| 2013-08-06 21:40:18 |
Richard Hansen |
bug |
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added bug |
| 2013-08-06 21:40:55 |
Richard Hansen |
branch linked |
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lp:~albertsmuktupavels/xorg-server/fix-no-devices-detected-for-seats-other-than-seat0 |
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| 2013-08-06 21:41:29 |
Richard Hansen |
bug |
|
|
added subscriber Alberts Muktupāvels |
| 2013-08-06 21:42:02 |
Richard Hansen |
bug watch added |
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https://bugs.freedesktop.org/show_bug.cgi?id=66851 |
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| 2013-08-06 21:42:02 |
Richard Hansen |
bug task added |
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xorg-server |
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| 2013-08-06 21:42:49 |
Richard Hansen |
bug task added |
|
fedora |
|
| 2013-08-06 21:43:26 |
Richard Hansen |
bug watch added |
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https://bugzilla.redhat.com/show_bug.cgi?id=962907 |
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| 2013-08-06 21:43:26 |
Richard Hansen |
fedora: remote watch |
freedesktop.org Bugzilla #66851 |
Red Hat Bugzilla #962907 |
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| 2013-08-06 21:44:28 |
Richard Hansen |
tags |
|
multiseat |
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| 2013-08-06 21:44:43 |
Richard Hansen |
tags |
multiseat |
multiseat saucy |
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| 2013-08-06 21:50:33 |
Launchpad Janitor |
xorg-server (Ubuntu): status |
New |
Confirmed |
|
| 2013-08-06 23:49:36 |
Bug Watch Updater |
xorg-server: status |
Unknown |
Confirmed |
|
| 2013-08-06 23:49:36 |
Bug Watch Updater |
xorg-server: importance |
Unknown |
Medium |
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| 2013-08-07 12:07:37 |
Laércio de Sousa |
bug |
|
|
added subscriber Laércio de Sousa |
| 2013-08-07 21:16:23 |
Richard Hansen |
bug |
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added subscriber Ubuntu Multiseat |
| 2013-08-08 14:44:10 |
Alberts Muktupāvels |
branch linked |
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lp:~albertsmuktupavels/xorg-server/fix-no-devices-detected-for-seats-other-than-seat0 |
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| 2013-08-08 20:56:32 |
Richard Hansen |
removed subscriber a7x |
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|
| 2014-05-16 07:41:57 |
Bug Watch Updater |
xorg-server: status |
Confirmed |
Fix Released |
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| 2014-07-01 14:17:22 |
Alberts Muktupāvels |
branch linked |
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lp:~albertsmuktupavels/xorg-server/lp-1209008 |
|
| 2014-07-03 09:28:03 |
Launchpad Janitor |
xorg-server (Ubuntu): status |
Confirmed |
Fix Released |
|
| 2014-09-30 10:53:15 |
Maarten Lankhorst |
nominated for series |
|
Ubuntu Trusty |
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| 2014-09-30 10:53:15 |
Maarten Lankhorst |
bug task added |
|
xorg-server (Ubuntu Trusty) |
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| 2014-09-30 10:53:29 |
Maarten Lankhorst |
xorg-server (Ubuntu Trusty): status |
New |
In Progress |
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| 2014-09-30 10:53:42 |
Maarten Lankhorst |
xorg-server (Ubuntu Trusty): assignee |
|
Laércio de Sousa (lbssousa) |
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| 2014-09-30 11:04:26 |
Alberts Muktupāvels |
removed subscriber Alberts Muktupāvels |
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| 2014-09-30 20:53:39 |
Leonid Evdokimov |
bug |
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added subscriber Leonid Evdokimov |
| 2014-10-01 13:18:39 |
Laércio de Sousa |
branch linked |
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lp:~ubuntu-multiseat/xorg-server/trusty-matchseat |
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| 2014-10-01 14:23:36 |
Laércio de Sousa |
description |
From <https://bugs.freedesktop.org/show_bug.cgi?id=66851>:
> I have a multiseat setup with a primary on-board Intel graphics
> device and a secondary Silicon Motion SM501 graphics card. My SM501
> is configured via custom xorg.conf with siliconmotion ddx driver, so
> it exposes no framebuffer devices to e.g. systemd-logind. The same
> situation is seen e.g. for a NVIDIA graphics card with proprietary
> drivers.
