A customer of mine gave me his old notebook because he bought a new one.
The laptop is running an p to date Xubuntu 13.10 64bit. Now I'm
suffering similar issue with brightness control: when I press the
appropriate keys on keyboard the slide appears on the upper right corner
of the screen but even if it changes the setting has no effect on the
system . The notebook I have has an Intel X3100 integrated video
00:02.0 VGA compatible controller: Intel Corporation Mobile GM965/GL960
Integrated Graphics Controller (primary) (rev 0c)
I tried different combinations on grub but no one resolved the issue.
Problem is I have not intel_backlight on /sys/class/backlight folder but
just acpi_video0 or dell_backlight (if I set acpi_backlight=vendor on
grub).
------------------
effe@Vostro1310:/sys/class/backlight$ for i in /sys/class/backlight/*; do echo
-e "\n $i"; cat $i/{brightness,max_brightness,actual_brightness}; done
/sys/class/backlight/dell_backlight
1
7
1
------------------
If I increase the backlight the files are correctly updated:
------------------
/sys/class/backlight/dell_backlight
7
7
7
------------------
acpi_listen works just on new mainline kernel 3.13.2 (tried bot generic and
lowlatency) on stock kernel there isn't output at all:
video/brightnessup BRTUP 00000086 00000000 K
video/brightnessup BRTUP 00000086 00000000 K
video/brightnessup BRTUP 00000086 00000000 K
video/brightnessdown BRTDN 00000087 00000000 K
video/brightnessdown BRTDN 00000087 00000000 K
video/brightnessdown BRTDN 00000087 00000000 K
Now I'm using xrandr to change the brightness:
effe@Vostro1310:/sys/class/backlight$ xrandr --output LVDS1 --brightness
0.5
What can I try to triage the issue?
Thanks.
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You received this bug notification because you are a member of Kernel
Packages, which is subscribed to linux in Ubuntu.
https://bugs.launchpad.net/bugs/1261853
Title:
8086:0166 [Dell Inspiron 15R 5521] Impossible to adjust the screen
backlight
Status in “linux” package in Ubuntu:
Triaged
Bug description:
the change in the level of illumination of the screen, through the
corresponding option in the control panel, has no effect.
Upstream post: http://www.spinics.net/lists/linux-acpi/msg48075.html
WORKAROUND: In Ubuntu kernel only, version 3.11.0-14-generic tested:
acpi_backlight=vendor
WORKAROUND: In mainline only:
video.use_native_backlight=1
ProblemType: Bug
DistroRelease: Ubuntu 13.10
Package: linux-image-3.11.0-14-generic 3.11.0-14.21
ProcVersionSignature: Ubuntu 3.11.0-14.21-generic 3.11.7
Uname: Linux 3.11.0-14-generic x86_64
ApportVersion: 2.12.5-0ubuntu2.1
Architecture: amd64
AudioDevicesInUse:
USER PID ACCESS COMMAND
/dev/snd/controlC0: alex 1443 F.... pulseaudio
alex 11159 F.... pulseaudio
Date: Tue Dec 17 18:50:13 2013
HibernationDevice: RESUME=UUID=04335018-6e1d-453d-a8ba-25ae1c34f2eb
InstallationDate: Installed on 2013-12-14 (2 days ago)
InstallationMedia: Ubuntu 13.10 "Saucy Salamander" - Release amd64
(20131016.1)
MachineType: Dell Inc. Inspiron 5521
MarkForUpload: True
ProcEnviron:
LANGUAGE=it
PATH=(custom, no user)
XDG_RUNTIME_DIR=<set>
LANG=it_IT.UTF-8
SHELL=/bin/bash
ProcFB: 0 inteldrmfb
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.11.0-14-generic.efi.signed
root=UUID=d4cdcfba-0a53-41d0-a9ce-0516d3fab0f0 ro quiet splash vt.handoff=7
RelatedPackageVersions:
linux-restricted-modules-3.11.0-14-generic N/A
linux-backports-modules-3.11.0-14-generic N/A
linux-firmware 1.116
SourcePackage: linux
StagingDrivers: rts5139
UpgradeStatus: No upgrade log present (probably fresh install)
dmi.bios.date: 02/22/2013
dmi.bios.vendor: Dell Inc.
dmi.bios.version: A06
dmi.board.name: 0K08H3
dmi.board.vendor: Dell Inc.
dmi.board.version: A00
dmi.chassis.type: 8
dmi.chassis.vendor: Dell Inc.
dmi.chassis.version: A06
dmi.modalias:
dmi:bvnDellInc.:bvrA06:bd02/22/2013:svnDellInc.:pnInspiron5521:pvrA06:rvnDellInc.:rn0K08H3:rvrA00:cvnDellInc.:ct8:cvrA06:
dmi.product.name: Inspiron 5521
dmi.product.version: A06
dmi.sys.vendor: Dell Inc.
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