Can't adjust screen brightness on lenova y410p. I'm running unbutu 13.10. I tried different answers on here but nothing seems to work.
I changed GRUB_CMDLINE_LINUX in /etc/default/grub to include acpi_backlight=vendor
One think different then other people have said is I don't have /sys/class/backlight/intel_backlight
I've tried changing the value ideapad/brightness and thinkpad-screen/brightness