ubuntu-multiseat team mailing list archive

[Laércio de Sousa <lbsousajr@xxxxxxxxx>]

Good question, Richard!

Let me explain my own example: here in my school, I work with multiseat
computers consisting of a PCI graphics card with Silicon Motion SM501 chip
and a USB hub with embedded audio device for the secondary seat.

Since I'm configuring my SM501 card using xorg-x11-video-siliconmotion
driver, it exposes no framebuffer device or any other kernel device that
could be handled by logind. It's the same scenario one would have with a
NVIDIA graphics card with proprietary drivers --- but, in this case, it's
possible that this particular card exposes some other device logind can
handle. You can run the command "loginctl seat-status <seat>" to get a list
of current devices logind can handle.

Because my card can't be handled by logind at all, I can't tag it as
"master-of-seat", so the best solution in my case is tagging my USB hub as
"master-of-seat", using the following udev rule:

# ThinNetworks Audio Hub
SUBSYSTEM=="usb", ATTR{idVendor}=="05e3", ATTR{idProduct}=="0608",
TAG+="master-of-seat", ENV{ID_AUTOSEAT}="1", ENV{ID_FOR_SEAT}="XXXX"

In this example, a new seat named "seat-XXXX" is automatically created when
I plug the USB hub, in a semi-Plugable fashion.

Now that the seat is created, the last step is assinging my SM501 card to
it. This is done with the following xorg config file, which I put in
/etc/X11/xorg.conf.d folder:

Section "Device"
    BusID "PCI:4:1:0"
    Identifier "videocard_sm501"
    Driver "siliconmotion"
    Option "PanelSize" "1360x768"
    MatchSeat "seat-XXXX"
EndSection
Section "Screen"
    Identifier "screen_sm501"
    Device "videocard_sm501"
    DefaultDepth 16
    MatchSeat "seat-XXXX"
EndSection

CANTATE DOMINO CANTICUM NOVUM
QUIA MIRABILIA FECIT

Laércio


2014-02-17 23:44 GMT-03:00 Richard Hansen <ubuntu-a7x@xxxxxxxxxxxxxxx>:

> On 2014-02-17 13:07, Laércio de Sousa wrote:
> > Never mind.
> >
> > I've just merged my Launchpad and Ubuntu One accounts and now I can edit
> > wiki pages.
>
> Excellent.  Thank you for updating the Packages page.
>
> I have a request:  For the patches that you sent upstream, would you
> mind linking to the mailing list archives from the wiki page?  That will
> allow people to follow the conversation so far (to get an idea about its
> progress).
>
> I saw the new step #5 that you added to the instructions.  I'm curious
> about that step -- I wouldn't have thought that it would be necessary.
> Does it not work for you if you leave out that xorg config snippet?
>
> Also, step #5 says, "You'll also need to tag another suitable device as
> master-of-seat in udev".  By "another" do you mean a device other than
> the video card?  In addition to?  The systemd multiseat page[1] says,
> "This tag is usually set for the framebuffer device of graphics cards."
>  So I would have expected the master-of-seat instructions in step #2 to
> be sufficient.
>
> [1] http://www.freedesktop.org/wiki/Software/systemd/multiseat/
>
> -Richard
>
>
> >
> > CANTATE DOMINO CANTICUM NOVUM
> > QUIA MIRABILIA FECIT
> >
> > Laércio
> >
> >
> > 2014-02-17 14:21 GMT-03:00 Laércio de Sousa <lbsousajr@xxxxxxxxx
> > <mailto:lbsousajr@xxxxxxxxx>>:
> >
> >     Hi there!
> >
> >     I've seen the new wiki page, but I can't edit it (it shows me the
> >     message "imuttable page", even when I'm logged in).
> >
> >     Any idea?
> >
> >     CANTATE DOMINO CANTICUM NOVUM
> >     QUIA MIRABILIA FECIT
> >
> >     Laércio
> >
> >
> >     2014-02-14 18:44 GMT-02:00 Richard Hansen
> >     <ubuntu-a7x@xxxxxxxxxxxxxxx <mailto:ubuntu-a7x@xxxxxxxxxxxxxxx>>:
> >
> >         Hi all,
> >
> >         I created some wiki pages for the ubuntu-multiseat team, and
> >         moved most
> >         of the text in the launchpad.net <http://launchpad.net> pages
> over:
> >
> >         https://wiki.ubuntu.com/MultiseatTeam
> >
> >         Please feel free to edit the pages as you see fit.
> >
> >         Thanks,
> >         Richard
> >
> >         --
> >         Mailing list: https://launchpad.net/~ubuntu-multiseat
> >         Post to     : ubuntu-multiseat@xxxxxxxxxxxxxxxxxxx
> >         <mailto:ubuntu-multiseat@xxxxxxxxxxxxxxxxxxx>
> >         Unsubscribe : https://launchpad.net/~ubuntu-multiseat
> >         More help   : https://help.launchpad.net/ListHelp
> >
> >
> >
>
>
> --
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