Bug#510277: linux-image-2.6.26-1-amd64: Dims screen when power is removed so much that the screen is not usable
tags 510277 moreinfo
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On Wed, Dec 31, 2008 at 01:04:01AM +0000, Sam Morris wrote:
> When I run my Samsung Q45 laptop on battery power, the screen is dimmed to
> save power. This is fine, except that it is dimmed too much--the screen becomes
> so dark that it is basically unusable if there are any external sources of
> light (the sun, or room lighting when it's night time).
The dimming is not done by the kernel itself. Either ACPI or a userspace
tool is responsible, gnome-power-manager for example.
> The dimming happens in a weird way--it seems to redefine the value of 100%
> brightness, as if I run 'xbacklight --get' while the screen is dark, it still
> returns '100'.
I don't know what xbacklight is, but the kernel controls are exported in
the sysfs as /sys/class/backlight. Please check the contents of this.
Bastian
--
"... freedom ... is a worship word..."
"It is our worship word too."
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