[systemd-devel] Two questions about logind and seats

[Lennart Poettering]

On Di, 01.08.17 19:32, nerdopolis (bluescreen_avenger at verizon.net) wrote:

> On Tuesday, August 1, 2017 3:00:25 AM EDT Lennart Poettering wrote:
> > On Mo, 31.07.17 21:24, nerdopolis (bluescreen_avenger at verizon.net) wrote:
> > 
> > > > > First, when I attach a 2nd graphics card to seat1, it seems CanMultisession is
> > > > > set to 0. Is there a way to change that? or is that only supported on seat0, 
> > > > > that supports the TTYs?
> > > > 
> > > > Yes, this is only supported where VTs are supported, and that is
> > > > only seat0.
> > >
> > > Thanks, It's currently a kernel limitation I assume? I guess I'll worry about 
> > > multiple sessions on non seat0 seats when it _is_ supported.
> > 
> > Yeah the VCs are drawn by the kernel, hence doing multi-session on
> > other but the first seat would mean either updating the kernel or
> > doing something purely in userspace with a userspace terminal
> > renderer. David Hermann was working on something like this, but he
> > lost interest.
> > 
> > Lennart
> > 
> > 
> Out of curiosity, what would the likes of Weston, X, and other Display Servers
> need on seats outside of seat0? A device to set KD_GRAPHICS on, like a special
> type of pty or something?

Nah. Graphical display managers just need a set of DRM and input
devices to operate on, they require no VTs, ttys, ptys or anything.

Lennart

-- 
Lennart Poettering, Red Hat