional
Host: Ubuntu 8.10

Mario,

I have been running the following when this seems to have happened:
Firefox
Terminal (XTERM provided by GNOME, nothing special)
Emacs

To answer Mario's questions,

When NX client does "freeze" with white screen, it's process usage is
marginal on client. Ditto for Server. Oddly enough, I am able to VNC during
the freeze and see my session nice and fine. If i try to close the frozen
FreeNX client (by clicking on the top right X), the VNC window shows a query
dialog (Suspend session, Terminate or Cancel). The only way to "gracefully"
exit the NX client seems to be to click "Suspend" via the VNC window, and
then restart the NX session. 

At this point, NX recovers but the problem happens shortly afterwards (non
deterministic delay).

Any help would be most appreciated! VNC usage experience is supremely
sub-par compared to near real-time response from NX.

thanks!
hypo


Mario Becroft wrote:
> 
> Dmitry Melekhov <dm at belkam.com> writes:
> 
>> Hello!
>>
>> Our users use java based software on redhat  5.4  x86-64 server
>> connecting to this server with nxclient from windows machines.
>> Problem is that sometimes (and really often enough) their sessions
>> hungs, they see white screen, only way to solve this is to terminate
>> session and start new one. Session can be suspended, but after resume
>> they see only white screen.
>> Looks like software bug causes nx to hang. Unfortunately, I don't know
>> how to reproduce problem.
>> Could you tell me what can I do to solve this problem?
> 
> Does this happen only when runniing a certain program? If so, what is
> it?
> 
> I suggest the following method of analysis: when a user's session is in
> the frozen state, check the CPU usage of their nxagent on the NX server
> host. Is it using 100% CPU? Also check the CPU usage of nxssh and the X
> server on the NX client host.
> 
> Try killing the program that triggers the problem. Does the session
> un-freeze? If not, is there any other change in the nxagent behaviour?
> 
> When the session is in the frozen state, run strace on it and obtain a
> log of what it is doing. Analyse it or post it here.
> 
> -- 
> Mario Becroft <mb at gem.win.co.nz>
> ________________________________________________________________
>      Were you helped on this list with your FreeNX problem?
>     Then please write up the solution in the FreeNX Wiki/FAQ:
> 
> http://openfacts2.berlios.de/wikien/index.php/BerliosProject:FreeNX_-_FAQ
>   
>          Don't forget to check the NX Knowledge Base:
>                  http://www.nomachine.com/kb/ 
> 
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