Hi Laurent, is it possible to get the i915_opregion from your debugfs? probably under /sys/kernel/debug/dri/0/i915_opregion Thanks, Rodrigo. On Wed, Aug 28, 2013 at 3:23 PM, Jani Nikula <jani.nikula@xxxxxxxxx> wrote: > 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 -- Rodrigo Vivi Blog: http://blog.vivi.eng.br _______________________________________________ Intel-gfx mailing list Intel-gfx@xxxxxxxxxxxxxxxxxxxxx http://lists.freedesktop.org/mailman/listinfo/intel-gfx
