UltraVNC

Hi Rudi,
I've been evaluating this latest release for some time. Here's a list of small bugs for you to squash!

1) Idle Detection - The Idle timeout client disconnect doesn't seem to be changeable, or is not consistent. Often I look away from the PC for a minute and then I'm disconnected (even ...

1) Set the server to timeout on an idle connection
2) Ensure your viewer is set to x3 reconnection attempts and 3 (seconds?) timeout
3) Connect to server and minimise the viewer window


Unable to repeat

1) IdleInterval=60 ( have to be bigger then 59)
2) viewer retry 3X3s
Viewer connect to server ...

http://www.uvnc.eu/download/1205/hook.zip

This contain rebuild version of the vnchook
w2K/XP version, same code different compiler
And the old versions included in 1196

As i can not repeat the high cpu usage can you test them and check what's the correct version so i can add the correct one
to ...

The latest vnchooks.dll causes marked CPU usage on the Explorer process whilst VNC session active. Previous builds do not.
It is entirely replicable.

With respect to video acceleration, CPU usage isn't a problem when a mirror driver is used. I'm not concerned with high CPU usage as long as it is ...

Disabling of write combining/graphics hardware acceleration has the effect you anticipated, much lower CPU use from WinVNC
But this is not a solution, because all window drawing is in software emulation = very high CPU for the most basic things

Thank you for the clear information regarding vnc and ...

Good news of a sort...
I was able to eliminate explorer CPU usage by disabling the "use system hook" setting (EnableHook=0)

The high CPU that I've seen throughout these tests is caused by the presence of the task manager window (I use Process Hacker 2). It shows a typical combination of text and ...

Hi Rudi,
Thanks for all your testing advice. I must say that the Explorer CPU usage was never present in previous versions (I will test with a previous build to be sure, 1196 was the most recent and relatively stable version). I've also been experimenting with TightVNC, which does not produce any ...

The viewer no longer spikes with CPU or IO anymore which is great. Nice work
Unfortunately I have another entirely replicable scenario which produces unexpected behaviour

1) Set the server to timeout on an idle connection
2) Ensure your viewer is set to x3 reconnection attempts and 3 (seconds ...

Hi Rudi,
Thanks for the update, I'm running a series of tests now

The thing I don't understand is why the explorer process becomes so busy when the server is active?!?!

I'm testing on WinXPSP3 on 1152x864x32 (no monitor attached). Line speed is 20Mbits, the connection type auto and all parameters ...

Using 1205t2 installed as service
Connected service uses 20-40% CPU and explorer.exe 20%?!
Screen update very slow even with PCs on same network
Server settings: poll full-screen only, MaxCPU=20
Not using mirror driver/ repeaters / etc
Viewer settings Auto (Hextile, ZIP:6, JPG:6) and Fixed (u2, zip ...

Calling "winvnc -uninstall" disables and removes an installed service as expected, but a winvnc executable remains (as a window-less and tray-iconless process)
Windows XP SP3 x86 using 1205t2 over clean install of 1204

plants: The time for the initial drawing isn't longer. Before you just could not see the initial drawing
( used to measure bandwidth), now it show on the screen so at least you know the connection
is in progress. The blank always existed, but wasn't visable. Could not find the reason, it doesn't ...

Hi Rudi,
Do you have any insights into the abrupt viewer crashes mentioned in my previous post?
Is there any reason for two simultaneous reverse connections (from same or different IPs) to interfere with each other? It's never been a problem before...
T

Hi Rudi,
Firstly, I'd like to report some very annoying behaviour in a specific scenario. Once again, it relates to a less-than-perfect internet signal and a reverse connection

In all cases, I have the viewer crash out without reporting errors or any of the deadlocks seen previously. The cases ...

Here are some performance results which may be useful. I would post pics, but it's not obvious how... you can check at my server http://theghetto.undo.it/UVNCPerf

Conditions in all cases:
Encoding methods manually switched at random: Tight, Hextile, U2, ZRLE (note: they are in order of increasing ...

Two suggestions:
Firstly, would it be possible for you to avoid releasing test versions packaged in setup exe's, limiting yourself to producing packages only for stable releases? I get the impression that the majority of UltraVNC users are capable of unpacking ZIP files directly replacing previous ...

The screen detection and data transmission happen simultanious and independed.
You can influence the detection frequency by lowering the max cpu ( polling server option, default this is set to 40)

Try to set it to 5, vnc make internal changes to try to keep the cpu below 5% this can take 60 sec as ...

Hi Rudi,
A quick note following a test this evening, once again using the server-initiated reverse connection method

Working Parameters:
Win7x86 Server 1.1.9.4, Ethernet Connection, Recent Integrated AMD Radeon, 1920x1080 viewport -> Win7x86 Viewer 1.1.9.5 Wifi Conn. (v. near router) - basically ...

As posted, I've used the test version viewer with excellent results on XP and Win7 x86. Stability retained over a period of over six hours
The only major anomaly to report was a file-transfer hang that resulted in a viewer crash. The server detected a loss of connection and resumed normally on ...

May I be the first to express my excitement about these new developments!! Woo hoo!
Erm... where was I? :oops:

I'm back from (very fricken windy) holiday now and I have a remote session in the morning... I will use the test viewer
I presume from what you've said, that I allow it to choose its own ...

Hi Rudi,
I've had several scenarios that all behave consistently and I have a suggestion for debugging. First, the evidence:

Variables and Parameters:
The server initiates a reverse connection to a single listener. Autoreconnect is off. No encryption used. Firewall exception set for server ...

With regard to 1.1.9.3 - it's by far the most stable version of the recent builds. No unusual behaviour, no crashes or lock-ups for both LAN and WAN. The viewer switches to the u2 encoding more often than not, which is useful under most conditions

However, I have similar / identical problems to ...

Any chance of using 7-zip compression? The LZMA method would compress better and eliminate redundancy in the total package. LZMA2 would also improve compression speed for incompressible data

I've obtained the latest schook.dlls from the Addons packages, both dated 14/08/2013 @ 15:27
Be aware: The addon setup installs dlls dependent from you OS. Not only differencing between 32- and 64-bit. 2000, XP-7 and Win8 also. If you plan to pick out the schook.dll for repackaging, be shure to ...

Got it. Thanks Rudi. Much appreciated, as always!
Feedback on 1193 to follow...

Awesome. I feel (more) in control now!

Having noticed that schook does not feature as frequently in your releases, are you in favour of vnchooks?

I ask because from a debugging point of view, would it not be better if we all tested using exact same set-up, or does it not make any difference to ...

Hi Rudi,
Could you confirm whether the Win8 binaries should include the following additional dlls?
w8hook.dll
schook.dll
(and their 64-bit equivalents)

And more generally, are vnchooks.dll and schook.dll required in all cases for correct functioning?
Thx in advance
Tiziano

Would that explain the 'flickering' one sees in the mouse pointer when everything is static?
This is a very good find!

Just an FYI if anyone is creating their own customised deployments...

Accidentally found that when calling [winvnc.exe -install] (which normally installs a service called 'uvnc_service') with an additional parameter, the service name inherits the name of the parameter

So [winvnc.exe -install ...

Hi Rudi,
I'm sorry for the reply delay. You've clearly been busy again!

I've not had a chance to test the Wifi scenario, as I've been using an ethernet connection exclusively, however it is still true to say that if the server is behind a router that has poor wifi reception or poor internet ...