[Bug 1681493] ProcModules.txt

[aljosa]

apport information

** Attachment added: "ProcModules.txt"
   https://bugs.launchpad.net/bugs/1681493/+attachment/4859745/+files/ProcModules.txt

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Title:
  Ubuntu Zesty: Problem With Screen Brightness Settings

Status in NVIDIA Drivers Ubuntu:
  New
Status in nvidia-graphics-drivers-375 package in Ubuntu:
  New
Status in systemd package in Ubuntu:
  New

Bug description:
  Non-Optimus laptop ASUS G752VS (Nvidia GTX1070)
  Ubuntu 17.04
  Xorg-Server-1.19.3
  Nvidia driver 375.39

  Situation on 2017-04-05:
  Ubuntu 17.04 doesn't save my brightness settings. I can adjust the screen brightness, but after restarting the screen brightness of my laptop resets to maximum.

  Situation on 2017-04-08:
  Today I received many Ubuntu updates (kernel included), and I also installed freshly released Nvidia 381.09 driver (via “Graphics Drivers” team - Proprietary GPU Drivers PPA).
  Now brightness settings are correctly saved, but I have a new problem: changing brightness level doesn't produce any effect (both with or without Nvidia driver installed)

  Inside "/sys/class/backlight/" I have two folders: "acpi_video0" and
  "acpi_video1"

  ~$ systemctl status systemd-backlight at backlight:acpi_video0.service
  ● systemd-backlight at backlight:acpi_video0.service - Load/Save Screen Backlight B
     Loaded: loaded (/lib/systemd/system/systemd-backlight at .service; static; vendo
     Active: active (exited) since Sat 2017-04-08 13:37:31 CEST; 16min ago
       Docs: man:systemd-backlight at .service(8)
   Main PID: 683 (code=exited, status=0/SUCCESS)

  ~$ systemctl status systemd-backlight at backlight:acpi_video1.service
  ● systemd-backlight at backlight:acpi_video1.service - Load/Save Screen Backlight B
     Loaded: loaded (/lib/systemd/system/systemd-backlight at .service; static; vendo
     Active: active (exited) since Sat 2017-04-08 13:37:31 CEST; 22min ago
       Docs: man:systemd-backlight at .service(8)
   Main PID: 684 (code=exited, status=0/SUCCESS)

  Situation on 2017-04-10:
  I purged Nvidia 381.09 driver and reinstalled default Nvidia 375.39 via additional drivers.
  Now the situation has returned to initial problem: I can again adjust the screen brightness, but after restarting the screen brightness of my laptop again resets to maximum.
  --- 
  ApportVersion: 2.20.4-0ubuntu3
  Architecture: amd64
  DistroRelease: Ubuntu 17.04
  InstallationDate: Installed on 2017-01-02 (98 days ago)
  InstallationMedia: Ubuntu 17.04 "Zesty Zapus" - Alpha amd64 (20161229)
  Lsusb:
   Bus 002 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub
   Bus 001 Device 004: ID 0b05:1837 ASUSTek Computer, Inc. 
   Bus 001 Device 003: ID 0bda:57fa Realtek Semiconductor Corp. 
   Bus 001 Device 002: ID 04d9:a070 Holtek Semiconductor, Inc. 
   Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
  MachineType: ASUSTeK COMPUTER INC. G752VS
  NonfreeKernelModules: nvidia_uvm nvidia_drm nvidia_modeset nvidia
  Package: systemd 232-21ubuntu2
  PackageArchitecture: amd64
  ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-4.10.0-19-generic.efi.signed root=UUID=1cb200eb-669b-45c4-af32-e67f66a464f2 ro quiet splash vt.handoff=7
  ProcVersionSignature: Ubuntu 4.10.0-19.21-generic 4.10.8
  Tags:  zesty
  Uname: Linux 4.10.0-19-generic x86_64
  UpgradeStatus: No upgrade log present (probably fresh install)
  UserGroups:
   
  _MarkForUpload: True
  dmi.bios.date: 10/19/2016
  dmi.bios.vendor: American Megatrends Inc.
  dmi.bios.version: G752VS.306
  dmi.board.asset.tag: ATN12345678901234567
  dmi.board.name: G752VS
  dmi.board.vendor: ASUSTeK COMPUTER INC.
  dmi.board.version: 1.0
  dmi.chassis.asset.tag: ATN12345678901234567
  dmi.chassis.type: 10
  dmi.chassis.vendor: ASUSTeK COMPUTER INC.
  dmi.chassis.version: 1.0
  dmi.modalias: dmi:bvnAmericanMegatrendsInc.:bvrG752VS.306:bd10/19/2016:svnASUSTeKCOMPUTERINC.:pnG752VS:pvr1.0:rvnASUSTeKCOMPUTERINC.:rnG752VS:rvr1.0:cvnASUSTeKCOMPUTERINC.:ct10:cvr1.0:
  dmi.product.name: G752VS
  dmi.product.version: 1.0
  dmi.sys.vendor: ASUSTeK COMPUTER INC.

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