Ubuntu
linux package

  1. Bug #1098216
  2. Comment #241

Comment 241 for bug 1098216

Revision history for this message
In , ben (ben-linux-kernel-bugs) wrote :

That means _BCL was never called, so the firmware is handling the brightness changes totally internally, and not reporting the keypress events to acpi video at all. See the message linked in Comment #77, excerpted here:

> When a brightness key is pressed:
> If the key is unmasked:
> Report the key to thinkpad-acpi
> If _BCL has been called:
> Report the key (video event) to acpi video
> Else:
> Adjust the brightness
> Report event 0x6050 to thinkpad-acpi