apparently fixed by the series ending at https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=181567aa9f0d297804f1ea5d3ff4ba4518e05f2c
included in 5.10-rc1 -- 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/1890772 Title: No signal on 4K 60Hz DisplayPort monitor by default, until "max bpc" is lowered to 8 To manage notifications about this bug go to: https://bugs.launchpad.net/gnome-control-center/+bug/1890772/+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
