** Description changed:

- According to RandR X protocol version 1.4.0, the minimum brightness can't be 
0.
- 0 is used to turn off the backlight. The minimum brightness can only be 1.
+ Adjust the minimum brightness level when the maximum >= 100.
  
+ 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."

-- 
You received this bug notification because you are a member of Ubuntu
Bugs, which is subscribed to Ubuntu.
https://bugs.launchpad.net/bugs/1340544

Title:
  gnome-rr: The minimum brightness can not be 0.

To manage notifications about this bug go to:
https://bugs.launchpad.net/gnome-desktop/+bug/1340544/+subscriptions

-- 
ubuntu-bugs mailing list
ubuntu-bugs@lists.ubuntu.com
https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs

Reply via email to