[Bug 1340544] Re: gnome-rr: Adjust the minimum brightness level when the maximum >= 100.
Shih-Yuan Lee
1340544 at bugs.launchpad.net
Tue Aug 5 09:06:10 UTC 2014
** Also affects: unity-settings-daemon
Importance: Undecided
Status: New
** Tags added: brightness trusty
** Tags added: broadwell haswell
--
You received this bug notification because you are a member of Ubuntu
Sponsors Team, which is subscribed to the bug report.
https://bugs.launchpad.net/bugs/1340544
Title:
gnome-rr: Adjust the minimum brightness level when the maximum >= 100.
Status in GNOME Desktop Common Files:
New
Status in Unity Settings Daemon:
New
Status in “gnome-desktop3” package in Ubuntu:
New
Bug description:
If the maximum brightness is equal to or bigger than 100, it has higher
possibility that zero is off. So adjusting the minimum brightness to 1
to avoid the problem.
Quotes from
http://cgit.freedesktop.org/xorg/proto/randrproto/tree/randrproto.txt
"This property controls the brightness on laptop panels and equivalent
displays with a backlight controller. The driver specific maximum
value MUST turn the backlight to full brightness, 1 SHOULD turn the
backlight to minimum brightness, 0 SHOULD turn the backlight off."
Quotes from http://msdn.microsoft.com/en-
us/library/windows/hardware/ff569755(v=vs.85).aspx
"Brightness levels are represented as single-byte values in the range
from zero to 100 where zero is off and 100 is the maximum brightness
that a laptop computer supports. Every laptop computer must report a
maximum brightness level of 100; however, a laptop computer is not
required to support a level of zero. The only requirement for values
from zero to 100 is that larger values must represent higher brightness
levels."
To manage notifications about this bug go to:
https://bugs.launchpad.net/gnome-desktop/+bug/1340544/+subscriptions
More information about the Ubuntu-sponsors
mailing list