[Sugar-devel] [FEATURES] Display Device

[Paul Fox]

simon wrote:
 > 
 > I have been checking what gnome is doing (gnome-settings-daemon (the 
 > functionality was in gnome-power-manager before)):
 > 
 > - they use xbacklight [1] if possible to get/set the brightness [2], 
 > doing this through the gnome-desktop library [3]
 > 
 > - there is fallback code to deal with hardware where xbacklight is not 
 > available [4] using the content of "/sys/class/backlight"

if you're planning on using "standard" facilities for backlight
control, that might be another argument for not switching mono/color
when changing brightness.  otherwise either the sugar UI will behave
differently than the brightness keys, or sugar will continue needing
an XO-specific codepath, in which case you might as well just call
olpc-brightness.  (but maybe that's what you were planning on doing
anyway, and are only exploring "standards" for non-XO platforms.)

paul

 > 
 > Regards,
 >     Simon
 > 
 > [1] http://linux.die.net/man/1/xbacklight
 > [2] 
 > http://git.gnome.org/browse/gnome-settings-daemon/tree/plugins/power/gsd-power-m
 > anager.c#n2405
 > [3] 
 > http://git.gnome.org/browse/gnome-desktop/tree/libgnome-desktop/gnome-rr.c#n1682
 > [4] 
 > http://git.gnome.org/browse/gnome-settings-daemon/tree/plugins/power/gsd-backlig
 > ht-helper.c
 > 
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=---------------------
 paul fox, pgf at laptop.org