On Fri, Mar 13, 2009 at 12:36:04PM -0500, Terence Ripperda wrote: > in the case I'm trying to fix here, a vendor is using the NVIF ACPI > extensions, rather than the DGS/DCS methods. not all vendors use these, but for > the ones that do, there's no other way to get the hotkey information. our fix > here is to update the video.c driver to acknowledge the NVIF methods and pass > the methods on to the userspace daemon. I'm not quite clear on what you mean by the hotkey information here. As far as I'm aware, we don't use DCS/DGS support for anything on Linux since it often seems to be either broken or just filled with incorrect information. > currently the nvidia X driver handles the control logic and display change > actions on our boards. this was written a couple of years ago and due to nothing > else in place at the time. we'd prefer to switch to a more generic mechanism in > line with what the community is working on. my understanding is that there is > work on a daemon that relies on X RandR 1.2. I would like nvidia to get involved > in and support that effort. (and I admit nvidia is behind on getting our X RandR > support up to 1.2) > > even once that's done, you'd still need the patch (or a similar patch) I'm > suggesting for this infrastructure to work on NVIF-based platforms. userspace > logic for parsing the NVIF methods would also be needed; I'm working on getting > sign-off to release that IP for general linux support. Yeah, this is the bit I don't understand. The design we've adopted for output switching ignores any BIOS provided information, and instead just enables outputs based on the user preferences. The X driver then has responsibility for performing the actual switch. Nouveau appears to be able to handle this on nvidia platforms without any problem. So, really, I guess I'm not clear on what functionality NVIF is intended to provide here. Is it impossible to enable outputs on some systems without it? -- 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
