Could you please try some older kernels (like 4.18) to see if the problem is caused by the new kernel in Ubuntu 19.04?
https://kernel.ubuntu.com/~kernel-ppa/mainline/?C=N;O=D ** Package changed: xorg (Ubuntu) => ubuntu ** Changed in: ubuntu Status: New => Incomplete ** Package changed: ubuntu => linux (Ubuntu) -- 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/1821641 Title: [HP Elitebook 840 G1] Screen is upside down on 19.04 daily To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1821641/+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