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I have two computers in a LAN, one for leisure and one for hobby. The latter I connect to via Remmina VNC.

This is what the desktop of the hobby computer looks like.

hobby

The speed of my mouse cursor is okay, but dragging around a window is very slow and choppy. As you can see in the upper right corner, The CPU shows that it's around 20% (on the Arch Box), that is, while I drag the terminal around. Otherwise it sits at under 1%. I have it on full-screen 1920x1080 and because I program on it, so I like to keep it at that size.

What do I need to do to get it to run at an adequate speed? If dragging windows around would go smoothly I'm happy.

Should I change settings? Use another app/protocol? Is it due to make Cat5 cables? Low CPU power?

These are my settings for Remmina.

remmina

Details LAN

One home/client computer

  • CPU benchmark 25xx according to cpubenchmark (terribly slow, I know)
  • Ubuntu 16.04 Unity 7
  • Fritz!Box Powerline 1000E
    • Cat 5 cable (1m)

One hobby/server computer

  • CPU benchmark 18xx according to cpubenchmark
  • ArchBang OS
  • Cat 5 cable (10m)

FRITZ!Box 7360 Modem

  • 2x 1Gbit LAN connection
  • Fritz!Box Powerline 1000E
    • Cat 5 cable (0.3m)
Community
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Folaht
  • 171

2 Answers2

2

We need more information for a better answer, but based on what you have posted, it seems like that the 20% utilisation is occurring on your Arch box. I do not think this is a VNC problem, but seems more like that the Arch box is being taxed to move that terminal window around before VNC transmits the screen over your network connection. In other words your Arch system is rendering then transmitting the pixels on the screen for the Arch box. During the re-rending of the screen position, it is the CPU of the Arch box that being used to redraw screen.

Since VNC just retransmits that screen my advice is to use a more efficient protocol such as RDP or NX which would offload some of the rending load to the client Ubuntu system.

https://wiki.archlinux.org/index.php/FreeNX

You might want to be a bit clearer in defining your problem. Which computer has the 20% cpu utilisation which moving the Window around? Also what are specifications of each of your computers, actual CPU, amount of RAM, video chipsets?

It may well be the case that your computers are just not up to the task.

David
  • 2,362
0

Make sure to try without SSH tunneling if it's enabled.

SSH tunneling slowed everything down for some reason on my machines, probably a bad implementation, a bug.

That your cpu goes up to 20% is okay.

You should also choose a higher color resolution, I like the highest, 'true colors'. It doesn't affect performance at all on my machines.

Turning off ssh tunneling did it for me, anything else did not have much effect.

And yes, I know this is old but I had the same issue and I think some will have too.

I recommend using the rdp protocol instead of vnc, too.

france1
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