Keyboard backlight issue
I am experiencing issues with keyboard backlight on my laptop Vostro 5468 running Ubuntu 17.04. On battery it works normally (waits 1 minute to turn it off). On AC keyboard backlight turns off automatically after 1 second or less if I didn't touch the touchpad or keyboard. The same issue was on Ubuntu 16.04 and 16.10.
RE: Keyboard backlight issue
Update the BIOS and chipset driver from the Dell Support site.
please click my DELL-username and send me a Private Message with the Dell Service Tag number and your email address, so that we can check on this model.