>
> Every time I configure my system to assign my SM501 card with a
> secondary seat, i.e. not seat0, my X server fails to start,
> returning a "No devices detected" error. Nevertheless, when I assign
> my SM501 card with seat0 and attach my Intel graphics device to
> secondary seat (via loginctl), both seats load successfully.
>
> Investigating the Xorg-server sources, I've found something related
> to "platform bus". I don't know what is it at all, but whatever it
> means, my Intel graphics card with its open-source drivers implement
> it, but my siliconmotion driver doesn't.
>
> In its current form, Xorg-server probes for platform bus devices as
> well as "legacy" PCI bus ones only for seat0. For other seats, it
> only probes for platform bus devices, hence it never reaches my
> SM501 card, returning that "No devices found" error.
>
> I don't know if there's a good reason for probing only platform bus
> devices on non-seat0 seats, but this brings a problem for multiseat
> setups like mine.
This same problem was encoutered by a user with two NVIDIA cards; see bug #976124.
A patch was supplied to the upstream bug report, and this patch seems to fix the problem.
Note that this bug only affects detection of cards when X is passed the '-seat' argument with a seat name OTHER than "seat0". Thus, this only happens in multiseat setups. |
[Impact]
* In Xorg-server versions older than 1.16, if Xorg is started as a non-seat0 X server (i.e. if it was started with "-seat XXXX" option where "XXXX" != "seat0"), it only probes platform bus for graphics devices, leaving devices with non-KMS drivers (like NVIDIA proprietary drivers and old ones like xf86-video-siliconmotion) unreachable.
Patch "xfree86_allow_fallback_to_pci_bus_probe_for_non_seat0.patch" from lp:~ubuntu-multiseat/xorg-server/trusty-matchseat fixes this.
* systemd-logind has no intrinsic mechanism to assign non-KMS graphics devices to seats. In this case, one should tag another seat device (keyboard, USB hub, etc.) in udev as "master-of-seat", and provide a suitable xorg.conf for that seat. In order to avoid that a given xorg.conf affects other seats, it should be passed to Xorg via "-config xorg.conf.custom" option, which requires X server command line customization support in DM in use (GDM, for example, has no such support).
Patch "xfree86_add_matchseat_key_to_xorg_conf.patch" from lp:~ubuntu-multiseat/xorg-server/trusty-matchseat introduces a new MatchSeat key for xorg.conf sections "Device", "Screen", and "ServerLayout", which will target a given seat only. Example file /etc/X11/xorg.conf.d/90-seat-1.conf:
Section "Device"
Identifier "card0"
Driver "nvidia"
Option "NoLogo" "True"
# This section will only apply for seat-1
MatchSeat "seat-1"
EndSection
* systemd-logind can't handle any VT switching for non-seat0 seats, but Xorg-server older than 1.16 still opens VT even if it's started as a non-seat0 X server. This may lead to a race condition between X servers: if a non-seat0 one is started before a seat0 one, the former "steals" VTs from the later. If a seat0 X server can't open VTs, systemd-logind can't activate sessions for seat0, leaving user without sound or usb input support, for example.
Patch "xfree86_keep_non_seat0_from_touching_vts.patch" from lp:~ubuntu-multiseat/xorg-server/trusty-matchseat fixes this.
[Test Case]
* Set up a multiseat system where your non-seat0 seats use non-KMS video drivers (you may need to tag another device in udev as "master-of-seat" in order to achieve it).
* When LightDM/GDM tries to start a Xorg server for your non-seat0 seats, it will end up with the following error: "(EE) No devices found".
* After applying xfree86_allow_fallback_to_pci_bus_probe_for_non_seat0.patch, you can configure your seats in LightDM by setting appropriate "xserver-config" properties for each seat. However, you can't configure them in GDM.
* After applying xfree86_add_matchseat_key_to_xorg_conf.patch, configure your seats properly and restart LightDM/GDM services (or reboot your computer) repeatedly. In some iterations, it may happen that logind can't activate graphical sessions for seat0. If it occurs, check output of command "ps -FC Xorg" and you'll see that a non-seat0 Xorg server has a lower PID than seat0 one. Moreover, the non-seat0 has opened a TTY, while the seat0 hasn't.
