> > > > Another lousely related thing: While debugging another issue I've > > > noticed that QXLMonitorsConfig has a surface_id field. What this is > > > intended for? Map non-primary surface to a head? > > > > I just did a brief investigation, I am not sure. It seems the field is > > not used in the QEMU <-> SPICE part of the exchange? > > qemu doesn't touch it. > current linux guest driver never sets this, so it is zero. > > > In the SPICE protocol the field is used to refer to the surface on > > which the monitor is located. I think it can only be a primary surface > > and due to implementation limitations this means only surface ID 0, but > > I may be wrong here. Maybe Frediano has more insight. > > Well, yes, there can be only one primary surface, and the (reserved) > surface ID for it is 0. >
Whomever extended the SPICE protocol (please do not confuse with the implementation) designed it to have multiple primary surfaces. > Question is what is supposed to happed in case the ID of another > (non-primary) surface is placed in that field? > > Tried to do that: > https://git.kraxel.org/cgit/linux/log/?h=drm-qxl-wayland-debug > > Looks like it has not the desired effect in spice client ... > Yes, was never implemented. > > > And one more: I'm trying to get edid support into qemu and linux kms > > > drivers. This might also help identify monitors in the guest (edid data > > > blobs can have serial numbers). Not short-term though as this will need > > > updated guest drivers to work. > > > > We also considered EDID as a possibility for identification, but in the > > end discarded it as not fitting well. The main reason I think was that > > EDID is actually data from the physical monitor, not a graphics device > > output. > > Well, yes, passing through the edid from the physical monitor would not > work very well I guess. I'm looking into purely virtual edid data ... > > cheers, > Gerd > Apparently from Wayland you can't directly read the serial so you'd have to use the physical screen size (which you can read), or change Wayland. Frediano _______________________________________________ Spice-devel mailing list Spice-devel@lists.freedesktop.org https://lists.freedesktop.org/mailman/listinfo/spice-devel
