Hi, Am Freitag, den 18.08.2017, 10:47 +0300 schrieb Pekka Paalanen: > On Thu, 03 Aug 2017 08:27:06 -0400 > Simon Ser <cont...@emersion.fr> wrote: > > > Hello, > > I'm writing a Wayland client that needs to keep track of screens > > across reboots. I registered a wl_output::geometry event handler. > > This event already has the fields "make" and "model", but is > > missing > > "serial". Is there a way to get an output serial (something like > > "HS3P505873")? Would it be possible to add it to the protocol or is > > it too late? Is there another way to identify screens? > > Hi Simon, > > these are very good questions. I have a vague recollection this has > been discussed before on wayland-devel@, but personally I may have > been > skeptical about the use cases at the time. For reference: https://lists.freedesktop.org/archives/wayland-devel/2017-May/034083.html A lot of points were discussed back then already.
> Anyway, nowadays I think adding the physical monitor serial to > wl_output as a new event should be fine. There are some details to > discuss like if the monitor hardware does not provide a reliable > serial, should the compositor maybe manufacture some GUID or just > leave > the serial unset. What about "monitors" that are not physical > devices, > like a window in another window system - should one relay the serial > from the other window system's monitor, manufacture an artificial > GUID > based on e.g. window system connection, or just not send a serial at > all. You could argue that similar concerns apply to "make" and "model", but they only have a very vague description in the protocol. > Maybe it would be best to just say the serial is from a locally > connected monitor hardware (or equivalent), and leave the cases where > the hardware serial is not available or the output is not a local > physical monitor to not send a serial. Also needs to be discussed whether the values should be compatible accross compositors (e.g. make and model are not currently because of their vague definition). Regards, Philipp _______________________________________________ wayland-devel mailing list wayland-devel@lists.freedesktop.org https://lists.freedesktop.org/mailman/listinfo/wayland-devel
