Can you try kernel parameter "acpi_osi=Linux-Dell-Video" for that?
That's a workaround that in ACPI uses old _DSM for Linux. -- You received this bug notification because you are a member of Kernel Packages, which is subscribed to linux in Ubuntu. https://bugs.launchpad.net/bugs/1774865 Title: 4.15.0-22 won't boot on Dell XPS 15 9570 Status in linux package in Ubuntu: Invalid Status in linux source package in Bionic: Invalid Bug description: 4.15.0-22 fails on boot on a Dell XPS 9570 with "not all CPUs entered broadcast exception handler". 4.15.0-20 works fine. To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1774865/+subscriptions -- Mailing list: https://launchpad.net/~kernel-packages Post to : kernel-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~kernel-packages More help : https://help.launchpad.net/ListHelp
