When I press brightness contrast button to reduce and increase the brightness in Ubuntu it is neither showing any brightness bar nor having any effect on brightness.
However, when I manually change my brightness, it is working.
When I press brightness contrast button to reduce and increase the brightness in Ubuntu it is neither showing any brightness bar nor having any effect on brightness.
However, when I manually change my brightness, it is working.
The file you should fix is named "grub" at this address: Open Nautilus (Files), go to Computer
/etc/default/grub
to edit this you should have root access or just open terminal and run this
sudo -H gedit /etc/default/grub
Check this out:
# If you change this file, run 'update-grub' afterwards to update
# /boot/grub/grub.cfg.
# For full documentation of the options in this file, see:
# info -f grub -n 'Simple configuration'
GRUB_DEFAULT=0
GRUB_HIDDEN_TIMEOUT=0
GRUB_HIDDEN_TIMEOUT_QUIET=true
GRUB_TIMEOUT=10
GRUB_DISTRIBUTOR=`lsb_release -i -s 2> /dev/null || echo Debian`
GRUB_CMDLINE_LINUX_DEFAULT="quiet splash"
GRUB_CMDLINE_LINUX=""
on the 11th line it says:
GRUB_CMDLINE_LINUX_DEFAULT="quiet splash"
so change it to
GRUB_CMDLINE_LINUX_DEFAULT="quiet splash acpi_backlight=vendor"
and then run this command in terminal
sudo update-grub
then it should be fixed after restarting the system.
Sometimes it doesn't work like this, you may like to test the change like this:
GRUB_CMDLINE_LINUX_DEFAULT="quiet splash"
GRUB_CMDLINE_LINUX="acpi_backlight=vendor"
don't forget to run sudo update-grub
and restart
/etc/default/grub
is the actual location of the file, not Computer/etc/default/grub
.
sudo gedit
then use the "Open" dialog, but just give the absolute path of the file in the command: sudo gedit /etc/default/grub
, as you wrote.
"/home"
as default. so they just need to click on the "computer" on the left side to find "/etc"
at "/"
computer:///
, which has a list of disks, not the FS root.