Your kernel log only mentions some pcieport errors (related to the wifi card?). Is there any way you could try disabling wifi?
Or alternatively, please install Ubuntu version 18.04. ** Package changed: xorg (Ubuntu) => ubuntu ** Tags added: radeon ** Changed in: 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/1788990 Title: ubuntu on starting keeps lagging To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+bug/1788990/+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