[X2Go-Dev] occurrence of sluggishness in X2Go
John A. Sullivan III
jsullivan at opensourcedevel.com
Fri Jun 1 15:00:15 CEST 2012
On Fri, 2012-06-01 at 08:32 +0200, Mike Gabriel wrote:
> Hi,
>
> just for the record and to let people know about current work focus...
>
> People (esp. John) have reported occurrences of a very sluggish
> behaviour of various applications when run in X2Go sessions.
>
> We developers can now confirm this. Ubuntu users reported this
> earlier, Debian user can now also experience such a sluggishness.
>
> Reproduce on Debian:
>
> * add squeeze-backports archive to your system
> * install iceweasel (esr version)
>
> This will drag in a libcairo from squeeze backports that is very
> probably the cause for making some applications very slow within X2Go
> sessions.
>
> Libcairo is used in all GTK applications and is a layer between GTK
> and the rendering backend (X11, OpenGL, ...). With some recent version
> of libcairo the sluggishness got introduced...
>
> @John: so it is not Nagle, I guess...
>
> Compare: launch gnome-terminal (uses libcairo) on such a system and
> xterm (uses direct X11 rendering). Now create some output on standard
> out and then scroll back the shell history...
>
> Alex has become aware of this on Linux Day Berlin and he has put it on
> his list with high priority to find a solution/workaround for that.
<snip>
Glad we found it and will gladly test as soon as the updates are in
heuler. Thanks - John
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