[systemd-devel] Someone working on gui for multiseat?

[poma]

On 01/21/2013 03:25 PM, Stef Bon wrote:
> Hi,
> 
> I'm experimenting with the plugable ud-160-A as seat extender. I'm
> borrowing it from Hans de Goede.
> 
> Now it works very good, only with new monitors using the newest EDID
> technique it blocks. Hans has already posted a patch.
> 
> But with an older monitor it works great!!
> 
[…]

This is contradictory to what I have experienced with DisplayLink DL-165
based device[1].
*Without engaging multiseat(udev's rule)* picture is garbled on the
connected monitor, regardless of whether monitor(DVI) comes with the
correct EDID or monitor(VGA)[2] without/broken EDID.
EDID loading by /etc/modprobe.d/drm_kms_helper.conf:
options drm_kms_helper edid_firmware=edid/848-480[2]
doesn't work at all,
and even with working kernel boot parameter:
drm_kms_helper.edid_firmware=DVI-I-1:edid/848-480[2]
system boot stuck few minutes and picture is garbled as before.
[drm] Got external EDID base block and 0 extensions from "edid/848-480"
for connector "DVI-I-1"
[drm] write mode info 153
…
And when connected monitor get activated with e.g.
xfce4-display-settings(picture is still garbled),
then nouveau start spitting messages:
nouveau E[     DRM] fail set_domain
nouveau E[     DRM] validate gart_list
nouveau E[     DRM] validate: -22
nouveau E[     DRM] fail set_domain
…
with slowing down the system.

*With engaging multiseat(udev's rule)*[3] monitor adapter[1] is powered
on, but connected monitor(VGA/DVI) stays powered off(NO SYNC).
If the system ever reaches gdm.
Major Bummer!

Stef, what you talkin bout? :) What/where is Hans's patch?
Is your multiseat setup on Fedora 18 with udl, or Fedora 17 with udlfb?

Cheers,
poma

p.s.
If I have omitted anyone from the list, I apologize in advance :)

[1] http://en.overflye.com/english/list.asp?id=2543
[2] /lib/firmware/edid/848-480
Name: WVGA 848
EISA ID: JCX0701
EDID version: 1.3
EDID extension blocks: 0
Screen size: 15.6 cm x 8.8 cm (7.05 inches, aspect ratio 16/9 = 1.77)
Gamma: 2.2
Analog signal
Max video bandwidth: 40 MHz

	HorizSync 30-32
	VertRefresh 59-61

	# Monitor preferred modeline (60.0 Hz vsync, 31.0 kHz hsync, ratio
1.77, 138 dpi)
	ModeLine "848x480" 33.75 848 864 976 1088 480 486 494 517 +hsync +vsync
EOF
[3]
http://lists.freedesktop.org/archives/systemd-devel/2013-January/008265.html