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Message #54686
[Bug 1304644] Re: [Dell Inspiron 15R 5521] Impossible to adjust the screen backlight
WORKAROUND: add video.use_native_backlight=1 to kernel cmdline
** Description changed:
+ WORKAROUND: video.use_native_backlight=1
+
the change in the level of illumination of the screen, through the
corresponding option in the control panel, has no effect.
ProblemType: Bug
DistroRelease: Ubuntu 14.04
Package: linux-image-3.13.0-23-generic 3.13.0-23.45
ProcVersionSignature: Ubuntu 3.13.0-23.45-generic 3.13.8
Uname: Linux 3.13.0-23-generic x86_64
ApportVersion: 2.14.1-0ubuntu1
Architecture: amd64
AudioDevicesInUse:
- USER PID ACCESS COMMAND
- /dev/snd/controlC0: alex 2122 F.... pulseaudio
- /dev/snd/pcmC0D0p: alex 2122 F...m pulseaudio
+ USER PID ACCESS COMMAND
+ /dev/snd/controlC0: alex 2122 F.... pulseaudio
+ /dev/snd/pcmC0D0p: alex 2122 F...m pulseaudio
CurrentDesktop: Unity
Date: Tue Apr 8 22:14:22 2014
HibernationDevice: RESUME=UUID=f298bdcb-dec7-4870-a147-d0899d622706
InstallationDate: Installed on 2014-04-02 (5 days ago)
InstallationMedia: Ubuntu 14.04 LTS "Trusty Tahr" - Beta amd64 (20140326)
MachineType: Dell Inc. Inspiron 5521
ProcFB: 0 inteldrmfb
ProcKernelCmdLine: BOOT_IMAGE=/vmlinuz-3.13.0-23-generic.efi.signed root=/dev/mapper/ubuntu--vg-root ro quiet splash vt.handoff=7
RelatedPackageVersions:
- linux-restricted-modules-3.13.0-23-generic N/A
- linux-backports-modules-3.13.0-23-generic N/A
- linux-firmware 1.127
+ linux-restricted-modules-3.13.0-23-generic N/A
+ linux-backports-modules-3.13.0-23-generic N/A
+ linux-firmware 1.127
SourcePackage: linux
StagingDrivers: rts5139
UpgradeStatus: No upgrade log present (probably fresh install)
dmi.bios.date: 10/25/2013
dmi.bios.vendor: Dell Inc.
dmi.bios.version: A12
dmi.board.name: 0K08H3
dmi.board.vendor: Dell Inc.
dmi.board.version: A00
dmi.chassis.type: 8
dmi.chassis.vendor: Dell Inc.
dmi.chassis.version: A12
dmi.modalias: dmi:bvnDellInc.:bvrA12:bd10/25/2013:svnDellInc.:pnInspiron5521:pvrA12:rvnDellInc.:rn0K08H3:rvrA00:cvnDellInc.:ct8:cvrA12:
dmi.product.name: Inspiron 5521
dmi.product.version: A12
dmi.sys.vendor: Dell Inc.
** Description changed:
- WORKAROUND: video.use_native_backlight=1
+ WORKAROUND: add video.use_native_backlight=1 to kernel cmdline
the change in the level of illumination of the screen, through the
corresponding option in the control panel, has no effect.
ProblemType: Bug
DistroRelease: Ubuntu 14.04
Package: linux-image-3.13.0-23-generic 3.13.0-23.45
ProcVersionSignature: Ubuntu 3.13.0-23.45-generic 3.13.8
Uname: Linux 3.13.0-23-generic x86_64
ApportVersion: 2.14.1-0ubuntu1
Architecture: amd64
AudioDevicesInUse:
USER PID ACCESS COMMAND
/dev/snd/controlC0: alex 2122 F.... pulseaudio
/dev/snd/pcmC0D0p: alex 2122 F...m pulseaudio
CurrentDesktop: Unity
Date: Tue Apr 8 22:14:22 2014
HibernationDevice: RESUME=UUID=f298bdcb-dec7-4870-a147-d0899d622706
InstallationDate: Installed on 2014-04-02 (5 days ago)
InstallationMedia: Ubuntu 14.04 LTS "Trusty Tahr" - Beta amd64 (20140326)
MachineType: Dell Inc. Inspiron 5521
ProcFB: 0 inteldrmfb
ProcKernelCmdLine: BOOT_IMAGE=/vmlinuz-3.13.0-23-generic.efi.signed root=/dev/mapper/ubuntu--vg-root ro quiet splash vt.handoff=7
RelatedPackageVersions:
linux-restricted-modules-3.13.0-23-generic N/A
linux-backports-modules-3.13.0-23-generic N/A
linux-firmware 1.127
SourcePackage: linux
StagingDrivers: rts5139
UpgradeStatus: No upgrade log present (probably fresh install)
dmi.bios.date: 10/25/2013
dmi.bios.vendor: Dell Inc.
