[Dell Inspiron 5737] brightness could not be controlled by the indicator applet "System settings -> Brightness and Lock"" but sysfs works
Affects | Status | Importance | Assigned to | Milestone | |
---|---|---|---|---|---|
HWE Next |
Fix Released
|
Undecided
|
Unassigned | ||
Trusty |
Fix Released
|
Medium
|
Edward Lin | ||
Utopic |
Invalid
|
Undecided
|
Unassigned | ||
linux (Ubuntu) |
Fix Released
|
Undecided
|
Unassigned | ||
Trusty |
Fix Released
|
Undecided
|
Edward Lin | ||
linux-lts-raring (Ubuntu) |
Invalid
|
Medium
|
Unassigned | ||
Trusty |
Invalid
|
Undecided
|
Unassigned |
Bug Description
Dell Inspiron 5737 (CID 201305-13636) with ubuntu 12.04.3
steps to reproduce the bug:
1. install 12.04.3 on this machine
2. update the system via update manager to make the system up-to-date
3. click the upper-right indicator to launch the "System settings -> Brightness and Lock" applet
4. try to adjust the brightness bar to control the brightness
expected result:
the brightness could be adjusted by the bar
actual result:
screen brightness has no response
-------
ProblemType: Bug
DistroRelease: Ubuntu 12.04
Package: linux-image-
ProcVersionSign
Uname: Linux 3.8.0-33-generic x86_64
AlsaVersion: Advanced Linux Sound Architecture Driver Version k3.8.0-33-generic.
ApportVersion: 2.0.1-0ubuntu17.6
Architecture: amd64
ArecordDevices:
**** List of CAPTURE Hardware Devices ****
card 1: PCH [HDA Intel PCH], device 0: ALC283 Analog [ALC283 Analog]
Subdevices: 1/1
Subdevice #0: subdevice #0
AudioDevicesInUse:
USER PID ACCESS COMMAND
/dev/snd/
/dev/snd/
CRDA: Error: [Errno 2] No such file or directory
Card0.Amixer.info:
Card hw:0 'MID'/'HDA Intel MID at 0x90710000 irq 62'
Mixer name : 'Intel Haswell HDMI'
Components : 'HDA:80862807,
Controls : 21
Simple ctrls : 3
Card1.Amixer.info:
Card hw:1 'PCH'/'HDA Intel PCH at 0x90714000 irq 63'
Mixer name : 'Realtek ALC283'
Components : 'HDA:10ec0283,
Controls : 16
Simple ctrls : 7
Date: Tue Nov 12 05:49:09 2013
HibernationDevice: RESUME=
InstallationMedia: Ubuntu 12.04.3 LTS "Precise Pangolin" - Release amd64 (20130820.1)
MachineType: Dell Inc. Inspiron 5737
MarkForUpload: True
ProcEnviron:
TERM=xterm
PATH=(custom, no user)
LANG=en_US.UTF-8
SHELL=/bin/bash
ProcFB: 0 inteldrmfb
ProcKernelCmdLine: BOOT_IMAGE=
RelatedPackageV
linux-
linux-
linux-firmware 1.79.7
SourcePackage: linux-lts-raring
StagingDrivers: rts5139
UpgradeStatus: No upgrade log present (probably fresh install)
dmi.bios.date: 08/30/2013
dmi.bios.vendor: Dell Inc.
dmi.bios.version: A05
dmi.board.name: 04X8RP
dmi.board.vendor: Dell Inc.
dmi.board.version: X01
dmi.chassis.type: 8
dmi.chassis.vendor: Dell Inc.
dmi.chassis.
dmi.modalias: dmi:bvnDellInc.
dmi.product.name: Inspiron 5737
dmi.product.
dmi.sys.vendor: Dell Inc.
Changed in linux-lts-raring (Ubuntu): | |
importance: | Undecided → Medium |
Changed in linux-lts-raring (Ubuntu Trusty): | |
status: | New → Invalid |
tags: | added: blocks-hwcert-enablement |
Changed in linux (Ubuntu Trusty): | |
assignee: | nobody → Edward Lin (airken) |
Changed in linux (Ubuntu Trusty): | |
status: | Fix Committed → In Progress |
Changed in linux (Ubuntu Trusty): | |
status: | In Progress → Triaged |
tags: |
added: verification-done-trusty removed: verification-needed-trusty |
This command works to change the brightness to be max backlight/ intel_backlight /max_brightness | sudo tee -a /sys/class/ backlight/ intel_backlight /brightnes
cat /sys/class/
or adjust the brightness by a integer, for example, 400 for-example- 400> | sudo tee -a /sys/class/ backlight/ intel_backlight /brightnes
echo <a-integer-