Public bug reported: CID: 201208-11538 Dell Inspiron 3521
This system was certified: http://www.ubuntu.com/certification/hardware/201208-11538 Brightness control does not work on this system The brightness level indicator would change with hotkey events, but the brightness itself does not. Debugging information: ubuntu@201208-11538:~$ ls /sys/class/backlight acpi_video0 intel_backlight ubuntu@201208-11538:~$ grep -r . /proc/acpi /proc/acpi/battery/BAT1/alarm:alarm: unsupported /proc/acpi/battery/BAT1/state:present: yes /proc/acpi/battery/BAT1/state:capacity state: ok /proc/acpi/battery/BAT1/state:charging state: charged /proc/acpi/battery/BAT1/state:present rate: unknown /proc/acpi/battery/BAT1/state:remaining capacity: 2437 mAh /proc/acpi/battery/BAT1/state:present voltage: 17043 mV /proc/acpi/battery/BAT1/info:present: yes /proc/acpi/battery/BAT1/info:design capacity: 2800 mAh /proc/acpi/battery/BAT1/info:last full capacity: 2437 mAh /proc/acpi/battery/BAT1/info:battery technology: rechargeable /proc/acpi/battery/BAT1/info:design voltage: 14800 mV /proc/acpi/battery/BAT1/info:design capacity warning: 240 mAh /proc/acpi/battery/BAT1/info:design capacity low: 72 mAh /proc/acpi/battery/BAT1/info:cycle count: 0 /proc/acpi/battery/BAT1/info:capacity granularity 1: 264 mAh /proc/acpi/battery/BAT1/info:capacity granularity 2: 3780 mAh /proc/acpi/battery/BAT1/info:model number: DELL FW1MN27C /proc/acpi/battery/BAT1/info:serial number: 0106 /proc/acpi/battery/BAT1/info:battery type: LiIon /proc/acpi/battery/BAT1/info:OEM info: Simplo /proc/acpi/button/lid/LID0/state:state: open /proc/acpi/wakeup:Device S-state Status Sysfs node /proc/acpi/wakeup:P0P1 S0 *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:RP01 S3 *disabled pci:0000:00:1c.0 /proc/acpi/wakeup:RP02 S0 *disabled pci:0000:00:1c.1 /proc/acpi/wakeup:PEG0 S4 *disabled /proc/acpi/wakeup:PEGP S4 *disabled /proc/acpi/wakeup:PEG1 S4 *disabled /proc/acpi/wakeup:PEG2 S4 *disabled /proc/acpi/wakeup:PEG3 S4 *disabled /proc/acpi/wakeup:LID0 S3 *enabled ubuntu@201208-11538:~$ dmesg | grep 'ACPI: Video' ubuntu@201208-11538:~$ Linux version 3.13.0-32-generic (buildd@phianna) (gcc version 4.6.3 (Ubuntu/Linaro 4.6.3-1ubuntu5) ) #57~precise1-Ubuntu SMP Tue Jul 15 03:51:20 UTC 2014 ProblemType: Bug DistroRelease: Ubuntu 12.04 Package: linux-image-3.13.0-32-generic 3.13.0-32.57~precise1 [modified: boot/vmlinuz-3.13.0-32-generic] ProcVersionSignature: Ubuntu 3.13.0-32.57~precise1-generic 3.13.11.4 Uname: Linux 3.13.0-32-generic x86_64 ApportVersion: 2.0.1-0ubuntu17.6 Architecture: amd64 Date: Thu Aug 7 22:09:38 2014 InstallationMedia: Ubuntu 12.04.5 LTS "Precise Pangolin" - Release amd64 (20140806) MarkForUpload: True ProcEnviron: TERM=xterm PATH=(custom, no user) LANG=en_US.UTF-8 SHELL=/bin/bash SourcePackage: linux-lts-trusty UpgradeStatus: No upgrade log present (probably fresh install) ** Affects: linux-lts-trusty (Ubuntu) Importance: Undecided Assignee: Anthony Wong (anthonywong) Status: New ** Tags: 201208-11538 amd64 apport-bug blocks-hwcert precise running-unity taipei-lab ** Attachment added: "DSDT.dsl" https://bugs.launchpad.net/bugs/1354253/+attachment/4172374/+files/DSDT.dsl -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1354253 Title: [Dell Inspiron 3521] Brightness control does not work on 12.04.5 To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux-lts-trusty/+bug/1354253/+subscriptions -- ubuntu-bugs mailing list [email protected] https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
