** Package changed: xorg (Ubuntu) => linux (Ubuntu)
** Also affects: upower (Ubuntu)
Importance: Undecided
Status: New
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https://bugs.launchpad.net/bugs/1812161
Title:
Screen backlight control does not work in Disco on Dell XPS 9560
Status in linux package in Ubuntu:
Incomplete
Status in upower package in Ubuntu:
Incomplete
Bug description:
When I press the screen backlight up/down buttons, gnome-shell pops up
the backlight control window saying that the backlight is being
adjusted, but the actual screen brightness does not change.
The problem is that gnome is adjusting
/sys/class/backlight/acpi_video0/brightness instead of
/sys/class/backlight/intel_backlight/brightness. If I manually change
the latter as root with, say:
root@xps-9560:~ echo 600 >
/sys/class/backlight/intel_backlight/brightness
then the brightness changes.
The brightness control worked fine in Cosmic on this laptop, so this
is a regression.
ProblemType: Bug
DistroRelease: Ubuntu 19.04
Package: xorg 1:7.7+19ubuntu8
ProcVersionSignature: Ubuntu 4.18.0-13.14-generic 4.18.17
Uname: Linux 4.18.0-13-generic x86_64
.tmp.unity_support_test.0:
ApportVersion: 2.20.10-0ubuntu18
Architecture: amd64
CompizPlugins: No value set for
`/apps/compiz-1/general/screen0/options/active_plugins'
CompositorRunning: None
CurrentDesktop: ubuntu:GNOME
Date: Thu Jan 17 14:47:37 2019
DistUpgraded: 2019-01-15 23:10:12,938 DEBUG Running PostInstallScript:
'./xorg_fix_proprietary.py'
DistroCodename: disco
DistroVariant: ubuntu
DkmsStatus:
bbswitch, 0.8, 4.18.0-13-generic, x86_64: installed
bbswitch, 0.8, 4.20.0-042000-generic, x86_64: installed
bbswitch, 0.8, 4.20.3-042003-generic, x86_64: installed
nvidia, 415.27, 4.20.0-042000-generic, x86_64: installed
nvidia, 415.27, 4.20.3-042003-generic, x86_64: installed
ExtraDebuggingInterest: Yes
GraphicsCard:
Intel Corporation Device [8086:591b] (rev 04) (prog-if 00 [VGA controller])
Subsystem: Dell Device [1028:07be]
Subsystem: Dell GP107M [GeForce GTX 1050 Mobile] [1028:07be]
InstallationDate: Installed on 2017-08-16 (518 days ago)
InstallationMedia: Ubuntu 17.04 "Zesty Zapus" - Release amd64 (20170412)
MachineType: Dell Inc. XPS 15 9560
ProcKernelCmdLine: BOOT_IMAGE=/@/boot/vmlinuz-4.18.0-13-generic
root=UUID=0eb64261-6dff-464a-8373-596794c1fafe ro rootflags=subvol=@ quiet
splash acpi_rev_override=5 scsi_mod.use_blk_mq=1 i915.modeset=1 nouveau.runpm=0
rcutree.rcu_idle_gp_delay=1 acpi_osi=! "acpi_osi=Windows 2009"
SourcePackage: xorg
Symptom: display
UpgradeStatus: Upgraded to disco on 2019-01-15 (1 days ago)
dmi.bios.date: 10/02/2018
dmi.bios.vendor: Dell Inc.
dmi.bios.version: 1.12.1
dmi.board.name: 05FFDN
dmi.board.vendor: Dell Inc.
dmi.board.version: A00
dmi.chassis.type: 10
dmi.chassis.vendor: Dell Inc.
dmi.modalias:
dmi:bvnDellInc.:bvr1.12.1:bd10/02/2018:svnDellInc.:pnXPS159560:pvr:rvnDellInc.:rn05FFDN:rvrA00:cvnDellInc.:ct10:cvr:
dmi.product.family: XPS
dmi.product.name: XPS 15 9560
dmi.product.sku: 07BE
dmi.sys.vendor: Dell Inc.
version.compiz: compiz 1:0.9.13.1+19.04.20190103-0ubuntu1
version.libdrm2: libdrm2 2.4.95-1
version.libgl1-mesa-dri: libgl1-mesa-dri 18.2.8-2ubuntu1
version.libgl1-mesa-glx: libgl1-mesa-glx 18.2.8-2ubuntu1
version.xserver-xorg-core: xserver-xorg-core 2:1.20.3-1ubuntu1
version.xserver-xorg-input-evdev: xserver-xorg-input-evdev N/A
version.xserver-xorg-video-ati: xserver-xorg-video-ati 1:18.1.0-1
version.xserver-xorg-video-intel: xserver-xorg-video-intel N/A
version.xserver-xorg-video-nouveau: xserver-xorg-video-nouveau 1:1.0.15-3
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