Start and shutdown error with manjaro i3

Hi, my laptop shows the following error message when start and shutdown the system: backlight brightness backlight acpi_video0.

How can i solve it ? … the true problem is that the laptop crash when poweor

Thanks … !

If you cannot boot then boot using a LIVE ISO, then manjaro-chroot.

If you still can boot you can skip the above.

Now change the file /etc/default/grub by adding


somewhere in the line


after the first ".

Afterwards apply (still within chroot environment if applicable):

sudo update-grub

exit (twice) and reboot.