[Regression Potential]
* Very low. All these patches were well tested in xorg-server "trusty" package available in ppa:ubuntu-multiseat/ppa. |
|
| 2014-10-01 14:24:49 |
Laércio de Sousa |
summary |
X fails to detect certain video cards on non-seat0 seats |
[SRU] X doesn't work for video cards with non-KMS drivers on non-seat0 seats |
|
| 2014-11-05 01:59:37 |
Mathew Hodson |
affects |
fedora |
hwe-next |
|
| 2014-11-05 01:59:37 |
Mathew Hodson |
hwe-next: importance |
Unknown |
Undecided |
|
| 2014-11-05 01:59:37 |
Mathew Hodson |
hwe-next: status |
Unknown |
New |
|
| 2014-11-05 01:59:37 |
Mathew Hodson |
hwe-next: remote watch |
Red Hat Bugzilla #962907 |
|
|
| 2014-11-05 13:12:35 |
Maarten Lankhorst |
tags |
multiseat saucy |
multiseat saucy verification-needed |
|
| 2014-11-09 18:46:10 |
Mathew Hodson |
xorg-server (Ubuntu Trusty): status |
In Progress |
Fix Committed |
|
| 2014-11-09 18:47:27 |
Mathew Hodson |
bug watch removed |
https://bugzilla.redhat.com/show_bug.cgi?id=962907 |
|
|
| 2014-12-01 20:04:49 |
Mathew Hodson |
branch linked |
|
lp:~ubuntu-multiseat/ubuntu/saucy/xorg-server/bug1209008 |
|
| 2014-12-01 20:05:21 |
Mathew Hodson |
branch linked |
|
lp:~ubuntu-multiseat/ubuntu/raring/xorg-server/bug1209008 |
|
| 2014-12-08 16:30:25 |
Mathew Hodson |
bug |
|
|
added subscriber Canonical Hardware Enablement Team |
| 2014-12-08 16:31:18 |
Mathew Hodson |
bug |
|
|
added subscriber SRU Verification |
| 2014-12-08 16:31:29 |
Mathew Hodson |
bug |
|
|
added subscriber Ubuntu Stable Release Updates Team |
| 2014-12-09 21:48:47 |
Mathew Hodson |
xorg-server (Ubuntu Trusty): status |
Fix Committed |
In Progress |
|
| 2014-12-09 22:02:50 |
Mathew Hodson |
tags |
multiseat saucy verification-needed |
multiseat trusty |
|
| 2014-12-09 23:45:51 |
Robert Hooker |
bug task deleted |
hwe-next |
|
|
| 2014-12-09 23:45:56 |
Robert Hooker |
removed subscriber Canonical Hardware Enablement Team |
|
|
|
| 2014-12-10 18:10:01 |
Brian Murray |
xorg-server (Ubuntu Trusty): status |
In Progress |
Fix Committed |
|
| 2014-12-10 18:10:09 |
Brian Murray |
tags |
multiseat trusty |
multiseat trusty verification-needed |
|
| 2014-12-13 21:12:40 |
Andrzej Pietrasiewicz |
tags |
multiseat trusty verification-needed |
multiseat trusty verification-failed verification-needed |
|
| 2014-12-15 11:39:29 |
Laércio de Sousa |
tags |
multiseat trusty verification-failed verification-needed |
multiseat trusty verification-done |
|
| 2014-12-18 16:54:40 |
Launchpad Janitor |
xorg-server (Ubuntu Trusty): status |
Fix Committed |
Fix Released |
|
| 2014-12-18 16:54:55 |
Brian Murray |
removed subscriber Ubuntu Stable Release Updates Team |
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| 2021-09-15 16:04:56 |
XxEarthxX |
branch unlinked |
lp:~ubuntu-multiseat/ubuntu/saucy/xorg-server/bug1209008 |
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|
| 2021-09-15 16:05:29 |
XxEarthxX |
branch linked |
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lp:~ubuntu-multiseat/ubuntu/saucy/xorg-server/bug1209008 |
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| 2021-09-15 16:05:50 |
XxEarthxX |
xorg-server (Ubuntu): assignee |
|
XxEarthxX (budwiser) |
|
