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

Fri Feb 17 13:41:48 UTC 2017

> On 17 Feb 2017, at 14:34, Nelson Lameiras <nelson.lameiras at lyra-network.com> wrote:
> 
> 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 ?

sounds like a good idea, SPICE people will be likely able to help

> 
> 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).

ok, we’re finally adding  headless VM option, but indeed for now you do not have any better choice for HE. But at least you do not really have to use it, right? You should be able to work with it over ssh.

Thanks,
michal

> 
> any information or hint to find a solution would be appreciated. thanks
> 
> cordialement, regards,
> 
> <element-signature_logo_lyra_115x94.jpg>
>  <https://www.lyra-network.com/>
> Nelson LAMEIRAS
> Ingénieur Systèmes et Réseaux / Systems and Networks engineer
> Tel: +33 5 32 09 09 70
> nelson.lameiras at lyra-network.com <mailto:nelson.lameiras at lyra-network.com>
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> 
> 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 <mailto: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?
>  
> 
> 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 :(
> 
> What oVirt installation needs VNC? 
>  Y.
> 
> 
> 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,
> 
> <element-signature_logo_lyra_115x94.jpg>
>  <https://www.lyra-network.com/>
> Nelson LAMEIRAS
> Ingénieur Systèmes et Réseaux / Systems and Networks engineer
> Tel: +33 5 32 09 09 70 <tel:+33%205%2032%2009%2009%2070>
> nelson.lameiras at lyra-network.com <mailto:nelson.lameiras at lyra-network.com>
> www.lyra-network.com <https://www.lyra-network.com/> | www.payzen.eu <https://payzen.eu/>
> <element-signature_logo_YouTube_32x28.jpg> <https://www.youtube.com/channel/UCrVl1CO_Jlu3KbiRH-tQ_vA>
> <element-signature_logo_LinkedIn_41x28.jpg> <https://www.linkedin.com/company/lyra-network_2>
> <element-signature_logo_Twitter_42x28.jpg> <https://twitter.com/LyraNetwork>
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> Lyra Network, 109 rue de l'innovation, 31670 Labège, FRANCE
> 
> 
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