On Wed, 28 Aug 2013, Daniel Vetter <daniel@xxxxxxxx> wrote: > On Wed, Aug 28, 2013 at 7:38 PM, Rodrigo Vivi <rodrigo.vivi@xxxxxxxxx> wrote: >> 01.org forum: https://01.org/linuxgraphics/node/199 >> >> Slot: 00:02.0 >> Class: VGA compatible controller [0300] >> Vendor: Intel Corporation [8086] >> Device: 2nd Generation Core Processor Family Integrated Graphics Controller [0106] >> SVendor: Hewlett-Packard Company [103c] >> SDevice: Device [1854] >> Rev: 09 >> >> Reported-by: Laurent Chardon <laurent.chardon@xxxxxxxxx> >> Cc: Jani Nikula <jani.nikula@xxxxxxxxx> >> Signed-off-by: Rodrigo Vivi <rodrigo.vivi@xxxxxxxxx> > > All the inverted brightness machines we've seen have been gen4 and > Acer/Packard Bell. I suspect there's something amiss in our backlight > handling and at least for current platforms I don't want to merge > quirks before we've reasonably proven that we really need them. Which > means someone should show that Windows has specific code for this HP > laptop first ... Agreed. I'd be wary of adding inverted backlight quirks for anything other than gen4 Acers (or their other brands). > One thing I remember is that there's a linearization table in the vbt > somewhere, maybe that does the trick. Or we simply race our driver > against something in the firmware and inverting the brightness here > cures that. If you get the reporter to dump the i915_opregion file from debugfs, I could check the table. Cheers, Jani. > -Daniel > -- > Daniel Vetter > Software Engineer, Intel Corporation > +41 (0) 79 365 57 48 - http://blog.ffwll.ch _______________________________________________ Intel-gfx mailing list Intel-gfx@xxxxxxxxxxxxxxxxxxxxx http://lists.freedesktop.org/mailman/listinfo/intel-gfx
