GNOME desktop brightness automatically dimmed at startup

[Phill Bailey]

Binary package hint: gnome-power-manager

Please see also http://ubuntuforums.org/showthread.php?p=5716361

Currently there are a number of disgruntled users whose displays are set to be dimmed at boot, including myself, who are seeking a solution to stop this dimming at boot.
Power Management preferences used to have an option to set the brightness at boot, which now seems to have disappeared. I've had a look through gconf-editor and according to the key /apps/gnome-power-manager/backlight/brightness_ac my brightness is set to 100 at startup, however it is still 0% at boot according to the brightness applet.

How do we boot up with 100% brightness?

As you will see from the forum thread, it's a variety of graphics cards and laptops which are affected.
Personally I am using gnome-power-manager 2.22.1-1ubuntu4 on Ubuntu 8.04

Thanks,
Phill Bailey

[apolloFER (apollofer)]

I can confirm it.

When Ubuntu starts up, the backlight is dimmed (battery or no battery, doesn't matter). I have to use the battery applet to put it to normal. It dims back when I start Mplayer or some video player. When I pull the AC plug in (or remove it) nothing happens.

Intel VGA, Lenovo N100, Ubuntu 8.04.

[Yuriy Voziy (yuretsz)]

After upgrainding kernell version to 2.6.27-11 the problem appeared again. Everything was fine with 2.6.27-10

Nvidia driver: 177.82
Lapton: Asus X50N
Ubuntu Interpid Amd64

[Phill Bailey (blackheart-phill)]

I've posted a dirty hack on the ubuntu forums, follow the link above. It requires a little terminal kung-fu, but is completely explained.

The problem, interestingly seems to have been resolved in Intrepid 8.10.

[whtvr (whtvr)]

Hi,

Same thing happens to me. Brightness is down to zero not only at boot but also after screen goes to sleep and it's waken up by pressing a key or after wake up from standby.

I'm on Thinkpad X200s and use 8.10 64bit. I only installed it about three weeks ago and there was no problem with brightness at the beginning and only started happening after I installed updates roughly two weeks ago.

Thanks

[Pedro Villavicencio (pedro)]

Thanks for the report Phill Bailey , It has been a long time without any comment or a duplicate in this bug report and It is possible that the bug has been fixed. May you please try to reproduce it with the latest Stable Release of Ubuntu the Natty Narwhal and add the respective comments to the report? You can learn how to get that release at http://www.ubuntu.com/download . Thanks again and we appreciate your help.

[Phill Bailey (blackheart-phill)]

That was a good few years ago, Pedro! I still have the same laptop though and can happily say that the problem seems to have been resolved in future versions.

[Launchpad Janitor (janitor)]

[Expired for gnome-power-manager (Ubuntu) because there has been no activity for 60 days.]