1) This started when I did a clean install of 18.04. I was running 17.10 on the same hardware with the same kernel parameters (the "acpi_osi=!Windows 2015"). I'm afraid I can't tell you which kernel exactly, but I keep things up to date. I upgraded a few days before this report. I think it was release day actually.
2) This issue appears fixed in mainline. 4.17.0-041700rc6-generic #201805202330 SMP Sun May 20 23:31:40 UTC 2018 x86_64 x86_64 x86_64 GNU/Linux ** Tags added: kernel-fixed-upstream kernel-fixed-upstream-4.17-rc7 ** Changed in: linux (Ubuntu) Status: Incomplete => Confirmed -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1768139 Title: Kernel crash when booting laptop with hdmi monitor connected To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1768139/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs