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la0011

la0011

Member Since 02 Oct 2006
Offline Last Active Jun 24 2016 10:44 AM
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Posts I've Made

In Topic: W520 Black Screen when using MBP8,x SMBIOS

04 April 2016 - 08:53 AM

@lukerus1

 

You didn't get the black screen when using ACPIBacklight.kext? Interesting ...

 

I get that slider as well, probably because I patched PNLF in DSDT. And just like in your case, it doesn't do anything.

 

Remains to be solved I guess.

In Topic: W520 Black Screen when using MBP8,x SMBIOS

31 March 2016 - 04:34 PM

I got what you meant, just in my case it doesn't work properly without NVCAP. Probably due to different cards.

 

Searched for brightness control in El Capitan, but didn't find much.

 

This could be a starting point, maybe it's all about finding a proper DSDT patch ...

 

*********

On a side note, just leaving Inject Intel on in Clover works as well. Then by switching to Optimus in Bios, you get the whole thing working with HD3000. No need to change anything in  Clover.

 

When I don't need the Quadro, this can come in handy.

 

 

Ahhh, sorry for the bad link. Will try to find something else ...

In Topic: W520 Black Screen when using MBP8,x SMBIOS

31 March 2016 - 03:22 PM

That's exactly how I#m doing it now, Nvidia offizcial drivers, no ACPIBacklight.kext

 

Notebook screen and external monitor and the same time only works with this NVCAP value, and without it the scren wouldn't come up immediately, so I'm keeping it ;)

 

Now we need a way to control LCD backlight ... and maybe improved fan control, mine is always on.

In Topic: W520 Black Screen when using MBP8,x SMBIOS

31 March 2016 - 01:32 PM

Success! Thanks a bunch lukerus1!

 

Uninstalled nvdida web drivers, repaired permissions and rebuilt kext cache again, and voila, I got the external screen to work.

 

Reboot with only LCD, after hitting fn-f4, my thinkbook very briefly goes to sleep and wakes up again, with the LCD working.

 

So Intelbacklight must have been the problem. Very interesting.

 

I went back to using my DSDT and reinstalled nvidia web drivers. Behaviour is the same, Official driver seems to work a little better.

 

 

I then had a look at NVCAP, and found this one to work:

 

0501010100000100fc1f0000000001070a000000

 

Immediate picture on LCD, external monitor works plug 'n play.

 

Very cool, can't thank you enough lukerus!

 

I'm testing Rehabman's ACPIBacklight now and will report back.

 

 

UPDATE: ACPIBacklight messes things up again, also gives AppleLPC errors. Strange.

In Topic: W520 Black Screen when using MBP8,x SMBIOS

31 March 2016 - 09:23 AM

Removed IntelBacklight, updated cache, still the same story. I will try with your DSDT again. Who knows ...

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