VNC freezing on Win XP Media Center Edition SP2

[James Weatherall]

Hi Alex,

VNC doesn't send packets at all - it runs over TCP.

Cheers,

Wez @ RealVNC Ltd.
 

> -----Original Message-----
> From: vnc-list-admin "at" realvnc.com 
> [mailto:vnc-list-admin "at" realvnc.com] On Behalf Of Alex Pelts
> Sent: 25 April 2006 19:14
> To: James Weatherall
> Cc: 'S B'; vnc-list "at" realvnc.com
> Subject: Re: VNC freezing on Win XP Media Center Edition SP2
> 
> The VPN has MTU larger than MTU of physical network. Lots of 
> packets are 
> dropped as somehow VNC sends rather large packets. I had this problem 
> myself until I lowered MTU to below of the physical network MTU.
> 
> The symptoms were:
> 1. screen would render half way and then stop.
> 2. screen updates were extremely slow
> 3. Connection would go for some short time and then would be dropped.
> 
> I am not sure why MTU is causing that effect. I think that 
> VPN packets 
> can not be fragmented so they are dropped and there is a large packet 
> loss. I am not sure how VNC reacts to large packet loss.
> 
> Regards,
> Alex
> 
> 
> James Weatherall wrote:
> > Hi Alex,
> > 
> > Can you provide any more information on why that causes the 
> effect SB is
> > seeing?
> > 
> > Cheers,
> > 
> > Wez @ RealVNC Ltd.
> > 
> > 
> >> -----Original Message-----
> >> From: vnc-list-admin "at" realvnc.com 
> >> [mailto:vnc-list-admin "at" realvnc.com] On Behalf Of Alex Pelts
> >> Sent: 25 April 2006 07:07
> >> To: S B
> >> Cc: vnc-list "at" realvnc.com
> >> Subject: Re: VNC freezing on Win XP Media Center Edition SP2
> >>
> >> MTU is too large on your vpn connection.
> >>
> >> Regards,
> >> Alex
> >>
> >>
> >> S B wrote:
> >>> Hi,
> >>>
> >>> I just bought a new computer from Dell (Intel dual core 
> >> 2.8GHz, 1GB RAM
> >>> running Win XP Media Center w/ SP2), and downloaded VNC 4.4 
> >> viewer on it.
> >>> When I VNC to my work machine, VNC viewer freezes 
> >> intermittently. Some times
> >>> immediately after logging in and some times after 10-15 
> >> minutes of work. Did
> >>> anyone here faced a similar problem? How do I fix this problem.
> >>>
> >>> Thanks,
> >>> - SB
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