Date: Tue, 4 Oct 2011 12:26:27 -0700 From: matt <sendtomatt@gmail.com> To: Benjamin Kaduk <kaduk@MIT.EDU> Cc: yanegomi@gmail.com, freebsd-current@freebsd.org Subject: Re: x220 notes Message-ID: <20111004122627.1f0b199a@sylph> In-Reply-To: <alpine.GSO.1.10.1110040219461.882@multics.mit.edu> References: <20111003204444.329c030e@sylph> <alpine.GSO.1.10.1110040219461.882@multics.mit.edu>
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On Tue, 4 Oct 2011 02:21:59 -0400 (EDT) Benjamin Kaduk <kaduk@MIT.EDU> wrote: > On Mon, 3 Oct 2011, matt wrote: > > > Ultimately, I think if we can set backlight, we can fix the screen > > after resume...I think it's just the backlight is low/off on > > resume... > > Can you use a very strong fronglight to see if this is actually the > case? (Illumination angle may be important as well.) The state of > the liquid crystal polarizing switches should be visible under > sufficient illumination, and whether they change with input would be > pretty definitive. > I actually used to operate my iBook G4 in "frontlight mode" in bright > sunlight for a while (until the wifi card flaked out, tying it to my > desk). > > -Ben Kaduk It's the IPS display, so there's a bit of glare...not much visible. I can't tell for sure... Friend had idea of trying to resume under X with external VGA display...both remained off, however I am using the Intel GPU experimental drivers (To make a note, resume is broken without them as well). I can't get vbetool from ports to do anything with the display other than cause it to turn off. I can type commands just fine under X or console with the display off...so I have tried xset, vbetool. hw.acpi.reset_video causes a majorly bad reboot loop on resume with a flashing thinklight. Matt
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