Bug 1378886 - Screen brightness slider not working on Lenovo T460
Summary: Screen brightness slider not working on Lenovo T460
Keywords:
Status: CLOSED WONTFIX
Alias: None
Product: Red Hat Enterprise Linux 6
Classification: Red Hat
Component: xorg-x11-server
Version: 6.8
Hardware: x86_64
OS: Linux
unspecified
medium
Target Milestone: rc
: ---
Assignee: Adam Jackson
QA Contact: Desktop QE
URL:
Whiteboard:
Depends On:
Blocks:
TreeView+ depends on / blocked
 
Reported: 2016-09-23 13:03 UTC by Peter
Modified: 2017-12-06 11:24 UTC (History)
0 users

Fixed In Version:
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Clone Of:
Environment:
Last Closed: 2017-12-06 11:24:16 UTC
Target Upstream Version:


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Description Peter 2016-09-23 13:03:02 UTC
Description of problem:
gnome-power-manager brightness slider does not control screen brightness, on gnome-brightness-applet or power manager.

Version-Release number of selected component (if applicable):
xorg-x11-server-Xorg-1.17.4-9.5.el6_8.x86_64
gnome-power-manager-2.28.3-7.el6_4.1.x86_64

How reproducible:
always


Steps to Reproduce:
1. Adjust brightness slider

Actual results:
Slider moves and xrandr backlight property changes; no other effect seen


Expected results:
Backlight brightness changes


Additional info:
Screen brightness can be adjusted successfully by writing to /sys/class/backlight/intel_backlight/brightness

[intel_backlight]# xrandr --props | grep -i backlight
        BACKLIGHT: 6 
        Backlight: 6 
[intel_backlight]# cat actual_brightness
550

### Move slider - no visible brightness change

[intel_backlight]# xrandr --props | grep -i backlight
        BACKLIGHT: 15 
        Backlight: 15 
[intel_backlight]# cat actual_brightness
550
[intel_backlight]# echo 300 >brightness

### screen brightness changes

[intel_backlight]# xrandr --props | grep -i backlight
        BACKLIGHT: 15 
        Backlight: 15 
[intel_backlight]# cat actual_brightness
300

Comment 4 Jan Kurik 2017-12-06 11:24:16 UTC
Red Hat Enterprise Linux 6 is in the Production 3 Phase. During the Production 3 Phase, Critical impact Security Advisories (RHSAs) and selected Urgent Priority Bug Fix Advisories (RHBAs) may be released as they become available.

The official life cycle policy can be reviewed here:

http://redhat.com/rhel/lifecycle

This issue does not meet the inclusion criteria for the Production 3 Phase and will be marked as CLOSED/WONTFIX. If this remains a critical requirement, please contact Red Hat Customer Support to request a re-evaluation of the issue, citing a clear business justification. Note that a strong business justification will be required for re-evaluation. Red Hat Customer Support can be contacted via the Red Hat Customer Portal at the following URL:

https://access.redhat.com/


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