group.of.nepali.translators team mailing list archive

[Joseph Salisbury <joseph.salisbury@xxxxxxxxxxxxx>]

Can you test the following kernels to see when this bug was introduced
upstream:

4.4.41: http://kernel.ubuntu.com/~kernel-ppa/mainline/v4.4.40/
4.4.41: http://kernel.ubuntu.com/~kernel-ppa/mainline/v4.4.41/
4.4.42: http://kernel.ubuntu.com/~kernel-ppa/mainline/v4.4.42/
4.4.43: http://kernel.ubuntu.com/~kernel-ppa/mainline/v4.4.43/
4.4.44: http://kernel.ubuntu.com/~kernel-ppa/mainline/v4.4.44/

You don't have to test every kernel, just up until the kernel that first
has this bug.

Thanks in advance!

** Also affects: linux (Ubuntu Xenial)
   Importance: Undecided
       Status: New

** Changed in: linux (Ubuntu Xenial)
       Status: New => Triaged

** Changed in: linux (Ubuntu)
       Status: Confirmed => Triaged

** Changed in: linux (Ubuntu Xenial)
   Importance: Undecided => Medium

** Tags removed: needs-bisect
** Tags added: performing-bisect

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Matching subscriptions: Ubuntu 16.04 Bugs
https://bugs.launchpad.net/bugs/1667323

Title:
  Backlight control does not work and there are no entries in
  /sys/class/backlight

Status in linux package in Ubuntu:
  Triaged
Status in linux source package in Xenial:
  Triaged

Bug description:
  It was working fine until today. 
  The folder /sys/class/backlight/ use to have "acpi_video0/brightness", but now is empty. 
  I am using Nvidia Proprietary driver 340.101 (proprietary, tested). The problem persists even with the 304 driver.

  ProblemType: Bug
  DistroRelease: Ubuntu 16.04
  Package: linux-image-4.4.0-64-generic 4.4.0-64.85
  ProcVersionSignature: Ubuntu 4.4.0-64.85-generic 4.4.44
  Uname: Linux 4.4.0-64-generic x86_64
  NonfreeKernelModules: nvidia_uvm nvidia
  ApportVersion: 2.20.1-0ubuntu2.5
  Architecture: amd64
  AudioDevicesInUse:
   USER        PID ACCESS COMMAND
   /dev/snd/controlC1:  desgua     2028 F.... pulseaudio
   /dev/snd/controlC0:  desgua     2028 F.... pulseaudio
  CurrentDesktop: Unity
  Date: Thu Feb 23 11:31:18 2017
  HibernationDevice: RESUME=UUID=f23a6347-9483-460e-aa29-cbc47850f890
  InstallationDate: Installed on 2014-05-01 (1028 days ago)
  InstallationMedia: Ubuntu 14.04 LTS "Trusty Tahr" - Release amd64 (20140417)
  Lsusb:
   Bus 002 Device 003: ID 064e:a127 Suyin Corp. 
   Bus 002 Device 002: ID 8087:0020 Intel Corp. Integrated Rate Matching Hub
   Bus 002 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
   Bus 001 Device 002: ID 8087:0020 Intel Corp. Integrated Rate Matching Hub
   Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
  MachineType: Hewlett-Packard HP Pavilion dv6 Notebook PC
  ProcFB:
   
  ProcKernelCmdLine: BOOT_IMAGE=/vmlinuz-4.4.0-64-generic root=/dev/mapper/ubuntu--vg-root ro
  RelatedPackageVersions:
   linux-restricted-modules-4.4.0-64-generic N/A
   linux-backports-modules-4.4.0-64-generic  N/A
   linux-firmware                            1.157.8
  SourcePackage: linux
  UpgradeStatus: Upgraded to xenial on 2016-08-17 (189 days ago)
  dmi.bios.date: 12/03/2009
  dmi.bios.vendor: Hewlett-Packard
  dmi.bios.version: F.13
  dmi.board.asset.tag: Base Board Asset Tag
  dmi.board.name: 3659
  dmi.board.vendor: Hewlett-Packard
  dmi.board.version: 32.23
  dmi.chassis.type: 10
  dmi.chassis.vendor: Hewlett-Packard
  dmi.chassis.version: N/A
  dmi.modalias: dmi:bvnHewlett-Packard:bvrF.13:bd12/03/2009:svnHewlett-Packard:pnHPPaviliondv6NotebookPC:pvr049D210000241210000020000:rvnHewlett-Packard:rn3659:rvr32.23:cvnHewlett-Packard:ct10:cvrN/A:
  dmi.product.name: HP Pavilion dv6 Notebook PC
  dmi.product.version: 049D210000241210000020000
  dmi.sys.vendor: Hewlett-Packard

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