Florent Flament, could you please test the latest upstream kernel available
from the very top line at the top of the page (not the daily folder) 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. For
example:
kernel-fixed-upstream-3.16-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. As well, please
remove the tag:
needs-upstream-testing
If the mainline kernel does not fix this bug, please add the following tags:
kernel-bug-exists-upstream
kernel-bug-exists-upstream-VERSION-NUMBER
As well, please remove the tag:
needs-upstream-testing
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.
** Summary changed:
- Backlight control does not work, but there are entries in
/sys/class/backlight - Toshiba Satellite Z930-164
+ [Toshiba Satellite Z930-164] Backlight control does not work, but there are
entries in /sys/class/backlight
** Changed in: linux (Ubuntu)
Importance: Undecided => Low
** Changed in: linux (Ubuntu)
Status: Confirmed => Incomplete
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https://bugs.launchpad.net/bugs/1335458
Title:
[Toshiba Satellite Z930-164] Backlight control does not work, but
there are entries in /sys/class/backlight
Status in “linux” package in Ubuntu:
Incomplete
Bug description:
Following bug reporting process:
https://wiki.ubuntu.com/Kernel/Debugging/Backlight#Reporting_Backlight_Bugs
Running Ubuntu 14.04 with Unity.
Testing for a work around:
* With kernel parameter acpi_backlight=vendor
-> Brightness control is working with both applet and hotkeys.
- # echo 8 > /sys/class/backlight/intel_backlight/brightness
-> The command sets the screens brightness very low (almost turns
it off).
* With kernel parameter video.use_bios_initial_backlight=0
-> Brightness control is neither working with applet nor hotkeys.
* With kernel parameter video.use_native_backlight=1
-> Brightness control is working with both applet and hotkeys.
ProblemType: Bug
DistroRelease: Ubuntu 14.04
Package: linux-image-3.13.0-30-generic 3.13.0-30.54
ProcVersionSignature: Ubuntu 3.13.0-30.54-generic 3.13.11.2
Uname: Linux 3.13.0-30-generic x86_64
ApportVersion: 2.14.1-0ubuntu3.2
Architecture: amd64
AudioDevicesInUse:
USER PID ACCESS COMMAND
/dev/snd/controlC0: florent 2107 F.... pulseaudio
CurrentDesktop: Unity
Date: Sat Jun 28 18:17:42 2014
EcryptfsInUse: Yes
HibernationDevice: RESUME=/dev/mapper/toshnux--vg-swap_1
MachineType: TOSHIBA SATELLITE Z930
ProcFB: 0 inteldrmfb
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.13.0-30-generic
root=/dev/mapper/hostname--vg-root ro splash quiet acpi_backlight=vendor
vt.handoff=7
RelatedPackageVersions:
linux-restricted-modules-3.13.0-30-generic N/A
linux-backports-modules-3.13.0-30-generic N/A
linux-firmware 1.127.4
SourcePackage: linux
UpgradeStatus: No upgrade log present (probably fresh install)
dmi.bios.date: 04/04/2013
dmi.bios.vendor: TOSHIBA
dmi.bios.version: Version 6.70
dmi.board.asset.tag: 0000000000
dmi.board.name: SATELLITE Z930
dmi.board.vendor: TOSHIBA
dmi.board.version: Version A0
dmi.chassis.asset.tag: 0000000000
dmi.chassis.type: 10
dmi.chassis.vendor: TOSHIBA
dmi.chassis.version: Version 1.0
dmi.modalias:
dmi:bvnTOSHIBA:bvrVersion6.70:bd04/04/2013:svnTOSHIBA:pnSATELLITEZ930:pvrPT23LE-01900EFR:rvnTOSHIBA:rnSATELLITEZ930:rvrVersionA0:cvnTOSHIBA:ct10:cvrVersion1.0:
dmi.product.name: SATELLITE Z930
dmi.product.version: PT23LE-01900EFR
dmi.sys.vendor: TOSHIBA
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