[$] ACPI for ARM?
The "Advanced Configuration and Power Interface" (ACPI) was not an obvious
win when support for it was first merged into the mainline kernel. The
standard was new, actual implementations were unreliable, and supporting it
involved bringing a large virtual machine into the kernel. For years,
booting with ACPI disabled was the first response to a wide range of
problems; one can still find web sites advising readers to do that. But,
for the most part, ACPI has settled in as a mandatory part of the PC
platform standard. Now, however, it appears that a similar story may be
about to play out in the ARM world.