If you decide to give it a shot, then follow these instructions: Updating to Linux Kernel 4.13-r1 for Linux Mint (or Ubuntu): You may wish to read about the risks involved in updating the kernel before trying this. You may wish to install the newest kernel.but keep in mind, this could cause other issues. The linux 4.4ish may not have proper support for the keyboard. It could very well be a linux kernel issue. Post the output of the following command:
You mentioned in the comments that you tried to echo 1 to one of the devices. Should this method not work, does the keyboard come on at all before the system starts to boot linux? The idea behind this is that perhaps the fnc keys for your keyboard isn't working. If it does not work, then backup and undo all the changes you made to the /etc/default/grub file. Whatever the keyboard backlight buttons are, try them. Reboot.Īfter reboot, try the function keys for your keyboard. Go to the line that says, 'GRUB_CMDLINE_LINUX=quiet splash' and change that line to read 'GRUB_CMDLINE_LINUX= quiet splash acpi_backlight=vendor' then save the file. Sudo gedit /etc/default/grub, then type the password for the administrator. Since the user has supplied the output of the above commands, I'll update this instead of writing a new reply. Grep "GRUB_CMDLINE_LINUX" /etc/default/grubĪlso, what kernel version are you using? Update:
I am only writing this as a reply because I don't have enough rep points to add a simple comment.Ĭould you post the output of the following command when typed into the terminal?
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