On Friday 19 December 2008 02:23:49 am Len Brown wrote: > ACPI 2.0 defined two new methods in the suspend/resume sequence, > _GTS (Going to Sleep) and _BFS (Back from Sleep) > > They are optional methods, but if the BIOS supplies them, > the OS is supposed to evaluate them immediately before > writing the register to sleep, and immediately after waking up -- > a time when interrupts are disabled. > > ... > Now, several years after ACPI 2.0 was released, > we have yet to observe a single implementation of > _GTS/_BFS in the field -- suggesting that they will > never actually be deployed. There are actually some HP ia64 systems that have _GTS. All the rx7600-, rx8600-, and Superdome-class systems I looked at have it. But in each case, the method is empty, so I don't know why they even bothered to implement it. > So lets keep Linux simple by removing this > theoretical support for _GTS/_BFS, the only > AML methods that mandated being evaluated > with interrupts disabled. Do you want to print a note that _GTS/_BFS exists, but we're ignoring it? If some platform comes along that uses them, a dmesg note might help debug problems. Bjorn -- To unsubscribe from this list: send the line "unsubscribe linux-acpi" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
