Is there anything missing when forwarding my X11 connections?

[Carsten Haitzler]

On Mon, 10 Feb 2025 09:02:40 +0100 Christophe Lohr
<christophe.lohr at cegetel.net> said:

> Le 09/02/2025 à 20:26, Carsten Haitzler a écrit :
> > using mit-shm is entirely a choice by the x client itself. invariably the
> > right thing to do is try use the mit-shm extension - set up a xshmimage
> > ansds then try xshmattach and see if you get an error.
> If I guess correctly what's happening with my test: X clients never get 
> this error, and so they wait. Is that it?

they should...

strace would be the next port of call - but i shall assume they are sitting in
select/epoll waiting on something.

find the simplest app you can that doesn't work and i guess it's time to dig.

in fact trying your socat thing here.. a lot of things work. libreoffice works.
gedit works. my stuff (that does ximage fallback) works. anything qt does
not... in fact... i think i spotted the problem. simplest thing that doesn't
work:

glxgears

i have not dug much, but it seems qt is trying to use gl ... and thus anything
using qt is not working. gl is hanging.

so there's your core problem... without digging more i can't be sure but
getting gl to work remotely these days is not a great idea :)

nothing to do with shm. it's opengl. :)

> >   if you do - it's not going to work
> > (not local) so... fall back to ximages (not xshmimages). if the apps are not
> > doing this... that's their problem. they are obviously then clients that
> > will never be cappable of running remotely.


-- 
------------- Codito, ergo sum - "I code, therefore I am" --------------
Carsten Haitzler - raster at rasterman.com