On Fri, Aug 24, 2007 at 09:48:45AM +0200, Thomas Renninger wrote: > It looks like (as you already mentioned above) BIOS vendors implement > the video ACPI spec extensions and on longterm this code should vanish > from the ThinkPad module again and it should be possible to let > brightness and other video functionality be done by the video module. Given that there are plenty of Thinkpads out there that don't (and will never) usefully implement the ACPI video extension, I don't think there's any realistic chance of that. We're going to be stuck with vendor-specific interfaces for some time. > I could imagine that distinguishing can be done through the OSI/_OS (or > similar, there are two ACPI functions to identify the OS, the old one is > called from OS telling the BIOS which OS is running, the other one is > called from BIOS and OS tells which OS are supported IIRC). Maybe if a > Vista string is in the game, the video extensions are armed... > Maybe there is a specific function the OS must call to make the video > extensions work. I'm not sure there's any especially compelling reason. As long as the platform-specific interfaces still work, there's no reason to prefer the ACPI interfaces. -- Matthew Garrett | mjg59@xxxxxxxxxxxxx - 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
