Your XorgLog seems to show that you do have two different GPU drivers both connected to the same physical screen (or two identical screens):
[ 15.105] (II) NOUVEAU(0): EDID (in hex): [ 15.105] (II) NOUVEAU(0): 00ffffffffffff000610a39c00000000 [ 15.105] (II) NOUVEAU(0): 00130103802115780af595a3554f9c26 [ 15.105] (II) NOUVEAU(0): 0f505400000001010101010101010101 [ 15.105] (II) NOUVEAU(0): 010101010101ab22a0a050841a303020 [ 15.105] (II) NOUVEAU(0): 36004bcf100000180000000100061030 [ 15.105] (II) NOUVEAU(0): 00000000000000000a20000000fe004c [ 15.105] (II) NOUVEAU(0): 503135345750342d544c4131000000fe [ 15.105] (II) NOUVEAU(0): 00436f6c6f72204c43440a2020200000 15.464] (II) modeset(G0): EDID (in hex): [ 15.464] (II) modeset(G0): 00ffffffffffff000610a39c00000000 [ 15.464] (II) modeset(G0): 00130103802115780af595a3554f9c26 [ 15.464] (II) modeset(G0): 0f505400000001010101010101010101 [ 15.464] (II) modeset(G0): 010101010101ab22a0a050841a303020 [ 15.464] (II) modeset(G0): 36004bcf100000180000000100061030 [ 15.464] (II) modeset(G0): 00000000000000000a20000000fe004c [ 15.464] (II) modeset(G0): 503135345750342d544c4131000000fe [ 15.464] (II) modeset(G0): 00436f6c6f72204c43440a2020200000 Technically this is correct if the hardware has both GPUs wired to the screen. The system can't know in advance which GPU you would prefer to use unless one has been explicitly disabled already. So I guess it is correct to show the same LCD connection to each GPU. Certainly in software we should be able to detect this and better inform the user that it's only one screen. Ideally that would be via unique serial numbers but Apple has failed to provide a serial number: [ 15.464] (II) modeset(G0): Manufacturer: APP Model: 9ca3 Serial#: 0 As a next option we could guess that most laptops will only ever have one LVDS-connected display, but that's not strictly true for multi- screen laptops. They're rare, but do exist. So I guess the best option we have is to add quirks, which means hardcoding rules for known weird hardware like this. It's possible, but probably not worth doing. So I think the right answer here is to say "Won't fix". The software is indeed correctly showing that you have two different GPUs connected to /a/ screen. ** Changed in: xorg-server (Ubuntu) Importance: Undecided => Low -- You received this bug notification because you are a member of Ubuntu-X, which is subscribed to xorg-server in Ubuntu. https://bugs.launchpad.net/bugs/1809552 Title: Ubuntu sees duplicate display for each graphics card on Macbook Pro To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/xorg-server/+bug/1809552/+subscriptions _______________________________________________ Mailing list: https://launchpad.net/~ubuntu-x-swat Post to : ubuntu-x-swat@lists.launchpad.net Unsubscribe : https://launchpad.net/~ubuntu-x-swat More help : https://help.launchpad.net/ListHelp
