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).
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?
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.
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 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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http://forum.notebookreview.com/threads ... 01/page-22
Not sure if the EDID would make the brightness work.
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
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
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!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]
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?
Do let us know how your investigation turns out. It may become an important milestone for future modders.
Collectibles: T430s (IPS FHD + Classic Keyboard), X32 (IPS Screen)
Retired: X61 7673-V2V, T60 1952-F76, A31p w/ Ultrabay Numpad
http://www.codeground.net/howto/overrid ... -registry/
this should override edid with the normal driver.
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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