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doc:faq:start [2015/08/21 00:36]
mikedep333 NX FAQ -> NX Protocol FAQ 		doc:faq:start [2015/08/21 01:28]
mikedep333 [Can I install FreeNX and X2Go Server on one system?] Updates for 3.5.0.x, upstream development, and NX3 discontinuation
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 No. It is not possible to use NX client to log on to an X2Go server and vice versa. No. It is not possible to use NX client to log on to an X2Go server and vice versa.
  
-Even though X2Go uses the same libraries, X2Go aims for an even greater integration into the Linux environment.+X2Go does use the same libraries for graphics, keyboard/mouse input, and clipboard sharing. However, X2Go aims for an even greater integration into the Linux environment. Therefore, X2Go performs session handling in an incompatible manner.
  
 X2Go also performs SSH authentication in a different manner than NoMachine does. X2Go also performs SSH authentication in a different manner than NoMachine does.
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 ==== Can I install FreeNX and X2Go Server on one system? ==== ==== Can I install FreeNX and X2Go Server on one system? ====
  
-Yes - the NX libraries of X2Go are actually the most recent versions of NXv3 libs available (including our own patch set). NoMachine is about to drop the NXv3 development branch completely and NXv4 will be released as closed source only :-(. +Yes - the NX libraries of X2Go are actually the most recent stable versions of NXv3 libs available. They are 3.5.0.x. They include the patchset developed by X2Go and [[https://github.com/ArcticaProject/nx-libs|others]]. NoMachine dropped the NXv3 development branch completely and NXv4 was released as closed source only :-(.
- +
-Due to these circumstances in the future the X2Go project will be upstream source for NXv3 libs for quite some distributions like Debian or Ubuntu. +
  
 In former times the NX libs shipped with X2Go installed into an X2Go'ish location so that they would not interfere with the original NX libraries.  In former times the NX libs shipped with X2Go installed into an X2Go'ish location so that they would not interfere with the original NX libraries. 
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 Nowadays the NX libs shipped with X2Go work as a replacement for the NXv3 that are not maintained by NoMachine anymore. Nowadays the NX libs shipped with X2Go work as a replacement for the NXv3 that are not maintained by NoMachine anymore.
  
-(This FAQ article has been written by Mike Gabriel, if someone does not agree with the given information on NoMachine, please be so kind to contact me, so that we can discuss it and possibly correct errors in the given information).+(This FAQ article has been written by Mike Gabriel and Mike DePaulo. If someone does not agree with the given information on NoMachine, please be so kind to contact us, so that we can discuss it and possibly correct errors in the given information).
  
-==== Why are you using the terms "nx-libs" and "NX libraries" when X2Go uses the 2 executables nxproxy & nxagent?  ====+==== Why are you using the terms "nx-libs" and "NX libraries"? X2Go clearly uses the 2 executables nxproxy & nxagent?  ====
  
 Basically: Basically:
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 Having separate tarballs made maintenance more difficult, so they were combined into one as the X2Go project started redistributing them. Having separate tarballs made maintenance more difficult, so they were combined into one as the X2Go project started redistributing them.
 +
 +==== Why not just use X11 forwarding over SSH? This is what Keith Package recommended. ====
 +
 +You are probably referring to the [[http://keithp.com/~keithp/talks/lbxpost/|LBX post-mortem]]
 +
 +It is true that X11 forwarding's performance can be improved by SSH's zlib compression and by the use of XCB rather than xlib.
 +
 +However, nx-libs performs 3 additional performance improvements:
 +
 +  - nx-libs caches images, so that they do not have to be resent. For example, opening up your "start menu" is very fast the 2nd and 3rd time that you do so.
 +  - zlib is generic lossless compression, so it is not well-suited for images. nx-libs acheives better performance by using compression methods such as JPEG (default, lossy) or PNG (lossless.)
 +  - XCB applications are still partially hindered by round-trips, and nx-libs eliminates more of those round-trips. See  [[https://lwn.net/Articles/343506/|Bart Massey's explanation]] for more info.
 +
 +The 1st 2 performance improvements also reduce bandwidth usage; which has the effect of improving performance when other users are sharing the same WAN link.
 +
 +==== Why Am I told to enable X11 forwarding with X2Go? I thought that X2Go uses nx-libs instead of X11 forwarding! ====
 +
 +The simple answer is that the OpenSSH server treats the connection differently (in such a way that degrades nx-libs performance) unless X11 forwarding is enabled.
 +
 +[[https://www.nomachine.com/AR05D00391|See NoMachine's explanation for more info.]]
  
 ==== What is the difference to LTSP? Why a free thin client environment? ==== ==== What is the difference to LTSP? Why a free thin client environment? ====
doc/faq/start.txt · Last modified: 2021/12/21 04:04 by danger89

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