** Tags added: bios-outdated-a04
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https://bugs.launchpad.net/bugs/1332379
Title:
[Dell Inspiron 5547/5447] Unable to control brightness with Intel
Haswell GPU
Status in HWE Next Project:
Fix Committed
Status in “linux” package in Ubuntu:
Fix Committed
Status in “linux” source package in Trusty:
Confirmed
Bug description:
CID: 201401-14530 Dell Inspiron 5547
Unable to control the brightness on this system.
Steps:
1. Install 14.04 + update (3.13.0-29), boot to desktop
2. Try to adjust the screen brightness with hotkeys and "Brightness and Lock"
applet
Expected result:
* Screen brightness could be adjusted in both ways.
Actual result:
* Unable to control screen brightness, the brightness indicator would change
according to key press on the hotkeys
Debugging information:
ubuntu@201401-14530:~$ ls /sys/class/backlight
acpi_video0 intel_backlight
ubuntu@201401-14530:~$ grep -r . /proc/acpi
/proc/acpi/button/lid/LID0/state:state: open
/proc/acpi/wakeup:Device S-state Status Sysfs node
/proc/acpi/wakeup:P0P1 S4 *disabled
/proc/acpi/wakeup:LID0 S3 *enabled
/proc/acpi/wakeup:EHC1 S0 *enabled pci:0000:00:1d.0
/proc/acpi/wakeup:XHC S0 *enabled pci:0000:00:14.0
/proc/acpi/wakeup:PXSX S4 *disabled
/proc/acpi/wakeup:RP03 S3 *disabled pci:0000:00:1c.0
/proc/acpi/wakeup:PEG0 S4 *disabled
/proc/acpi/wakeup:PEGP S4 *disabled
/proc/acpi/wakeup:PEG1 S4 *disabled
/proc/acpi/wakeup:PEG2 S4 *disabled
ubuntu@201401-14530:~$ dmesg | grep 'ACPI: Video'
[ 13.689138] ACPI: Video Device [GFX0] (multi-head: yes rom: no post: no)
ProblemType: Bug
DistroRelease: Ubuntu 14.04
Package: linux-image-3.13.0-29-generic 3.13.0-29.53
ProcVersionSignature: Ubuntu 3.13.0-29.53-generic 3.13.11.2
Uname: Linux 3.13.0-29-generic x86_64
ApportVersion: 2.14.1-0ubuntu3.2
Architecture: amd64
AudioDevicesInUse:
USER PID ACCESS COMMAND
/dev/snd/controlC0: ubuntu 1609 F.... pulseaudio
/dev/snd/controlC1: ubuntu 1609 F.... pulseaudio
CRDA:
country TW:
(2402 - 2472 @ 40), (3, 27)
(5270 - 5330 @ 40), (3, 17), DFS
(5735 - 5815 @ 40), (3, 30)
CurrentDesktop: Unity
Date: Thu Jun 19 21:47:08 2014
HibernationDevice: RESUME=UUID=7454cf26-0b42-44d7-ac45-01977170fad5
InstallationDate: Installed on 2014-06-19 (0 days ago)
InstallationMedia: Ubuntu 14.04 LTS "Trusty Tahr" - Release amd64 (20140417)
MachineType: Dell Inc. Inspiron 5547
ProcFB: 0 inteldrmfb
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.13.0-29-generic
root=UUID=3dfa4af3-a788-4fbe-b7db-b895afb04d77 ro quiet splash vt.handoff=7
RelatedPackageVersions:
linux-restricted-modules-3.13.0-29-generic N/A
linux-backports-modules-3.13.0-29-generic N/A
linux-firmware 1.127.2
SourcePackage: linux
StagingDrivers: rts5139
UpgradeStatus: No upgrade log present (probably fresh install)
dmi.bios.date: 02/12/2014
dmi.bios.vendor: Dell Inc.
dmi.bios.version: X18
dmi.board.name: 0598GM
dmi.board.vendor: Dell Inc.
dmi.board.version: X01
dmi.chassis.type: 8
dmi.chassis.vendor: Dell Inc.
dmi.chassis.version: X18
dmi.modalias:
dmi:bvnDellInc.:bvrX18:bd02/12/2014:svnDellInc.:pnInspiron5547:pvrX18:rvnDellInc.:rn0598GM:rvrX01:cvnDellInc.:ct8:cvrX18:
dmi.product.name: Inspiron 5547
dmi.product.version: X18
dmi.sys.vendor: Dell Inc.
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