On Mi, 2015-07-01 at 13:10 +0200, David Herrmann wrote: > Hi > > On Mon, Jun 29, 2015 at 9:42 AM, Gerd Hoffmann <kra...@redhat.com> wrote: > > Signed-off-by: Gerd Hoffmann <kra...@redhat.com> > > --- > > src/login/71-seat.rules.in | 6 ++++++ > > 1 file changed, 6 insertions(+) > > > > diff --git a/src/login/71-seat.rules.in b/src/login/71-seat.rules.in > > index ab7b66f..270da71 100644 > > --- a/src/login/71-seat.rules.in > > +++ b/src/login/71-seat.rules.in > > @@ -17,6 +17,12 @@ SUBSYSTEM=="usb", ATTR{bDeviceClass}=="09", TAG+="seat" > > # 'Plugable' USB hub, sound, network, graphics adapter > > SUBSYSTEM=="usb", ATTR{idVendor}=="2230", ATTR{idProduct}=="000[13]", > > ENV{ID_AUTOSEAT}="1" > > > > +# qemu (version 2.4+) has a PCI-PCI bridge (-device pci-bridge-seat) > > +# to group devices belonging to one seat. > > +# see http://git.qemu.org/?p=qemu.git;a=blob;f=docs/multiseat.txt > > +SUBSYSTEM=="pci", ATTR{vendor}=="0x1b36", ATTR{device}=="0x000a", \ > > + TAG+="seat", ENV{ID_AUTOSEAT}="1" > > + > > I have no idea why this is correct. Could you provide a proper commit-message? > > Is this specific VID/PID match exclusively used for seat'ing?
Yes. The normal pci-pci bridge ("-device pci-bridge") has 1b36:0001. The new pci-bridge-seat was specifically added to simplify guest-side multiseat configuration. It is identical to the normal pci-pci bridge, except that it has a different id (1b36:000a) so we can match it and configure multiseating automatically. The documentation linked in the comment has all the details. /me through this would be more useful as it is visible on the installed system (unlike the git commit message). But I can cut & paste the paragraph above into the commit message and resend. Or should I redo the github pull-request instead? cheers, Gerd _______________________________________________ systemd-devel mailing list systemd-devel@lists.freedesktop.org http://lists.freedesktop.org/mailman/listinfo/systemd-devel