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Bug 646522 - keyboard backlight dimming doesn't remember previous brightness
keyboard backlight dimming doesn't remember previous brightness
Status: RESOLVED OBSOLETE
Product: gnome-settings-daemon
Classification: Core
Component: power
unspecified
Other Linux
: Normal normal
: ---
Assigned To: gnome-settings-daemon-maint
gnome-settings-daemon-maint
Depends on:
Blocks:
 
 
Reported: 2011-04-02 11:35 UTC by Carl-Anton Ingmarsson
Modified: 2019-03-20 10:53 UTC
See Also:
GNOME target: ---
GNOME version: ---

Attachments
patch that seems to correct the issue for me (1.32 KB, patch)
2011-04-02 11:41 UTC, Carl-Anton Ingmarsson 		none Details | Review

Description Carl-Anton Ingmarsson 2011-04-02 11:35:36 UTC 
I set the backlight to zero using the keys on my keyboard and then wait for the computer to dim. After touching the keyboard to resume from dim the keyboard brightness goes up to 100% instead of the expected value of zero.
Comment 1 Carl-Anton Ingmarsson 2011-04-02 11:41:14 UTC 
Created attachment 184937 [details] [review]
patch that seems to correct the issue for me

The patch above seems to fix the issue for me. I'm not really confident in it though, since I haven't really gotten a grip of how the code works. E.g. why the split between master_percentage and brightness_percent?
Comment 2 Bastien Nocera 2013-10-11 08:01:50 UTC 
Is this still a problem now that gnome-settings-daemon handles keyboard brightness?
Comment 3 Steve Magoun 2014-02-05 19:01:41 UTC 
@Bastien: I can reproduce this behavior on a MacbookPro3,1 running Ubuntu 14.04 with g-s-d 3.8.6.1-0ubuntu3.

To reproduce:
1) Boot the machine + login. Observe that the keyboard backlight is on
2) Press the backlight toggle key. Observe that the keyboard backlight goes off
3) Wait for the screensaver to kick in (the screen dims)
4) When the screen goes completely black, move the mouse cursor or touch the keyboard

Expected results:
The keyboard backlight remains off

Actual results:
The keyboard backlight comes on

This is 100% reproducible for me.

The incorrect behavior seems related specifically to toggling the backlight. If in step 2 you reduce brightness using the brightness down key (instead of using the toggle), the backlight stay off as expected after step 4.
Comment 4 Bastien Nocera 2014-09-03 12:19:16 UTC 
Does this still happen with more recent versions of gnome-settings-dameon?

Don't forget to update the status of the bug, NEEDINFO bugs don't show up in the default queries...
Comment 5 GNOME Infrastructure Team 2019-03-20 10:53:42 UTC 
-- GitLab Migration Automatic Message --

This bug has been migrated to GNOME's GitLab instance and has been closed from further activity.

You can subscribe and participate further through the new bug through this link to our GitLab instance: https://gitlab.gnome.org/GNOME/gnome-settings-daemon/issues/169.