"no buffer space available" on Win2K

Jean-Claude Gervais jc.gervais@videotron.ca
Wed Apr 30 15:45:00 GMT 2003


	Does "VPN software causes problems with Cygwin" apply to the VPN software
that COMES with Windows?

	For example, if someone is running W2K server and is using it as a VPN
server, will Cygwin still work correctly if the server receives calls from
W2K client machines using the Microsoft built-in VPN client?

-----Original Message-----
From: cygwin-xfree-owner@cygwin.com [mailto:cygwin-xfree-owner@cygwin.com]On
Behalf Of Harold L Hunt II
Sent: Wednesday, April 30, 2003 11:31 AM
To: cygwin-xfree@cygwin.com
Subject: Re: "no buffer space available" on Win2K


It is well-known that various VPN software causes problems with
Cygwin/XFree86.  The reasons for this are numerous, but it primarily has
to do with the fact that these VPN packages replace various Windows
system DLLs with their own versions that do not correctly duplicate all
of the functionality of the Windows networking DLLs.  There isn't
anything we can do to fix this problem, as we certainly cannot write
code to deal with x number of networking layers for Windows.

The only real solution here is to never install the VPN software to
begin with, as most of them leave their modified DLLs in place when you
uninstall them.

The problem would have nothing to do with the window manager.

I consider your problem solved, as there is nothing I can do to help.
You could ask the Cygwin list (cygwin@cygwin.com) if you have further
questions, but I would expect it to get toasty in there if you aren't
offering to help :)


Karl Waclawek wrote:
>>Finaly someone else who has had this problem, however I have experienced
>>using just cygwin ssh and just cygwin ncftp as well as once using x with
>>forwarding. So i have only ever reported it on the cygwin list (to no
>>responce.) I can give cygcheck etc if anyone wants them.
> I tried to duplicate it from home (over a VPN connection), but
> could not get it to trigger. Btw, does anyone know about performance
> problems with XWindows over VPN? It ran so slow it was unusable - data
> was about 1KB/sec, whereas my ADSL is capable of much better.
> VNC was a lot more usable, but should it not be the other way around?
> Anyway, got it again this morning. The X session just crashed.
> When I tried to start it again (using startxwin.sh), the shell returned:
> listen: No buffer space available
> xsetroot:  unable to open display ''
> Could it be caused by the window manager? I was using wmaker, not twm.
> Karl

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