On Fri, 2014-05-09 at 12:00 -0400, Konrad Rzeszutek Wilk wrote: > So we could just then gat the _EJ0 functionality based on values that > are present (or not) in the SSDT ?
AIUI the very presence of _EJ0 is what marks the device as being ejectable (e.g. in the Windows device manager). It would be possible to make _EJ0 conditionally turn itself into a NOP without resorting to an SSDT, but I don't think that solves the issue they are trying to solve, which is that the user can even try to eject an non-hotplug device. (grep for UAR1 in our dsdt.asl and acpi_info->com1_present in hvmloader/acpi/build.c for an example of this sort of conditional thing) Ian.
