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X240: was LF EDID Registry entry, FOUND: Intel's own EDID override!!!!

X230 and later series specific matters only
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RealBlackStuff
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X240: was LF EDID Registry entry, FOUND: Intel's own EDID override!!!!

#1 Post by RealBlackStuff » Wed Nov 22, 2017 11:26 am

I'm looking for a specific Registry entry in a W7 installation (not W10).
This entry is only applicable to 12.5" IPS FHD (1920x1080) screens such as used in X240/X250, but also in X220/X230 with nitrocaster's FHD-mod.

Using regedit.exe go to: HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Enum\DISPLAY
Then please check if you have this entry there: LEN40E4.

When found, please rightclick on DISPLAY and then on Export and save it as e.g. display.txt (NOT as a .reg file to avoid complications).
Exit regedit.
Could you then please copy/paste the full content of that file here?
And also tell which X2x0 machine and if your Brightness-control works?
Much obliged!


The above is probably only for Lenovo-supplied screens, such as LP125WF2-SPB2, -SPB3 and -SPB4, that also have a FRU-number.
Other screens (not originally from Lenovo) have DISPLAY entries such as:
LGD0449 (e.g. LP125WF2-SPB3 from win0win)
LGD048A (e.g. LP125WF2-SPB4 from win0win)
Don't need those.

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Re: Wanted: W7 Registry entry for Display 12.5" FHD *LEN40E4*

#2 Post by RealBlackStuff » Wed Nov 22, 2017 1:46 pm

I was actually after the EDID for that screen.
In the meantime I think I got it from W10.

If someone else wants it:

Code: Select all

Key Name:          HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Enum\DISPLAY\LEN40E4\4&1cf99b88&0&UID265988\Device Parameters
Class Name:        <NO CLASS>
Last Write Time:   10/19/2017 - 7:41 AM
Value 0
  Name:            EDID
  Type:            REG_BINARY
  Data:            
00000000   00 ff ff ff ff ff ff 00 - 30 ae e4 40 00 00 00 00  .ÿÿÿÿÿÿ.0®ä@....
00000010   00 17 01 04 95 1c 10 78 - ea b5 45 99 59 57 91 27  .......xêµE.YW.'
00000020   1f 50 54 00 00 00 01 01 - 01 01 01 01 01 01 01 01  .PT.............
00000030   01 01 01 01 01 01 f4 35 - 80 ba 70 38 0f 40 30 20  ......ô5.ºp8.@0 
00000040   35 00 14 9c 10 00 00 1a - f4 35 80 ba 70 38 0f 40  5.......ô5.ºp8.@
00000050   30 20 35 00 14 9c 10 00 - 00 1a 00 00 00 0f 00 d1  0 5............Ñ
00000060   09 3c d1 09 3c 28 0a 00 - 30 e4 00 00 00 00 00 fe  	<Ñ	<(..0ä.....þ
00000070   00 4c 50 31 32 35 57 46 - 32 2d 53 50 42 32 00 bf  .LP125WF2-SPB2.¿
I'll work on the above and try to supply the matching W7-code later.

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Re: Wanted: W7 Registry entry for Display 12.5" FHD *LEN40E4*

#3 Post by RealBlackStuff » Sun Dec 03, 2017 2:33 pm

HELP!!!
I can't get Brightness Control working on an X240 with W7-Pro 64-bit.
OSD Volume up/down is working and showing.
Intel chipset, power management + driver, Hotkey, Intel graphics drivers are all installed.

I have tried every Registry trick in the book (and many that are NOT in any book, such as Run-as-System).
Used EDID-overrides, and what not, nothing works!
(Except under Linux it works!)

The LCD is a new FHD LP125WF2-SPB3, bought from eBayer win0win.

Suggestions, pretty please!

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Re: Wanted: W7 Registry entry for Display 12.5" FHD *LEN40E4*

#4 Post by RealBlackStuff » Sat Dec 30, 2017 6:03 am

Nobody?

agarza
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Re: Wanted: W7 Registry entry for Display 12.5" FHD *LEN40E4*

#5 Post by agarza » Sun Dec 31, 2017 11:01 pm

I think Intel implemented the EDID override on a newer version for the T450 models, some info on this thread:
http://forum.notebookreview.com/threads ... 01/page-22

Not sure if the EDID would make the brightness work.
Current
T440p:
Core i7-4710MQ|16GB RAM|Intel 200GB SSD| 14.1" AUO IPS FHD|Win 7 Pro|T450 Trackpad|Backlit keyboard|2nd Caddy

T460p:
Core i5-6300HQ|16GB RAM|lPNY 256GB SSD| 14.1" Panasonic IPS WQHD|Win 7 Pro
Past: T420 HD+, X61s XGA, T61 14" SXGA+, T42p 14.1 SXGA+, T30, A22e

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Re: Wanted: W7 Registry entry for Display 12.5" FHD *LEN40E4*

#6 Post by RealBlackStuff » Mon Jan 01, 2018 6:20 am

Thanks for the link!
I went a lot deeper and finally stumbled upon this unicorn gem: an Intel® Graphics Test Driver that bypasses EDID!
There are also newer versions, as mentioned in my above link.

