On Saturday 28 March 2009 13:22:13 Matthew Garrett wrote: > On Sat, Mar 28, 2009 at 09:41:12AM +0100, Matthias Welwarsky wrote: > > Looking at the somewhat twisted way the Sony DSDT code handles power > > management for the graphics adapters, I have my doubts that there will be > > a generic way. Of course a framework like for the rf kill switch could be > > useful, but the vendor and model specific code would end up in > > sony-laptop anyway. > > The Dell XPS 13 has an identical _DSM despite having dual nvidia/nvidia > graphics. The _DSM code in the Vaio DSDT is also very stylistically > different to the rest of it, heavily supporting the idea that it's > nvidia-derived code. Since it's not covered by any standard, I guess switching methods will deviate over time as more hybrid graphics laptops are released. It could be interesting to add generic functions to access _DSM methods, which is part of the ACPI spec. But first and foremost I'm interested in how to initialize it the secondary adapter to the point where an X driver would be able to work with it. Obviously _DSM is not enough. What could I try additionally? Oh, and no need to Cc me, I've subscribed to the list meanwhile. regards, matthias -- 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
