Hello,
I got both UltraVNC and pcAnywhere to compare how fast they each were. I wanted my background transmitted so I kept that enabled. For some reason UltraVNC took very long for screen updates. For example, when I clicked on say IE, it took over a minute before it showed up on the screen.
Am I doing something wrong here? Do I have something configured incorrectly?
Thanks,
lab
Update: UltraVNC 1.4.3.6 and UltraVNC SC 1.4.3.6: viewtopic.php?t=37885
Important: Please update to latest version before to create a reply, a topic or an issue: viewtopic.php?t=37864
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Important: Please update to latest version before to create a reply, a topic or an issue: viewtopic.php?t=37864
Join us on social networks and share our announcements:
- Website: https://uvnc.com/
- GitHub: https://github.com/ultravnc
- Mastodon: https://mastodon.social/@ultravnc
- Facebook: https://www.facebook.com/ultravnc1
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UltraVNC very slow?
Re: UltraVNC very slow?
If you are running Vista, you might be interested in the discussion at
Forum Topic: UltraVNC 104
Subject: Post subject: Remote connections to Vista very slow, 104 RC13
Forum Topic: UltraVNC 104
Subject: Post subject: Remote connections to Vista very slow, 104 RC13
Al Starr
- Rudi De Vos
- Admin & Developer
- Posts: 6838
- Joined: 2004-04-23 10:21
- Contact:
Re: UltraVNC very slow?
Slow Vista:
Driver
Application mode : Driver doesn't work, permission issue.
In application mode you must start it as "runasadmin"
Hook:
Vista has a special hook dll (schook.dll and seperated downloaded)
http://sc.uvnc.com/SChook.dll
I have good results without driver and using the hook,
[v] disable earo (server option) also improve the speed a lot ( on my system the speed is identical to XP when aero disabled)
Settings (see video)
LAN ( video of viewer)
Vista
Mirror driver
winvnc (started application mode, runasadmin)
http://sc.uvnc.com/vistadriver.avi
Vista
No driver
SChook.dll
http://sc.uvnc.com/vista.avi
WAN
repeater: uvnc.com location (US phoenix) (10MB full)
server/viewer: ADSL (400k/3Mb) EU(Brussels)
Shared ADSL, server/viewer via same modem
This full simulate a WAN connection, even slower as data need to travel
up and down.
A)
http://sc.uvnc.com/test1.avi
Driver used
zrle
256 colors
Switch from driver to non driver mode made is slow...
B)
http://sc.uvnc.com/test2.avi
Non driver mode from start
Bins used for testing (VS2008)
http://sc.uvnc.com/bins_17aug.zip
Driver
Application mode : Driver doesn't work, permission issue.
In application mode you must start it as "runasadmin"
Hook:
Vista has a special hook dll (schook.dll and seperated downloaded)
http://sc.uvnc.com/SChook.dll
I have good results without driver and using the hook,
[v] disable earo (server option) also improve the speed a lot ( on my system the speed is identical to XP when aero disabled)
Settings (see video)
LAN ( video of viewer)
Vista
Mirror driver
winvnc (started application mode, runasadmin)
http://sc.uvnc.com/vistadriver.avi
Vista
No driver
SChook.dll
http://sc.uvnc.com/vista.avi
WAN
repeater: uvnc.com location (US phoenix) (10MB full)
server/viewer: ADSL (400k/3Mb) EU(Brussels)
Shared ADSL, server/viewer via same modem
This full simulate a WAN connection, even slower as data need to travel
up and down.
A)
http://sc.uvnc.com/test1.avi
Driver used
zrle
256 colors
Switch from driver to non driver mode made is slow...
B)
http://sc.uvnc.com/test2.avi
Non driver mode from start
Bins used for testing (VS2008)
http://sc.uvnc.com/bins_17aug.zip
Re: UltraVNC very slow?
Sorry I am running XP..
Any ideas for XP?
Any ideas for XP?
- Rudi De Vos
- Admin & Developer
- Posts: 6838
- Joined: 2004-04-23 10:21
- Contact:
Re: UltraVNC very slow?
Same , Vista is slower then XP because it use a lot of animation on his desktop... on XP is should be faster.
schook also work on XP
driver doesn't require "runasadmin"
schook also work on XP
driver doesn't require "runasadmin"