on unsuspend g-p-m alters the backlight level even if power status not changed

[Paul Sladen]

If the backlight brightness has been altered (for example it's a sunny day) and then the machine is suspended; on unsuspend the backlight brightness will suddenly jump back to the level configured in g-p-preferences after a couple of seconds, even if the AC power status as not changed.

This looks fairly unslightly and it isn't necessarily want is wanted.

Ideally g-p-manager should only act on its internal settings when a change of state occurs ('edge' rather than 'level').

This also appears to happen when the screensaver deactivates and comes back to the desktop.

[Richard Hughes (richard-hughes)]

How did you modify the brightness of the laptop panel without using g-p-p?

[Paul Sladen (sladen)]

Fn-Home/Fn-End. Aswell as generating nvram events on the ThinkPad these also get handled directly by the hardware.

The long-term solution is to map all the hot-keys through the input layer. Take the key-event, examine the appropriate hardware-state and if nothing has changed then process the action in software. Wifi/BT toggle, VGA/TFT and Volume are other examples of events that may or may not be handled at a lower-level, but which still generate the key-action.

[Paul Sladen (sladen)]

Just noticed that is related:

  https://launchpad.net/bugs/34743

[Richard Hughes (richard-hughes)]

But we can cope with that, as g-p-m could read the brightness and then set it to this value on resume, rather than just enforcing the policy brightness.

>The long-term solution is to map all the hot-keys through the input layer.

Agreed.

Richard.