Bug 266005

Summary:	Brightness up key does not work in 4.6
Product:	[Unmaintained] solid	Reporter:	Jonathan Challinger <mr.challinger>
Component:	powermanagement-daemon	Assignee:	Dario Freddi <drf>
Status:	RESOLVED DUPLICATE
Severity:	normal
Priority:	NOR
Version First Reported In:	unspecified
Target Milestone:	---
Platform:	Ubuntu
OS:	Linux
Latest Commit:		Version Fixed/Implemented In:
Sentry Crash Report:

Description Jonathan Challinger 2011-02-10 18:34:46 UTC

Version:           4.6 (using KDE 4.6.0) 
OS:                Linux

My netbook's brightness down key works, brightness up doesn't.
The keys are bound correctly and I can reverse them and I have the same problem, so it's not a key issue.
I can adjust the brightness back up using the slider in the battery applet, so it's not a hardware issue.
I've tried making a new home directory, and it did not solve the problem.

Reproducible: Didn't try




I'm using kubuntu 10.10 with kubuntu-ppa backports for kde 4.6. Problem was not present before the updates.

Comment 1 Jonathan Challinger 2011-02-10 20:09:38 UTC

I now know exactly why this issue exists.
Happens only when there are too few brightness levels available, for example, if your screen has 8 brightness levels (/sys/class/backlight/whatever/max_brightness = 7) as mine did, your brightness up key will not work.

--

For Samsung netbook (NF310) users with samsung-backlight:
Add "options samsung_backlight use_sabi=0 force=1 levels=100" to /etc/modprobe.d/modprobe.conf (create file if necessary)

Comment 2 Christoph Feck 2011-02-10 20:15:08 UTC

This is probably a duplicate of bug 264534.

Comment 3 Jonathan Challinger 2011-02-10 20:19:29 UTC


*** This bug has been marked as a duplicate of bug 264534 ***