Hi there! Oleg Samarin, who introduced the "master-of-seat" concept in systemd- logind, has recently submitted a patch for xorg-server that introduces a new capability: MatchSeat. The concept is explained here:
http://lists.x.org/archives/xorg-devel/2013-September/037945.html and the patch is available here: http://lists.x.org/archives/xorg-devel/2013-September/037946.html As you can see, it includes my small patch for fixing that "no devices detected" error. In fact, I've shared privately this patch with him before opening bug freedesktop#66851, and I believe it makes more sense to include my patch in a more comprehensive work like his. I strongly recommend that you try this new patch. I'll finally begin my switch back to Ubuntu tomorrow, so I can upload to Multiseat PPA soon. -- You received this bug notification because you are a member of Desktop Packages, which is subscribed to xorg-server in Ubuntu. https://bugs.launchpad.net/bugs/1209008 Title: X fails to detect certain video cards on non-seat0 seats Status in X.Org X server: Confirmed Status in “xorg-server” package in Ubuntu: Confirmed Status in Fedora: Unknown Bug 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. To manage notifications about this bug go to: https://bugs.launchpad.net/xorg-server/+bug/1209008/+subscriptions -- Mailing list: https://launchpad.net/~desktop-packages Post to : desktop-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~desktop-packages More help : https://help.launchpad.net/ListHelp
