I have a problem with my 530U4E/540U4E Samsung Ultrabook Backlight settings; the system doesn't seem detect the change in brightness settings. To fix it I tried the "Intel backlight Fix" because my hardware is mainly Intel based.

Heres a list of my ultrabook's hardware Specifications followed by how I tried to implement the following fix.

System Manufacturer SAMSUNG ELECTRONICS CO., LTD.
System Model 530U4E/540U4E
System Type x64-based PC
System SKU SAMSUNG SENS Series
Processor Intel(R) Core(TM) i5-3337U CPU @ 1.80GHz, 1801 Mhz, 2 Core(s), 4 Logical Processor(s)
BIOS Version/Date American Megatrends Inc. P08ACM.065.140226.dg, 2/26/2014
SMBIOS Version 2.7
Embedded Controller Version 255.255
BIOS Mode UEFI
BaseBoard Manufacturer SAMSUNG ELECTRONICS CO., LTD.
BaseBoard Model Not Available
BaseBoard Name Base Board
Platform Role Mobile
Secure Boot State On
PCR7 Configuration Binding Not Possible
Windows Directory C:\WINDOWS
System Directory C:\WINDOWS\system32
Boot Device \Device\HarddiskVolume2
Locale United States
Hardware Abstraction Layer Version = "10.0.10240.16392"
User Name user-pc\user
Time Zone New Zealand Standard Time
Installed Physical Memory (RAM) 4.00 GB
Total Physical Memory 3.88 GB
Available Physical Memory 2.04 GB
Total Virtual Memory 4.57 GB
Available Virtual Memory 2.71 GB
Page File Space 704 MB
Page File C:\pagefile.sys
Hyper-V - VM Monitor Mode Extensions Yes
Hyper-V - Second Level Address Translation Extensions Yes
Hyper-V - Virtualization Enabled in Firmware Yes
Hyper-V - Data Execution Protection Yes
Name Intel(R) HD Graphics 4000
PNP Device ID PCI\VEN_8086&DEV_0166&SUBSYS_C0E8144D&REV_09\3&11583659&0&10
Adapter Type Intel(R) HD Graphics Family, Intel Corporation compatible
Adapter Description Intel(R) HD Graphics 4000
Adapter RAM (2,142,291,968) bytes
Installed Drivers igdumdim64.dll,igd10iumd64.dll,igd10iumd64.dll,igdumdim32,igd10iumd32,igd10iumd32
Driver Version 10.18.10.4276 (windows 10)
INF File oem159.inf (iIVBM_w10 section)
Color Planes Not Available
Color Table Entries 4294967296
Resolution 1366 x 768 x 60 hertz
Bits/Pixel 32
Memory Address 0xF7800000-0xF7BFFFFF
Memory Address 0xE0000000-0xEFFFFFFF 

My first attempt I used the sudo command like in this article. I was told that using sudo could be bad so I tried what @zanna recommended to use sudo -i instead, but still doesn't work, maybe I did it wrong?

I tried it through nano and a No metadata error message came up but nothing changed. Is there anything else I can try?

If you know one id be happy to give it a shot, thank you in advance.

I Apologize in advance as I'm still learning to use the terminal, I'm a quick learner so no worries!

Edit: Just checked to see if I needed a specific from Intel if they had one and I found this (for linux specific Drivers) though Ubuntu comes with this by default so it might not be the driver like some post suggest?

Update: Just tried another fix in this link This one doesn't work either, same metadata error appeared, like in the first one. I'll see if I can find more I can try and I'll post an update if I find something.

damien@damien-530U4E-540U4E:~$ sudo gedit /usr/share/X11/xorg.conf.d/80-backlight.conf
[sudo] password for damien:
(gedit:3942): Gtk-WARNING **: Calling Inhibit failed: GDBus.Error:org.freedesktop.DBus.Error.ServiceUnknown: The name org.gnome.SessionManager was not provided by any .service files
** (gedit:3942): WARNING **: Set document metadata failed: Setting attribute metadata::gedit-spell-enabled not supported
** (gedit:3942): WARNING **: Set document metadata failed: Setting attribute metadata::gedit-encoding not supported
** (gedit:3942): WARNING **: Set document metadata failed: Setting attribute metadata::gedit-position not supported

3

2 Answers

I FIXED THE ISSUE!!

I just had a hunch after reading about fixing broken 1080p output and saw a slightly different configuration setting in this article Ubuntu 16.04 Skylake 6th Generation Screen Flickering

It turns out that the original configuration settings on this popular backlight fix were wrong or at least for my setup.

To fix an intel backlight that does not work with the above fix we need to do the same thing again but "change" an option in its setting

First confirm its an intel backlightls /sys/class/backlight/

if it is open sudo gedit /usr/share/X11/xorg.conf.d/20-intel.conf, And if it doesn't exist enter into the terminalsudo touch /usr/share/X11/xorg.conf.d/20-intel.conf, to create it

By default the file would be...Section "Device" Identifier "card0" Driver "intel" Option "Backlight" "intel_backlight" BusID "PCI:0:2:0" EndSection

if you had tried that this is what you need to change Option "Backlight" "intel_backlight", to... Option "AccelMethod" "sna"

Or just backspace everything in the file and copy below into it then click "save"

Section "Device" Identifier "card0" Driver "intel" Option "AccelMethod" "sna" BusID "PCI:0:2:0" EndSection

Once done just reboot and you can now enjoy adjusting the brightness settings! If you found this useful please like my answer and tell others about it who have that intel backlight issue, Thanks!

In my case working solution is Option "Backlight" "acpi_video1"

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