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

[Lennart Poettering]

On Mon, 21.01.13 21:56, poma (pomidorabelisima at gmail.com) wrote:

> 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!

garbled output and issues in the kernel logs usually indicate a
kernel/driver problem, not a systemd problem. Have you filed a bug in
rhbz against the kernel? Make sure to CC airlied who write the DRM driver.

Lennart

-- 
Lennart Poettering - Red Hat, Inc.