Asif Youssuff, could you please test the latest upstream kernel available from
the very top line at the top of the page (the release names are irrelevant for
testing in your release) following https://wiki.ubuntu.com/KernelMainlineBuilds
? It will allow additional upstream developers to examine the issue. Once
you've tested the upstream kernel, please comment on which kernel version
specifically you tested. If this bug is fixed in the mainline kernel, please
add the following tags:
kernel-fixed-upstream
kernel-fixed-upstream-VERSION-NUMBER
where VERSION-NUMBER is the version number of the kernel you tested exactly
shown as:
kernel-fixed-upstream-3.18-rc3
This can be done by clicking on the yellow circle with a black pencil
icon next to the word Tags located at the bottom of the bug description.
If the mainline kernel does not fix this bug, please add the following tags:
kernel-bug-exists-upstream
kernel-bug-exists-upstream-VERSION-NUMBER
Once testing of the upstream kernel is complete, please mark this bug's
Status as Confirmed. Please let us know your results. Thank you for your
understanding.
** Tags removed: bios-outdated-44cn43ww
** Tags added: latest-bios-44cn43ww
** Changed in: linux (Ubuntu)
Status: Confirmed => Incomplete
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https://bugs.launchpad.net/bugs/1388636
Title:
[Lenovo V570 Notebook] Brightness not changing via UI widget in GNOME
shell or hotkeys
Status in “linux” package in Ubuntu:
Incomplete
Bug description:
Fresh install of a Vivid Vervet Ubuntu GNOME daily iso.
Adding debugging information from
https://wiki.ubuntu.com/Kernel/Debugging/Backlight
I found that
echo 8 > /sys/class/backlight/intel_backlight/brightness
worked to lower my screen brightness, without playing with kernel
parameters.
Booting with the kernel parameter: acpi_backlight=vendor did not
enable the UI widget or hotkeys, although echo 8 >
/sys/class/backlight/intel_backlight/brightness continued to work.
Booting with the kernel parameter: video.use_bios_initial_backlight=0
did not allow for hotkey or widget changes of brightness.
Booting with the kernel parameter: video.use_native_backlight=1
Creating /usr/share/X11/xorg.conf.d/80-backlight.conf
with the contents:
Section "Device"
Identifier "Intel Graphics"
Driver "intel"
Option "AccelMethod" "sna"
Option "Backlight" "intel_backlight" # use your backlight that
works here
BusID "PCI:0:2:0"
EndSection
and rebooting does resolve the issue.
ProblemType: Bug
DistroRelease: Ubuntu 15.04
Package: linux-image-3.16.0-24-generic 3.16.0-24.32 [modified:
boot/vmlinuz-3.16.0-24-generic]
ProcVersionSignature: Ubuntu 3.16.0-24.32-generic 3.16.4
Uname: Linux 3.16.0-24-generic x86_64
ApportVersion: 2.14.7-0ubuntu9
Architecture: amd64
AudioDevicesInUse:
USER PID ACCESS COMMAND
/dev/snd/controlC0: asif 2318 F.... pulseaudio
CurrentDesktop: GNOME
Date: Sun Nov 2 15:48:05 2014
HibernationDevice: RESUME=UUID=53025272-1910-418a-9f4a-b6ac00a768f1
InstallationDate: Installed on 2014-11-01 (1 days ago)
InstallationMedia: Ubuntu-GNOME 15.04 "Vivid Vervet" - Alpha amd64 (20141031)
MachineType: LENOVO 1066A9U
ProcEnviron:
TERM=xterm
PATH=(custom, no user)
XDG_RUNTIME_DIR=<set>
LANG=en_US.UTF-8
SHELL=/bin/bash
ProcFB: 0 inteldrmfb
ProcKernelCmdLine: BOOT_IMAGE=/vmlinuz-3.16.0-24-generic
root=/dev/mapper/ubuntu--gnome--vg-root ro quiet splash vt.handoff=7
RelatedPackageVersions:
linux-restricted-modules-3.16.0-24-generic N/A
linux-backports-modules-3.16.0-24-generic N/A
linux-firmware 1.138
SourcePackage: linux
UpgradeStatus: No upgrade log present (probably fresh install)
dmi.bios.date: 07/11/2011
dmi.bios.vendor: LENOVO
dmi.bios.version: 44CN36WW
dmi.board.asset.tag: Base Board Asset Tag
dmi.board.name: Emerald Lake
dmi.board.vendor: LENOVO
dmi.board.version: FAB1
dmi.chassis.asset.tag: Asset Tag
dmi.chassis.type: 10
dmi.chassis.vendor: LENOVO
dmi.chassis.version: 0.1
dmi.modalias:
dmi:bvnLENOVO:bvr44CN36WW:bd07/11/2011:svnLENOVO:pn1066A9U:pvrLenovoV570:rvnLENOVO:rnEmeraldLake:rvrFAB1:cvnLENOVO:ct10:cvr0.1:
dmi.product.name: 1066A9U
dmi.product.version: Lenovo V570
dmi.sys.vendor: LENOVO
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