After I resume from suspend, I found the backlight is normal, and here is the log.
** Attachment added: "a285.journal.log" https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1802834/+attachment/5221571/+files/a285.journal.log -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1802834 Title: Dim screen after first boot on Thinkpad A285 To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1802834/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
