You have been subscribed to a public bug: On the page https://wiki.ubuntu.com/HardwareSupport/Machines/Laptops/Dell/XPS/15z the advice is given to add: acpi_backlight=vendor dell_laptop.backlight=0
This resulted (when I check with dmesg) in an error message. I changed it in: acpi_backlight=dell_laptop.backlight=0 now I don't see an error message and lightdm does not crash any longer. The backlight function keys also work perfect. Maybe it has nothing to do with each other, but maybe it does and it can help other Dell XPS15z owners. Kind regards, Dirkdend ** Affects: ubuntu Importance: Undecided Status: New -- Dell XPS15z boot options lightdm crashes https://bugs.launchpad.net/bugs/1132689 You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs