Title: Re: Speeding up remote GUI apps - colour depth or
Thanks for everyone's suggestions.
The reason I've come down this route is the VNC viewer or server
would freeze after a few minutes use, so I thought to try run the X11
GUI applications "directly".
By luck I left the viewer open and while moving files from the
Desktop to folders using the command-line and noticed that the
vncviewer updated the screen to indicate that they'd been moved. So, I
concluded that most likely what was happening was that the
viewer/server was giving up on mouse events somehow, rather than
(Any comments on that are welcome.)
I'm trying vncviewer -x11cursor in the hope that this might help
(so far, good). Passing vncviewer 'grabKeyboard: true' also might be
worth a try.
VNC does work well when it does, although the fonts are
I will look into NX or LBX when I have time as I rather like the
idea of running the application "directly" on the Apple
Chris -- I like nEdit too, but I use TextWrangler's (or BBEdit's)
ftp mode which is fine as long as the files aren't huge.
I have generally found two solutions for
1. VNC - Run a vncserver on the host computer that's running the
X11 apps and the viewer on the client system. I do software
development on a Linux server running at work while displaying on my
Mac via X11. In lower bandwidth situations, VNC makes that much
2. LBX - Low Bandwidth X11 - http://tldp.org/HOWTO/LBX.html
Basically the idea behind LBX is that X11 applications send and
receive a large amount of meaningless event information and that
causes issues on low-bandwidth network connections. These events
are sent regardless of color-depth and that is probably why changing
your color depth hasn't made any difference. LBX strips out the
unnecessary events and thus lowers the bandwidth requirements.
Setup for LBX is a bit more difficult than a VNC server, but allows
you to run your X11 applications side-by-side with your regular
In the end, the biggest change I made was going from using NEdit as my
editor to vim. That reduced my bandwidth requirements by a TON.
I've been trying, very unsuccessfully, to speed up access to GUI
over X11 over VPN via the local broadband (which isn't that
My current attempts are based around trying to persuade X to use a
shallower colour depth, figuring that will reduce network traffic
I've tried altering the X11.app colour depth preferences (in
Preferences>Ouput) & restarting X11 to make them active and
using defaults write com.apple.x11 15 (which I presume is
the same thing). Neither seems to make any difference--the apps
open painfully slowly on the local machine regardless of what I do
and always seem to show the full colour depth AFAICT by eye
regardless of the colur depth setting.
I'd welcome any suggestions.
Dunedin, ph. +64 3 478
ZEALAND. fax. +64 3 470 0095
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