[ovirt-users] VNC console extremely slow on windows 10

Fri Feb 17 13:34:31 UTC 2017

Yaniv, 

I've done some extensive investigation, and my conclusions so far bring some new light to this issue : 

As you have hinted, this is not a problem related to windows 10, as I was able to reproduce it with any laptop/system with windows 7 or 10. In fact, I do not find any evidence that VNC console works OK with any windows (maybe is our hardware?? => we use DELL). I'm not sure anymore it did work in the past... 

This is a problem related only with VNC consoles on virtual machines using windows client. SPICE works great under windows. VNC console works OK with remote viewer under centos. 

I found out something interesting : as I said, console is so slow that it bearebly useable (1 refresh every 10 seconds) but if I alt+tab twice (change focus off and on) it will refresh immediatly. This seems to me as a client issue... not a oVirt issue. So maybe I should take this issue with remote viewer team ? 

To answer your last question : "What oVirt installation needs VNC? " Indeed, oVirt hosted-engine installation needs a console and it proposes VNC and SPICE (vnc is default). SPICE console asks for a certificate configuration that I did not spent the necessary time to make it work as VNC works right out of the box (even if there is the refresh rate problem). 

any information or hint to find a solution would be appreciated. thanks 

cordialement, regards, 

	Nelson LAMEIRAS 
Ingénieur Systèmes et Réseaux / Systems and Networks engineer 
Tel: +33 5 32 09 09 70 
nelson.lameiras at lyra-network.com 

www.lyra-network.com | www.payzen.eu 

Lyra Network, 109 rue de l'innovation, 31670 Labège, FRANCE 

From: "Yaniv Kaul" <ykaul at redhat.com> 
To: "Nelson Lameiras" <nelson.lameiras at lyra-network.com> 
Cc: "Ovirt Users" <users at ovirt.org> 
Sent: Monday, February 13, 2017 7:21:36 PM 
Subject: Re: [ovirt-users] VNC console extremely slow on windows 10 

On Mon, Feb 13, 2017 at 7:24 PM, Nelson Lameiras < nelson.lameiras at lyra-network.com > wrote: 

Hello, 

Since my company laptop has been migrated to from windows 7 to windows 10, launching a console on oVirt 4.0 (and 4.1) VMs which are configured with VNC graphics is extremely slow (around one refresh every 10 seconds). This is painfully slow and barely usable. The same console on SPICE graphics works perfectly. 

So you suspect the issue is on the client side? Can you verify with a Windows 7 laptop that the performance is good? 

BQ_BEGIN

This is specially annoying since oVirt engine installation console works only with VNC in my build. I'm installing oVirt 4.1 on a test cluster, this makes my life very hard :( 

BQ_END

What oVirt installation needs VNC? 
Y. 

BQ_BEGIN

So, now I'm not sure this is an issue with oVirt, remote-viewer (for windows) or windows 10. 

Does anybody else have this problem? any advice? 

cordialement, regards, 

	Nelson LAMEIRAS 
Ingénieur Systèmes et Réseaux / Systems and Networks engineer 
Tel: +33 5 32 09 09 70 

nelson.lameiras at lyra-network.com 

www.lyra-network.com | www.payzen.eu 

Lyra Network, 109 rue de l'innovation, 31670 Labège, FRANCE 

_______________________________________________ 
Users mailing list 
Users at ovirt.org 
http://lists.ovirt.org/mailman/listinfo/users 

BQ_END

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