Public bug reported: I booted from a USB drive made from the Bionic Beta 1 Kubuntu Desktop AMD64 ISO. I have powered off before booting, and also restarted from Kubuntu 17.10. Either way, - the screen starts at normal brightness (about 50%). - The "keyboard" screen appears, again at normal brightness. - A couple of console messages appear, and screen brightness drops to the minimum value. - The Kubuntu "K" splash screen and the Welcome "Try Kubuntu"/"Install Kubuntu" chooser appear, at minimum brightness. - I choose "Try Kubuntu" and the live desktop appears, at minimum brightness. - Strangely, the Kubuntu Desktop's "Battery and Brightness" says that the screen is at 100% brightness. As soon as I move the brightness slider, the screen brightens up to match it.
The laptop is an HP EliteBook 8440p, with Intel graphics. ProblemType: Bug DistroRelease: Ubuntu 18.04 Package: syslinux (not installed) ProcVersionSignature: Ubuntu 4.15.0-10.11-generic 4.15.3 Uname: Linux 4.15.0-10-generic x86_64 ApportVersion: 2.20.8-0ubuntu10 Architecture: amd64 CasperVersion: 1.389 CurrentDesktop: KDE Date: Fri Mar 9 01:13:57 2018 LiveMediaBuild: Kubuntu 18.04 LTS "Bionic Beaver" - Alpha amd64 (20180306.1) ProcEnviron: PATH=(custom, no user) XDG_RUNTIME_DIR=<set> LANG=en_US.UTF-8 SHELL=/bin/bash SourcePackage: syslinux UpgradeStatus: No upgrade log present (probably fresh install) ** Affects: syslinux (Ubuntu) Importance: Undecided Status: New ** Tags: amd64 apport-bug bionic -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1754536 Title: Kubuntu bionic beta 1: laptop screen set to minimum brightness To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/syslinux/+bug/1754536/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs