** Description changed: the change in the level of illumination of the screen, through the corresponding option in the control panel, has no effect. - WORKAROUND: Works only with Ubuntu kernel version 3.11.0-14-generic, as in the v.3.13-rc3 produces black screen: + Upstream post: http://www.spinics.net/lists/linux-acpi/msg48075.html + + WORKAROUND: In Ubuntu kernel only, version 3.11.0-14-generic tested: acpi_backlight=vendor - Upstream post: http://www.spinics.net/lists/linux-acpi/msg48075.html + WORKAROUND: In mainline only: + video.use_native_backlight=1 ProblemType: Bug DistroRelease: Ubuntu 13.10 Package: linux-image-3.11.0-14-generic 3.11.0-14.21 ProcVersionSignature: Ubuntu 3.11.0-14.21-generic 3.11.7 Uname: Linux 3.11.0-14-generic x86_64 ApportVersion: 2.12.5-0ubuntu2.1 Architecture: amd64 AudioDevicesInUse: USER PID ACCESS COMMAND /dev/snd/controlC0: alex 1443 F.... pulseaudio alex 11159 F.... pulseaudio Date: Tue Dec 17 18:50:13 2013 HibernationDevice: RESUME=UUID=04335018-6e1d-453d-a8ba-25ae1c34f2eb InstallationDate: Installed on 2013-12-14 (2 days ago) InstallationMedia: Ubuntu 13.10 "Saucy Salamander" - Release amd64 (20131016.1) MachineType: Dell Inc. Inspiron 5521 MarkForUpload: True ProcEnviron: LANGUAGE=it PATH=(custom, no user) XDG_RUNTIME_DIR=<set> LANG=it_IT.UTF-8 SHELL=/bin/bash ProcFB: 0 inteldrmfb ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.11.0-14-generic.efi.signed root=UUID=d4cdcfba-0a53-41d0-a9ce-0516d3fab0f0 ro quiet splash vt.handoff=7 RelatedPackageVersions: linux-restricted-modules-3.11.0-14-generic N/A linux-backports-modules-3.11.0-14-generic N/A linux-firmware 1.116 SourcePackage: linux StagingDrivers: rts5139 UpgradeStatus: No upgrade log present (probably fresh install) dmi.bios.date: 02/22/2013 dmi.bios.vendor: Dell Inc. dmi.bios.version: A06 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: A06 dmi.modalias: dmi:bvnDellInc.:bvrA06:bd02/22/2013:svnDellInc.:pnInspiron5521:pvrA06:rvnDellInc.:rn0K08H3:rvrA00:cvnDellInc.:ct8:cvrA06: dmi.product.name: Inspiron 5521 dmi.product.version: A06 dmi.sys.vendor: Dell Inc.
-- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1261853 Title: 8086:0166 [Dell Inspiron 15R 5521] Impossible to adjust the screen backlight To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1261853/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
