** Changed in: linux (Ubuntu) Status: Confirmed => Won't Fix -- You received this bug notification because you are a member of Kernel Packages, which is subscribed to linux in Ubuntu. https://bugs.launchpad.net/bugs/1407604
Title: [Dell Inspiron 7548] Brightness control does not work on 14.04.1 Status in HWE Next: Won't Fix Status in linux package in Ubuntu: Won't Fix Bug description: CID: 201408-15450 Inspiron 7548 Brightness control does not work on this system with 14.04.1 The brightness level indicator would change with hotkey events, but the brightness itself does not. Debugging information: root@201408-15450:~$ ls /sys/class/backlight acpi_video0 intel_backlight root@201408-15450:~$ grep -r . /proc/acpi /proc/acpi/battery/BAT0/alarm:alarm: unsupported /proc/acpi/battery/BAT0/state:present: yes /proc/acpi/battery/BAT0/state:capacity state: ok /proc/acpi/battery/BAT0/state:charging state: charging /proc/acpi/battery/BAT0/state:present rate: 474 mA /proc/acpi/battery/BAT0/state:remaining capacity: 3811 mAh /proc/acpi/battery/BAT0/state:present voltage: 13006 mV /proc/acpi/battery/BAT0/info:present: yes /proc/acpi/battery/BAT0/info:design capacity: 3900 mAh /proc/acpi/battery/BAT0/info:last full capacity: 3900 mAh /proc/acpi/battery/BAT0/info:battery technology: non-rechargeable /proc/acpi/battery/BAT0/info:design voltage: 11400 mV /proc/acpi/battery/BAT0/info:design capacity warning: 390 mAh /proc/acpi/battery/BAT0/info:design capacity low: 0 mAh /proc/acpi/battery/BAT0/info:cycle count: 0 /proc/acpi/battery/BAT0/info:capacity granularity 1: 100 mAh /proc/acpi/battery/BAT0/info:capacity granularity 2: 0 mAh /proc/acpi/battery/BAT0/info:model number: Dell /proc/acpi/battery/BAT0/info:serial number: 480 /proc/acpi/battery/BAT0/info:battery type: LION /proc/acpi/battery/BAT0/info:OEM info: SIMPLO /proc/acpi/button/lid/LID0/state:state: open /proc/acpi/ac_adapter/ADP1/state:state: on-line /proc/acpi/wakeup:Device S-state Status Sysfs node /proc/acpi/wakeup:RP01 S4 *disabled pci:0000:00:1c.0 /proc/acpi/wakeup:PXSX S4 *disabled /proc/acpi/wakeup:RP04 S4 *disabled pci:0000:00:1c.3 /proc/acpi/wakeup:PXSX S4 *disabled pci:0000:07:00.0 /proc/acpi/wakeup:RP05 S4 *disabled pci:0000:00:1c.4 /proc/acpi/wakeup:PXSX S4 *disabled /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:HDEF S4 *disabled pci:0000:00:1b.0 /proc/acpi/wakeup:LID0 S3 *enabled root@201408-15450:~$ dmesg | grep 'ACPI: Video' [ 2.843516] ACPI: Video Device [GFX0] (multi-head: yes rom: no post: no) root@201408-15450:~$ ProblemType: Bug DistroRelease: Ubuntu 14.04 Package: linux-image-3.13.0-43-generic 3.13.0-43.72 ProcVersionSignature: Ubuntu 3.13.0-43.72-generic 3.13.11.11 Uname: Linux 3.13.0-43-generic x86_64 ApportVersion: 2.14.1-0ubuntu3.6 Architecture: amd64 AudioDevicesInUse: USER PID ACCESS COMMAND /dev/snd/controlC1: ubuntu 1512 F.... pulseaudio /dev/snd/controlC0: ubuntu 1512 F.... pulseaudio CRDA: country TW: (2402 - 2472 @ 40), (3, 27) (5270 - 5330 @ 40), (3, 17), DFS (5735 - 5815 @ 40), (3, 30) CurrentDesktop: Unity Date: Mon Jan 5 04:10:59 2015 HibernationDevice: RESUME=UUID=87828d2c-0d30-454b-90f1-ed89c2790e76 InstallationDate: Installed on 2015-01-05 (0 days ago) InstallationMedia: Ubuntu 14.04.1 LTS "Trusty Tahr" - Release amd64 (20140722.2) MachineType: Dell Inc. Inspiron 7548 ProcFB: 0 inteldrmfb ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.13.0-43-generic.efi.signed root=UUID=4cf32401-def5-4cf9-a237-f0bfb729a6cc ro quiet splash vt.handoff=7 RelatedPackageVersions: linux-restricted-modules-3.13.0-43-generic N/A linux-backports-modules-3.13.0-43-generic N/A linux-firmware 1.127.10 SourcePackage: linux UpgradeStatus: No upgrade log present (probably fresh install) dmi.bios.date: 11/19/2014 dmi.bios.vendor: Dell Inc. dmi.bios.version: A00 dmi.board.vendor: Dell Inc. dmi.chassis.type: 8 dmi.chassis.vendor: Dell Inc. dmi.chassis.version: Not Specified dmi.modalias: dmi:bvnDellInc.:bvrA00:bd11/19/2014:svnDellInc.:pnInspiron7548:pvrA00:rvnDellInc.:rn:rvr:cvnDellInc.:ct8:cvrNotSpecified: dmi.product.name: Inspiron 7548 dmi.product.version: A00 dmi.sys.vendor: Dell Inc. To manage notifications about this bug go to: https://bugs.launchpad.net/hwe-next/+bug/1407604/+subscriptions -- Mailing list: https://launchpad.net/~kernel-packages Post to : kernel-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~kernel-packages More help : https://help.launchpad.net/ListHelp