Date: Mon, 16 Feb 2015 15:45:46 -0800 From: Adrian Chadd <adrian@freebsd.org> To: Ian FREISLICH <ianf@capeaugusta.com> Cc: freebsd-current <freebsd-current@freebsd.org> Subject: Re: r277959 breaks X display on IvyBridge mobile GT2 IG Message-ID: <CAJ-VmonpvgZe5CwX5znfC-8kPzPGaXa7OEYfFvn5pKYg4VON9Q@mail.gmail.com> In-Reply-To: <E1YNUKo-000Hfw-9H@clue.co.za> References: <E1YNUKo-000Hfw-9H@clue.co.za>
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On 16 February 2015 at 14:40, Ian FREISLICH <ianf@capeaugusta.com> wrote: > Ian FREISLICH wrote: >> Adrian Chadd wrote: >> > Hi, >> > >> >> > There's a "invert backlight" option in i915, try setting it to 1? >> >> This is pretty much all I could find (unless I was looking in the >> wrong place). It makes no difference. The backlight appears to >> be disabled. > > Adrian, do you have any idea how to fix the backlight for my laptop? > I ended up reversing out your change r277959 in my local copy to > make the backlight work again here. Hi, I don't, no. I haven't dug further into the i915 backlight control code because, well, a lot of changed in that update. The backlight code was in a lot of flux during the period of time kib chose to fast forward, so it's not unsurprising that it broke for some. I think for now we'll need a quirk that can be added for each laptop we find with that particular behaviour. The real solution is to continue sliding i915 forward in time. -adrian
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