It looks like an upstream bug: https://gitlab.gnome.org/GNOME/gnome- settings-daemon/-/issues/39. jadahl said it is fixed in GNOME 43.
** Bug watch added: gitlab.gnome.org/GNOME/gnome-settings-daemon/-/issues #39 https://gitlab.gnome.org/GNOME/gnome-settings-daemon/-/issues/39 -- You received this bug notification because you are a member of Ubuntu Studio Bugs, which is subscribed to gnome-color-manager in Ubuntu. Matching subscriptions: Ubuntu Studio Bugs https://bugs.launchpad.net/bugs/1902404 Title: icc profile applies to half of the screen on multi tile 5k MST displays Status in gnome-color-manager package in Ubuntu: Confirmed Bug description: on LG ultrafine 5k and other MST tiled displays, the gnome color manager only applies the icc profile to only one of the two tiles - in my case always on the right half of screen. To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/gnome-color-manager/+bug/1902404/+subscriptions -- Mailing list: https://launchpad.net/~ubuntustudio-bugs Post to : ubuntustudio-bugs@lists.launchpad.net Unsubscribe : https://launchpad.net/~ubuntustudio-bugs More help : https://help.launchpad.net/ListHelp
