GNOME via remote X server - slow root window redraw

[John Summerfied]

Toralf Lund wrote:
> Hi.
> 
> I though I might forward a question of mine that got no response on the 
> mailing list:
> 
>> Another thing I thought would be fun to try on my new Mini Mac: I'm
>> logging into GNOME on my FC3 box via XDMCP (on the Fedora host) and 'X
>> -broadcast' (on the Mac.) This actually works rather well. One problem,
>> though: Full root window redraws are very slow. This leads to annoying
>> delays on greeter display, login and also when the logout icon is
>> selected (because of the display "gray-out" operation, I guess.)
>>
>> Any advice?
>>
>> BTW, it seems to me that that X is faster than VNC for *most other*
>> operations...
>>
>> - Toralf
> 
> 
> Actually, the problem could be that the connection just isn't fast 
> enough for smooth image data display; I'm using an 11Mb wireless link, 
> which I now think is quite a bit slower in real terms even than 10Mb UTP 
> Ethernet. However, the operation is just as slow with a plain-colour 
> background as it is when using an image. Does this mean that raw pixel 
> data is sent to the display even in the former mode? Why?

I've used X -query to login to several different machines on my 100 mbit 
LAN. There was some slight slowness compared with X on the same box, but 
nothing of concern.

I have used VNC over dialup as recently as today, and I found a 1024x768 
usable. Not great, but usable. "X -query" would not be a goer over a modem.

Note that the usability of VNC or X over a network depends on what one's 
doing. _I_ was mostly typing into xterms and the like, with a bit of 
mozzie mail reading. Playing games or movies would be another thing 
altogether.

I do not think Gnome a relevant part of your problem.



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Cheers
John

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