> > : I have the ACPI spec and I'm starting to get to grips with it. Initially, > > : I will be trying to use the static device configuration tables but power > > : management, docking and all that other good stuff should come eventually. > > > > One problem that I've had in trying to use the acpi spec to implement > > something is that the acpi tables on my laptop get overwritten early > > in the boot process on my Vaio. The driver would have to copy the > > tables. > > > > By "early" I mean before the login prompt. > > I had a problem with that. I had to tweak machdep.c to believe the bios > version of extmem so that the ACPI area wasn't overwritten.
Ahh, this is a very common problem on many new laptops. Most notably, the entire IBM ThinkPad line has this problem. Someone submitted a patch that checked to see if the BIOS returned a value > 64M, and if so to 'accept' it's value for the memory, since it's more likely to be correct. I'd like to apply it to -current, but I'm not sure of the political ramifications.... Nate To Unsubscribe: send mail to majord...@freebsd.org with "unsubscribe freebsd-current" in the body of the message
