Public bug reported: This is a case of "Backlight control does not work, and there are no entries in /sys/class/backlight" for what lspci reports as "NVIDIA Corporation GP106M [GeForce GTX 1060 Mobile] (rev a1)" where the kernel parameter acpi_osi= is a workaround. (The workaround is also recorded on Ask Ubuntu at https://askubuntu.com/questions/1030526/brightness-on- laptop-msi-gt72vr-in-ubuntu-18-04-with-nvidia-gtx-1060-mobile- does/1043598#1043598.)
The problem is new for me after upgrade to Bionic, although the cause might be the corresponding update to the NVIDIA drivers. I will add attachments following the instructions at https://wiki.ubuntu.com/Kernel/Debugging/Backlight, though most of them seem to be uninteresting. If I can provide further information, please let me know. ProblemType: Bug DistroRelease: Ubuntu 18.04 Package: linux-image-4.15.0-22-generic 4.15.0-22.24 ProcVersionSignature: Ubuntu 4.15.0-22.24-generic 4.15.17 Uname: Linux 4.15.0-22-generic x86_64 NonfreeKernelModules: nvidia_modeset nvidia ApportVersion: 2.20.9-0ubuntu7.1 Architecture: amd64 CurrentDesktop: ubuntu:GNOME Date: Mon Jun 4 14:20:34 2018 ProcEnviron: TERM=xterm-256color PATH=(custom, no user) XDG_RUNTIME_DIR=<set> LANG=en_US.UTF-8 SHELL=/bin/bash SourcePackage: linux-signed UpgradeStatus: Upgraded to bionic on 2018-06-04 (0 days ago) ** Affects: linux-signed (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/1775065 Title: No brightness controls and /sys/class/backlight empty after upgrade to Bionic on laptop with GeForce GTX 1060 Mobile (kernel parameter acpi_osi= is a workaround) To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux-signed/+bug/1775065/+subscriptions -- ubuntu-bugs mailing list [email protected] https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
