Bug#487635: Performance degradation over remote ssh X11 forwarded display (and any other remote X connection)

[Seb James <sjames@wmltd.co.uk>]

I've been experiencing this problem in Lenny myself. I use unencrypted,
remote X, using XDMCP to establish a connection. I find particular
problems when using Evolution - it's unusable to scroll the lists. I
also experience slow performance using X tunneled via ssh.

I've applied Stephane Graber's patch for libxcb, which he created for
Ubuntu. See the libxcb patch in:
https://launchpad.net/~stgraber/+archive/ppa

You can find my application of this patch to Lenny (for i386 only right
now) here:

http://www.wmltd.co.uk/debian/libxcb1/

This patch restores the acceptable performance I was experiencing in
Debian Etch (prior to my upgrade to Lenny last week).

I've uploaded all the files I edited there; you can download the .deb
files and install (all of) them. The build tree is there, too. The patch
is only a couple of lines.

Hope it's helpful.

Seb James