Thanks for the bug report. This appears to be either a hardware problem or a bug in the Nvidia driver. I think most likely it's due to insufficient HDMI cable bandwidth. Please ensure you are using an HDMI 2.1 certified cable capable of at least 40 Gbit/s. An HDMI 2.0 cable will not be good enough.
** Summary changed: - refresh rate at 4k 144hz cant be set + HDMI refresh rate at 4k 144hz cant be set ** Summary changed: - HDMI refresh rate at 4k 144hz cant be set + HDMI refresh rate at 4K 144Hz can't be set ** Package changed: xorg (Ubuntu) => nvidia-graphics-drivers-515 (Ubuntu) ** Changed in: nvidia-graphics-drivers-515 (Ubuntu) Status: New => Incomplete -- You received this bug notification because you are a member of Ubuntu-X, which is subscribed to xorg in Ubuntu. https://bugs.launchpad.net/bugs/1990170 Title: HDMI refresh rate at 4K 144Hz can't be set To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/nvidia-graphics-drivers-515/+bug/1990170/+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