@wxl, I didn't make much progress
Aug 5 2019
Jun 13 2019
Hi @hmollercl, I'll take a look at it.
May 14 2019
If you do decide to do graphics drivers here's the PPA Canonical works on. https://launchpad.net/~graphics-drivers/+archive/ubuntu/ppa
May 13 2019
I think looks-wise the login screen needs a bit of an update(provided screen of 19.04 login screen). Simple changes like centering the user login and making the bar on top a darker color and 2px thinner would make the login screen a bit more complete appearance wise.
Does that mean integrating Raspberry Pi kernel fixes to the Lubuntu Pi images? https://github.com/raspberrypi/linux
There's project called Redshift-Plasmoid which adjusts and configures screen luminosity depending on your surroundings, using Redshift. Though, the project has not been updated in about 2 years. https://github.com/simgunz/redshift-plasmoid