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bbfa235
(Get the code!)
I'm writing to support the original complaint and Alex's post at the top of this ticket.
Please! It's really important to be able to dim the screen automatically when switching to battery power, in order to save battery life. I relied on this in Gutsy. I go back and forth between AC and battery several times a day, and I obviously don't want to have to fiddle with the brightness keys or applet every time I hit the power cord.
(There may be several settings that can extend battery life -- screen brightness, CPU speed, hard disk spindown period, etc. I am surprised that gnome-power-manager doesn't allow all of these to be set differentially for AC and battery. Windows has allowed this for years, at least on Thinkpads.)
Chris, you write: "Personally I do not care if I am on AC or battery, I will adjust the brightness to the level I want and expect it to stay there." But I don't think users like you will be significantly inconvenienced by Alex's suggestion (whereas it would greatly help users like me). Here's why:
- Do you mean that you want to be permanently at 70%? And when you first set up the laptop on AC and set the brightness to 70%, it might change when you unplug it? That's not so horrible. You'll be slightly annoyed that you have to correct the brightness a second time now that you're on battery. But then you will live happily ever after, since you will have identical preferences set for AC and battery. Having to adjust the brightness twice seems a small price to pay for giving the rest of us the flexibility to have two different settings.
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- Or do you mean that you adjust your brightness to local lighting conditions every time you move the machine? In that case, I don't see why you would expect your adjustment to "stay there" when you plug or unplug the machine. Plugging or unplugging probably means you're moving to a new location, so why would you care if your previous adjustment sticks? You're about to readjust anyway.
Chris, you also write that Alex's use case is confusing. That's because Alex was outlining an interesting reversed situation where one might want a *brighter* screen on battery power. That is the reverse of the much more common situation where one wants to *dim* the screen on battery power to save battery. Think about this common situation.