dmi.bios.version: A12
dmi.board.name: 0K08H3
dmi.board.vendor: Dell Inc.
dmi.board.version: A00
dmi.chassis.type: 8
dmi.chassis.vendor: Dell Inc.
dmi.chassis.version: A12
dmi.modalias: dmi:bvnDellInc.:bvrA12:bd10/25/2013:svnDellInc.:pnInspiron5521:pvrA12:rvnDellInc.:rn0K08H3:rvrA00:cvnDellInc.:ct8:cvrA12:
dmi.product.name: Inspiron 5521
dmi.product.version: A12
dmi.sys.vendor: Dell Inc.
--
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https://bugs.launchpad.net/bugs/1304644
Title:
[Dell Inspiron 15R 5521] Impossible to adjust the screen backlight
Status in “linux” package in Ubuntu:
Confirmed
Bug description:
WORKAROUND: add video.use_native_backlight=1 to kernel cmdline
the change in the level of illumination of the screen, through the
corresponding option in the control panel, has no effect.
ProblemType: Bug
DistroRelease: Ubuntu 14.04
Package: linux-image-3.13.0-23-generic 3.13.0-23.45
ProcVersionSignature: Ubuntu 3.13.0-23.45-generic 3.13.8
Uname: Linux 3.13.0-23-generic x86_64
ApportVersion: 2.14.1-0ubuntu1
Architecture: amd64
AudioDevicesInUse:
USER PID ACCESS COMMAND
/dev/snd/controlC0: alex 2122 F.... pulseaudio
/dev/snd/pcmC0D0p: alex 2122 F...m pulseaudio
CurrentDesktop: Unity
Date: Tue Apr 8 22:14:22 2014
HibernationDevice: RESUME=UUID=f298bdcb-dec7-4870-a147-d0899d622706
InstallationDate: Installed on 2014-04-02 (5 days ago)
InstallationMedia: Ubuntu 14.04 LTS "Trusty Tahr" - Beta amd64 (20140326)
MachineType: Dell Inc. Inspiron 5521
ProcFB: 0 inteldrmfb
ProcKernelCmdLine: BOOT_IMAGE=/vmlinuz-3.13.0-23-generic.efi.signed root=/dev/mapper/ubuntu--vg-root ro quiet splash vt.handoff=7
RelatedPackageVersions:
linux-restricted-modules-3.13.0-23-generic N/A
linux-backports-modules-3.13.0-23-generic N/A
linux-firmware 1.127
SourcePackage: linux
StagingDrivers: rts5139
UpgradeStatus: No upgrade log present (probably fresh install)
dmi.bios.date: 10/25/2013
dmi.bios.vendor: Dell Inc.
dmi.bios.version: A12
dmi.board.name: 0K08H3
dmi.board.vendor: Dell Inc.
dmi.board.version: A00
dmi.chassis.type: 8
dmi.chassis.vendor: Dell Inc.
dmi.chassis.version: A12
dmi.modalias: dmi:bvnDellInc.:bvrA12:bd10/25/2013:svnDellInc.:pnInspiron5521:pvrA12:rvnDellInc.:rn0K08H3:rvrA00:cvnDellInc.:ct8:cvrA12:
dmi.product.name: Inspiron 5521
dmi.product.version: A12
dmi.sys.vendor: Dell Inc.
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References
