Ubuntu
linux package

  1. Bug #1214148
  2. Comment #3

Comment 3 for bug 1214148

Revision history for this message
JenniferHodgdon (yahgrp) wrote : Re: Intel video: Display backlight cannot be changed on Toshiba Portege Z935

I am now following the steps on https://wiki.ubuntu.com/Kernel/Debugging/Backlight

The first step was to reboot with default Linux parameters. I had been using "acpi-backlight=vendor". When I took that out and rebooted, the symptoms changed: the hotkeys no longer make the slider on the pop-up brightness widget go up and down. And they still also don't change the screen brightness.

Anyway, I'll be attaching the files requested on that page for debugging.

1. ls /sys/class/backlight > backlight