With Linux kernel 4.18.0-041800rc1 from http://kernel.ubuntu.com/~kernel-ppa/mainline, graphical login fails.
Following workaround given by Pierre Moreau at https://bugs.freedesktop.org/show_bug.cgi?id=101665 succeeds: Inside the kernel command line, add options 'acpi_osi=! acpi_osi="Windows 2009"'
With Linux kernel 4.18.0-041800rc1 from http:// kernel. ubuntu. com/~kernel- ppa/mainline, graphical login fails.
Following workaround given by Pierre Moreau at https:/ /bugs.freedeskt op.org/ show_bug. cgi?id= 101665 succeeds:
Inside the kernel command line, add options 'acpi_osi=! acpi_osi="Windows 2009"'