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List:       freedesktop-xorg
Subject:    Re: Multiple Xservers and VT-Switch
From:       Alexandre CONFIANT-LATOUR <cmwachoukette () gmail ! com>
Date:       2012-06-28 7:56:26
Message-ID: 4FEC0E2A.3040105 () gmail ! com
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On 26/06/2012 23:47, Wolfgang Draxinger wrote:
> On Tue, 26 Jun 2012 13:25:40 +0200
> Alexandre CONFIANT-LATOUR<cmwachoukette@gmail.com>  wrote:
>> I'm working on a small X.org module that will provide remote desktop
>> capabilities to an Xserver but i'm stuck with VT-Switch problems.
>
> Well, personally I'd use Xpra for this. Xpra is a proxy X server, that
> allows to detach and reattch X clients. This would also ease up your
> use case. Use a Xvfb or Xvnc for the remote framebuffer case and attach
> to a regular X server for local login or SSH X forwarding.

Using Xpra with Xvfb/Xvnc is not a solution for me because i'm working 
on an Xvnc alternative (as an Xorg module that can be plugged-in to a 
standard Xorg where Xvnc is a moded server)

>> I think that this problem is caused by VT-Switch that disable inputs
>> and outputs from the first Xserver when starting the second.
>
> Yes. It's not only input processing that goes away, but also the
> screen framebuffer. Without that you have no video you could send out.

Yes that was my problem but i found a way to handle VT-Switches without 
disabling IO and Framebuffer access and without modding the Xserver itself.

The hack was to unregister 'xf86Wakeup' from Wakeup handlers. Register a 
custom function that check the 'xf86info.vtRequestPending' flag, switch 
it to false, call the original 'xf86Wakeup' and handle the vt-switch in 
the way i wanted.

Thank you for your answer.

-- 
Alexandre Confiant-Latour
WWW       : http://user-unfriendly.net
@         : cmwachoukette@gmail.com
Jabber    : choukette@im.apinc.org
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