Fix brightness control for Intel HD Graphics 4000 (at lease samsung XE700T1C)

register.md

Windows

Currently reads as :

[HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\Control\Class{4d36e968-e325-11ce-bfc1-08002be10318}\0000] "FeatureTestControl"= "Edit DWORD 32 bit"= f000

Registry with New Value:

You needed to change the value in registry to:(f008)

[HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\Control\Class{4d36e968-e325-11ce-bfc1-08002be10318}\0000] "FeatureTestControl"="Edit DWORD 32 bit"=f008

Linux

1. You need to kill your display manager, to create new Xorg.conf file (because it runs X server):

• Press Ctrl+Alt+F1 (Dont panic, while your Window system is runing, you can go back with Ctrl+Alt+F7)
• typesudo service lightdm stop and press Enter(e.g. gdm, kdm, xdm)

2. Create new Xorg configuration file

• type X -configure and press Enter
• type mv xorg.conf.new /etc/X11/xorg.conf and press Enter

3. Start X Server (you can do it all without GUI via command line, but I was more comfortable with this aproach):

• typesudo service lightdm start and press Enter(e.g. gdm, kdm, xdm)

4. Modify Xorg.conf file

• navigate to /etc/X11/xorg.conf and open Xorg.conf (in my case latest was xorg.conf.05312015) via leafpad (e.g. gedit, pluma)
• search for Section "Device" and then for Driver (on my PC it said Driver "intel" by default, but it could be something else, so change it to intel)
• add line Option "Backlight" "intel_backlight" after Driver "intel" (it doesn't really matter where, as long as it stays in Device Section)
• save

5. Modify GRUB

• sudo gedit /etc/default/grub (e.g. leafpad, pluma...)
• set to GRUB_CMDLINE_LINUX_DEFAULT="quiet splash acpi_backlight=video" (acpi_osi= did it for me, other options didn't work...)
• in terminal type sudo update-grub and press Enter

6. Restart and profit

Funny thing is, that code is exactly the same as in /usr/share/X11/xorg.conf.d/20-intel.conf, but that way it worked as expected!

Thanks, it worked for me!
HP ENVY 17 3270nr Notebook PC
OS: Zorin OS 16.3 x86_64 (The solution for Windows 11 or 10 also works)
GPU: Intel 3rd Gen Core processor Graphics Controller
GPU: AMD ATI Radeon HD 7850M/8850M

Maybe you know of a similar good Beats Audio solution for this laptop? Because other solutions are either outdated or do not work as they should.
Codec: IDT 92HD91BXX
Codec: Intel PantherPoint HDMI

The problem is that not all speakers work. And when playing sound from the left or right, only the middle works.

@dturovskiy https://chat.openai.com/share/f7c0927e-7405-483c-a2fb-d879831c98e7 😅
that's all i have.

Thank you for that too🙂