** Tags added: latest-bios-1.16 ** Package changed: linux-lts-raring (Ubuntu) => linux-lts-trusty (Ubuntu)
-- You received this bug notification because you are a member of Kernel Packages, which is subscribed to linux-lts-raring in Ubuntu. https://bugs.launchpad.net/bugs/1255014 Title: [Lenovo V480] Unable to control the brightness from Max - Min Status in linux-lts-trusty package in Ubuntu: Triaged Bug description: CID: 201204-10924 Lenovo V480 With the Brightness applet, the brightness level on this system cannot be adjusted from Max (let's say, level 11) to Min (level 1). The brightness level will goes down and up, which behaves like 11-10-9-8-7-6-5-4-3-4-5 Steps: 1. Install 12.04.3 + update (3.8.0-33), boot to desktop 2. Adjust the screen brightness by the Brightness and Lock applet, clicking the leftmost part of the scroll bar to change the brightness stepwise 3. Click and drag the slider to adjust the brightness Expected result: - Brightness could be adjusted smoothly. Actual result: 1. Brightness cannot go down to the lowest level, it behaves like 11-10-9-8-7-6-5-4-3-4-5 2. When you drag and move the slider, the backlight will flash between Max and the indicated level. Debugging information: $ ls /sys/class/backlight acpi_video0@ intel_backlight@ $ dmesg | grep 'ACPI: Video' [ 7.104361] ACPI: Video Device [PEGP] (multi-head: no rom: yes post: no) [ 7.107524] ACPI: Video Device [GFX0] (multi-head: yes rom: no post: no) $ cat /proc/version Linux version 3.8.0-33-generic (buildd@toyol) (gcc version 4.6.3 (Ubuntu/Linaro 4.6.3-1ubuntu5) ) #48~precise1-Ubuntu SMP Thu Oct 24 16:28:06 UTC 2013 Note: the hotkey is probably affected by bug 1248442, but it will cause the same result when it's working. ProblemType: Bug DistroRelease: Ubuntu 12.04 Package: linux-image-3.8.0-33-generic 3.8.0-33.48~precise1 ProcVersionSignature: Ubuntu 3.8.0-33.48~precise1-generic 3.8.13.11 Uname: Linux 3.8.0-33-generic x86_64 AlsaVersion: Advanced Linux Sound Architecture Driver Version k3.8.0-33-generic. ApportVersion: 2.0.1-0ubuntu17.6 Architecture: amd64 ArecordDevices: **** List of CAPTURE Hardware Devices **** card 0: PCH [HDA Intel PCH], device 0: ALC269VC Analog [ALC269VC Analog] Subdevices: 1/1 Subdevice #0: subdevice #0 AudioDevicesInUse: USER PID ACCESS COMMAND /dev/snd/controlC0: ubuntu 1776 F.... pulseaudio CRDA: Error: [Errno 2] No such file or directory Card0.Amixer.info: Card hw:0 'PCH'/'HDA Intel PCH at 0xf3610000 irq 47' Mixer name : 'Intel PantherPoint HDMI' Components : 'HDA:10ec0269,17aa5002,00100202 HDA:80862806,80860101,00100000' Controls : 29 Simple ctrls : 11 Card29.Amixer.info: Card hw:29 'ThinkPadEC'/'ThinkPad Console Audio Control at EC reg 0x30, fw unknown' Mixer name : 'ThinkPad EC (unknown)' Components : '' Controls : 1 Simple ctrls : 1 Card29.Amixer.values: Simple mixer control 'Console',0 Capabilities: pswitch pswitch-joined penum Playback channels: Mono Mono: Playback [on] Date: Tue Nov 26 01:10:44 2013 HibernationDevice: RESUME=UUID=0a4cd402-c938-4cc7-a55d-6230c539e25d InstallationMedia: Ubuntu 12.04.3 LTS "Precise Pangolin" - Release amd64 (20130820.1) MachineType: LENOVO 814TD01 MarkForUpload: True ProcEnviron: TERM=xterm PATH=(custom, no user) LANG=en_US.UTF-8 SHELL=/bin/bash ProcFB: 0 inteldrmfb 1 nouveaufb ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.8.0-33-generic root=UUID=6a396d09-0ad3-41a0-9d7d-18446b177e9d ro quiet splash vt.handoff=7 RelatedPackageVersions: linux-restricted-modules-3.8.0-33-generic N/A linux-backports-modules-3.8.0-33-generic N/A linux-firmware 1.79.7 SourcePackage: linux-lts-raring StagingDrivers: keucr UpgradeStatus: No upgrade log present (probably fresh install) dmi.bios.date: 04/10/2013 dmi.bios.vendor: LENOVO dmi.bios.version: H5ET73WW(1.16) dmi.board.asset.tag: Not Available dmi.board.name: 814TD01 dmi.board.vendor: LENOVO dmi.board.version: Not Available dmi.chassis.asset.tag: No Asset Information dmi.chassis.type: 10 dmi.chassis.vendor: LENOVO dmi.chassis.version: Not Available dmi.modalias: dmi:bvnLENOVO:bvrH5ET73WW(1.16):bd04/10/2013:svnLENOVO:pn814TD01:pvrLenovoV480:rvnLENOVO:rn814TD01:rvrNotAvailable:cvnLENOVO:ct10:cvrNotAvailable: dmi.product.name: 814TD01 dmi.product.version: Lenovo V480 dmi.sys.vendor: LENOVO To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux-lts-trusty/+bug/1255014/+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