To give you an idea (and more links), see this Intel-post
Bryce@Intel wrote:Re: Feature Request - implement EDID override
Bryce@Intel Apr 21, 2017 4:16 PM

Great news! This completes the platform support. These drivers enable the use of 3rd party EDID applications for internal and external panels on Intel platforms.

Products: 4th Generation (Haswell) - OS: Windows* 7, Windows* 8.1

Download Intel® Graphics Driver for Windows 7*/8.1* [15.36]


Products: 4th Generation (Haswell) - OS: Windows® 10

Products: 5th Generation (Broadwell) - OS: Windows* 7, Windows* 8.1, Windows® 10

Download Intel® Graphics Driver for Windows* [15.40]


Products: 6th Generation (Skylake) - OS: Windows* 7, Windows* 8.1, Windows® 10

Products: 7th Generation (Kaby Lake) - OS: Windows® 10

Download Intel® Graphics Driver for Windows* [15.45]
It'll be a few weeks before I get a chance to test this, but it's nice that Intel finally slaps Lenovo/HP/Dell etc. about their ridiculous LCD whitelists!

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Re: Wanted: W7 Registry entry for Display 12.5" FHD *LEN40E4*

#7 Post by dr_st » Mon Jan 01, 2018 6:44 am

RealBlackStuff wrote:
Mon Jan 01, 2018 6:20 am
It'll be a few weeks before I get a chance to test this, but it's nice that Intel finally slaps Lenovo/HP/Dell etc. about their ridiculous LCD whitelists!
The same evil Intel who just last week was spying on us via its evil MINIX in the Manageability Engine! Well, what do you know? :mrgreen:

Do let us know how your investigation turns out. It may become an important milestone for future modders. :thumbs-UP:
Thinkpad 25 (20K7), X1 Carbon (20HQ), Yoga 14 (20FY), T430s (IPS FHD + Classic Keyboard), X220 4291-4BG, X61 7673-V2V
T60 2007-QPG, T42 2373-F7G, X32 (IPS Screen), A31p w/ Ultrabay Numpad, A21m 2628-GXU

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Re: Was LF: EDID Registry entry, FOUND: Intel's own EDID override!!!!

#8 Post by RealBlackStuff » Mon Jan 01, 2018 6:54 am

Will do.

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Re: Was LF: EDID Registry entry, FOUND: Intel's own EDID override!!!!

#9 Post by hhhd1 » Mon Jan 01, 2018 7:22 am

hmm, would this work for you ?

http://www.codeground.net/howto/overrid ... -registry/

this should override edid with the normal driver.
===

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Re: Wanted: W7 Registry entry for Display 12.5" FHD *LEN40E4*

#10 Post by apala4 » Wed Mar 21, 2018 9:51 am

RealBlackStuff wrote:
Sun Dec 03, 2017 2:33 pm
I can't get Brightness Control working on an X240 with W7-Pro 64-bit.
OSD Volume up/down is working and showing.
Oh , I thought there was no such thing as LCDs whitelist for x240, only for x250 and above.
Already ordered x240 + non FRU 13.3 AUO FHD. And now worry a bit about possible Brightness Control issues.

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Re: Was LF: EDID Registry entry, FOUND: Intel's own EDID override!!!!

#11 Post by RealBlackStuff » Wed Mar 21, 2018 10:17 am

Bit late, but the Intel EDID-override did NOT work on my X240 (with X240s motherboard).

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Re: Was LF: EDID Registry entry, FOUND: Intel's own EDID override!!!!

#12 Post by JohnyConqro » Sun Apr 15, 2018 2:02 pm

RealBlackStuff wrote:
Wed Mar 21, 2018 10:17 am
Bit late, but the Intel EDID-override did NOT work on my X240 (with X240s motherboard).
Have you tried to rewrite EDID (http://forum.notebookreview.com/threads ... t-10565766) of the panel with this program edid-rw?

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Re: X240: was LF EDID Registry entry, FOUND: Intel's own EDID override!!!!

#13 Post by RealBlackStuff » Sun Apr 15, 2018 4:21 pm

I have tried every EDID program (Windows or Linux) that I could find.
None of them worked.

Only yesterday did I discover that I may have the wrong LCD-cable 0C46006.
That cable is nowhere listed or described.
So now I have ordered a 00HM134 and hope that will solve my problem.
Will let you know.

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Re: X240: was LF EDID Registry entry, FOUND: Intel's own EDID override!!!!

#14 Post by 217R » Fri May 18, 2018 8:45 pm

There is solution for this problem? Cause many x240 swapped on FHD lcd panel the brightness hotkey (Fn+F5/F6) not working

Thanks before dear.....

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Re: X240: was LF EDID Registry entry, FOUND: Intel's own EDID override!!!!

#15 Post by RealBlackStuff » Sat May 19, 2018 7:59 am

Unfortunately that 00HM134 still did not solve the problem.
But it does work under Linux.
I tried Linux Mint 18 Cinnamon "Sarah, but will try "Sylvia next", should also be OK.

Methinks the time has come to start saying Good Bye to Windows.
I was already planning that anyway...

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