On Thu, Jun 17, 2010 at 10:20, Corne Beerse <cbee...@gmail.com> wrote:
> On 15-6-2010 17:59, Seak, Teng-Fong wrote:
>> It seems that VNC response depends on screen response, ie VGA
>> card's speed. I think VNC only sends screen updates to client only
>> after corresponding pixels are changed on screen (ie in VGA memory).
>> Am I correct?
>>
>
> This is only true for the native msWindows server side implementation:
> There the vnc-server (the remote side) just grabs the contents of the
> screen-memory and forwards that. Hence, the screen update of the session
> can never be faster/better than the hardware. It's even worse: depending
> on the way the screen-memory is grabbed, the screen update can be realy
> slow.
Is real VNC for Windows such "native ms windows server side
implementation"? And is it possible to know in which way the
screen-memory is grabbed?
> To make it even worse: the hardware accelerated video display stuff does
> not use the memory for the screen, it inserts the picture 'on the fly'.
> Hence where the real display shows the movie, the vnc-session shows a
> black square.
I'm not interested in movie related problem, so this doesn't
concern me, correct?
> There are however vnc-server installations that are linked more to the
> display-driver and might do a better job on some side.
Essentially the same question as above: I'm using real VNC for
windows, so how could I know if the server installations are linked to
the display driver or not?
>> I've got a PC whose VGA card is "ATI 3D RAGE IIC PCI". On the
>> screen, the response is quite good. But when used in VNC, the
>> response is horrible -- very slow.
>>
>> Is there any plan to improve this part? Eg using threads if
>> that's not used already.
>>
>
> Try to find a vnc-server that is tailored to your display hardware.
How?
> On the other hand, using the current installation, twiggle a little with
> the way the screen is updated/captured/refreshed.
I'm already using "Use VNC hooks to track changes". Should I
disable it? But that would mean I have to switch to "Poll for changes
to the desktop". Isn't this a worse option?
Regards,
TFS
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