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I use Xming connected with ArchLinux/coLinux with TAP (Windows firewall disabled) and some programs start up very slowly - Emacs, for example, taking about 7 seconds to show the window (while emacs -nw starts instantly).
Simpler ones, like xeyes or xterm, start without delay.
No problems with responsiveness after the startup.
Any idea what could be causing this?
Some applications uses a lookup of "hostname" for the Xserver.
Write the ipaddress of windows side of TAP into the file /etc/hosts, for example:
192.168.0.1 windows windows.nodomain
Don't set default route over the TAP device, Typically TAP installations does not have an outgoing way on Windows side. TAP is a separate network, so "gateway 192.168.0.1" in the networks configuration for TAP on Linux side is a typically error.
Thanks for suggestion, but the problem seems to be elsewhere - I have no gateway set, and the Windows side's hostname is in /etc/hosts.
What's strange - when I put my LAN IP in $DISPLAY, so that Linux connects through SLIRP and then (I think) through Windows loopback connection, Emacs starts with a noticeably shorter delay.