Seak, Thanks for the feedback. The Auto-Select behaviour is specifically designed to switch up the colour level but not back down again. As you point out, this doesn't work so well if your connection has short-lived periods of high throughput but low throughput more normally. In this case you should disable the Auto-Select feature and manually select the compression & colour level. The latest VNC Enterprise and Personal Edition viewers have a new, easier to use interface for this.
HTH, -- Wez @ RealVNC Ltd > -----Original Message----- > From: vnc-list-ad...@realvnc.com [mailto:vnc-list-ad...@realvnc.com] On > Behalf Of Seak, Teng-Fong > Sent: 19 March 2009 14:00 > To: vnc-list@realvnc.com > Subject: Re: How to prevent "colour level" from going up? > > To Alex, > > OIC. Yes, I agree with you that it's quite a bug (of design). I > would > expect another "Auto Select" check-box on top of the column of "Colour > Level". What encoding is best to use, by the way? I figure that I'd > better > not using "Raw" as this increases the quantity of data transferring > from > server to client. But what to choose between "ZRLE" and "Hextile"? > Both > are compressed data? > > To James, > > Sorry, I lied when I said it's over a low bandwidth :p To the > contrary, it's actually over a high bandwidth, but .... there're > situations > where it's better to consider *as if* we're using low bandwidth. Eg > 1. It's possible to have 1Mbit/s up to 7Mbit/s using 3G mobile access > to > Internet. However, it's quite often that such access is on a > pay-per-megabyte basis, ie what you pay depends on the quantity of data > transfered. So it's quite natural to reduce the colour level as much > as > possible. > 2. In my home, my Internet access is also high bandwidth, but I notice > that > the data transfer is like sort of pulses, ie during some seconds, data > are > transferred, but during the next few seconds, it's as if nothing's got > through. So in average, the bandwidth is quite low. > > Back to my original post, > > I had done like this: established a connection, changed the Colour > Level to low, save the config to a VNC file, and re-open the connection > by > double-clicking the VNC file. But the Colour Level is still set back > to > high after a few seconds, and then due to the "pulse" problem I > mentioned > before, VNC connection is very slow. > > > > On Wed, Mar 18, 2009 at 5:09 PM, James Weatherall <j...@realvnc.com> > wrote: > > > Hi Alex, > > > > The Colour Level remains selectable so that the user can choose which > of > > the Low Colour levels to use for slow connections, or opt to force > the > > session to run in Full Colour even when the connection is slow. The > > Auto-Select feature always controls the encoding when enabled, since > the > > choice of encoding does not affect the quality of desktop imagery in > current > > releases. > > > > Note that the latest VNC Enterprise Edition Viewer releases simplify > > selection of colour level and encoding. > > > > Regards, > > > > -- > > Wez @ RealVNC Ltd > > > _______________________________________________ > VNC-List mailing list > VNC-List@realvnc.com > To remove yourself from the list visit: > http://www.realvnc.com/mailman/listinfo/vnc-list _______________________________________________ VNC-List mailing list VNC-List@realvnc.com To remove yourself from the list visit: http://www.realvnc.com/mailman/listinfo/vnc-list
