Status changed to 'Confirmed' because the bug affects multiple users.
** Changed in: systemd (Ubuntu)
Status: New => Confirmed
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https://bugs.launchpad.net/bugs/1681493
Title:
Ubuntu Zesty: Problem With Screen Brightness Settings
Status in NVIDIA Drivers Ubuntu:
New
Status in nvidia-graphics-drivers-375 package in Ubuntu:
Confirmed
Status in systemd package in Ubuntu:
Confirmed
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@backlight:acpi_video0.service
● systemd-backlight@backlight:acpi_video0.service - Load/Save Screen
Backlight B
Loaded: loaded (/lib/systemd/system/systemd-backlight@.service; static;
vendo
Active: active (exited) since Sat 2017-04-08 13:37:31 CEST; 16min ago
Docs: man:systemd-backlight@.service(8)
Main PID: 683 (code=exited, status=0/SUCCESS)
~$ systemctl status systemd-backlight@backlight:acpi_video1.service
● systemd-backlight@backlight:acpi_video1.service - Load/Save Screen
Backlight B
Loaded: loaded (/lib/systemd/system/systemd-backlight@.service; static;
vendo
Active: active (exited) since Sat 2017-04-08 13:37:31 CEST; 22min ago
Docs: man:systemd-backlight@.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.
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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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