Jet pack installation issue

Hi,
Im having issues while installing nvidia-jetpack, it shows

Temporary failure resolving ‘ports.ubuntu.com
E: Failed to fetch http://ports.ubuntu.com/ubuntu-ports/pool/main/libx/libxmlb/libxmlb2_0.3.6-2build1~20.04.1_arm64.deb Temporary failure resolving ‘ports.ubuntu.com
E: Failed to fetch http://ports.ubuntu.com/ubuntu-ports/pool/main/f/fwupd/libfwupdplugin5_1.7.9-1~20.04.1_arm64.deb Temporary failure resolving ‘ports.ubuntu.com
E: Failed to fetch http://ports.ubuntu.com/ubuntu-ports/pool/main/f/fwupd/fwupd_1.7.9-1~20.04.1_arm64.deb Temporary failure resolving ‘ports.ubuntu.com

That looks like issue on the package server side, please try again and share us the results. Thanks

I think this is due to an unstable internet connection. But I’m also having issue with display port not working.(nothing comes when an HDMI display is connected to it). Only black screen comes.