Ubuntu – Display brightness control not working in 17.10

17.10brightnessdrivers

I just upgraded to ubuntu 17.10 and now display brightness controls are not working, and i am not able to change display brightness at all. But it was working perfectly in 17.04

I also tried this method, but still not working.
When I saw system details, it shows unknown graphics.

Section "Device"
        Identifier  "card0"
        Driver      "intel"
        Option      "Backlight"  "intel_backlight"
        BusID       "PCI:0:2:0"
EndSection

What can I do now?

Best Answer

Open a terminal by pressing Ctrl+Alt+T
Edit the /etc/default/grub file by running:
```
sudo nano /etc/default/grub
```

Change the GRUB_CMDLINE_LINUX_DEFAULT line to:

GRUB_CMDLINE_LINUX_DEFAULT="quiet splash acpi_backlight=vendor acpi_osi=Linux"

Press Ctrl+O to save
Press Ctrl+X to exit
Update GRUB by running:
```
sudo update-grub
```
Reboot

Related Solutions

Enable Extra Visual Effects with Intel Graphics Controller

You should check this link to read up on the error: http://ubuntuforums.org/showpost.php?p=8849106&postcount=11

Solution (provided in above link):

    sudo apt-get purge nvidia*
    sudo apt-get install --reinstall xserver-xorg-video-intel libgl1-mesa-glx libgl1-mesa-dri xserver-xorg-core
    sudo dpkg-reconfigure xserver-xorg

Ubuntu – Brightness and actual backlight mismatch after reboot

The solution is updating grub such this:

Open a terminal (Ctrl+Alt+T) and enter:

sudo gedit /etc/default/grub

Then find the line GRUB_CMDLINE_LINUX_DEFAULT="quite splash" and add "acpi_osi=Linux acpi_backlight=vendor" like this:

GRUB_CMDLINE_LINUX_DEFAULT="quiet splash acpi_osi=Linux acpi_backlight=vendor"

Save and exit the file, and run:

sudo update-grub

Now the brightness level stays equal to the actual backlight level after reboot, and brightness hotkeys remain working. All other hotkeys which were working before grub changed are working now, but the hotkey for enabling/disabling touchpad.

Best Answer

Related Solutions

Enable Extra Visual Effects with Intel Graphics Controller

Ubuntu – Brightness and actual backlight mismatch after reboot

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