But I know that is wishful thinking on my part. The solution that would be highly recommended for me is the one that works in Mint which is that the ambient light sensor is used to tell the back-light what level to be at (known to work on Thinkpad and Dell). It would be great if we can get someone to help us troubleshoot this type of problem.

This looks to have been resolved in UPower (but I don’t think mate uses that) as the fix didn’t work for me. You can disable or lock your fn key om your Lenovo, Dell and HP. I then have to turn it off again with the F10 hot key Method 1: Enable Backlight keyboard of Lenovo Laptop By Shortcut Keys.

Logged into mate desktop and back-light turns on again.

I then have to turn off again with the F10 hot key

Goes into LightDM Greeter and the back-light turns on.

I turn off the back-light with the F10 key (Dell XPS 13) When changing the keyboard, please bring anti-static gloves as far as possible to avoid. To replace the keyboard, please go to bios and disable the built-in battery. Please verify the image matches your original keyboard. Keyboard for Lenovo ThinkPad T590 Tips: 1.

Boot to grub (backlight comes on) and I unlock my partition for booting into linux. Backlight: Yes or Not Condition: Original, Brand new Warranty: One (1) Year.

I can turn it off each stage and then the next stage it will come back on. Here is how you turn on the back-lit keyboard on your Lenovo laptop.Things I use every day. I have the same problem and it definitely happens when transitioning through the different stages of my booting process or unlocking process.

Turn on keyboard backlight lenovo