Anmar Oueja, as per http://download.lenovo.com/express/ddfm.html an update is
available for your BIOS (2.59). If you update to this following
https://help.ubuntu.com/community/BiosUpdate , does it change anything? If it
doesn't, could you please both specify what happened, and just provide the
output of the following terminal command:
sudo dmidecode -s bios-version sudo dmidecode -s bios-release-date
Please note your current BIOS is already in the Bug Description, so
posting this on the old BIOS would not be helpful.
For more on BIOS updates and linux, please see
https://help.ubuntu.com/community/ReportingBugs#Bug_reporting_etiquette
.
Thank you for your understanding.
** Summary changed:
- brightness stepping is incorrect (double what it should be)
+ 8086:0166 [Lenovo ThinkPad X1 Carbon] Brightness stepping is incorrect
(double what it should be)
** Tags added: bios-outdated-2.59
** Changed in: linux (Ubuntu)
Importance: Medium = Low
** Changed in: linux (Ubuntu)
Status: Expired = Incomplete
** Attachment removed: Screenshot from 2013-09-27 01:44:43.png
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1221795/+attachment/3843507/+files/Screenshot%20from%202013-09-27%2001%3A44%3A43.png
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https://bugs.launchpad.net/bugs/1221795
Title:
8086:0166 [Lenovo ThinkPad X1 Carbon] Brightness stepping is incorrect
(double what it should be)
Status in “linux” package in Ubuntu:
Incomplete
Bug description:
Problem: When I press the laptop screen brighteness, each step yield
an event that is displayed on the OSD but the screen brightness
doesn't change until the third press. Same happens for decreasing or
increasing the brightness.
Exepcted behaviour: Each press of the brightness button on the laptop,
yield a visible change in the brightness of the LCD scree.
Workaround: This seems documented and works perfectly. The work around
is to type this in terminal:
sudo sh -c 'echo -n 0
/sys/module/video/parameters/brightness_switch_enabled'
More details are here: http://askubuntu.com/questions/173921/why-does-
my-thinkpad-brightness-control-skip-steps
I think this should be fixed in 13.10.
ProblemType: Bug
DistroRelease: Ubuntu 13.10
Package: linux-image-3.11.0-4-generic 3.11.0-4.9
ProcVersionSignature: Ubuntu 3.11.0-4.9-generic 3.11.0-rc7
Uname: Linux 3.11.0-4-generic x86_64
ApportVersion: 2.12.1-0ubuntu3
Architecture: amd64
AudioDevicesInUse:
USERPID ACCESS COMMAND
/dev/snd/controlC0: anmar 1798 F pulseaudio
Date: Fri Sep 6 11:23:20 2013
HibernationDevice: RESUME=UUID=2e39ee55-2a87-4298-a2d0-1c8ef5de5a96
InstallationDate: Installed on 2013-08-09 (27 days ago)
InstallationMedia: Ubuntu 13.10 Saucy Salamander - Alpha amd64 (20130809)
MachineType: LENOVO 3443CTO
MarkForUpload: True
ProcFB: 0 inteldrmfb
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.11.0-4-generic.efi.signed
root=UUID=1784df7c-8b5f-4550-84f2-13e73c2915fe ro quiet splash vt.handoff=7
RelatedPackageVersions:
linux-restricted-modules-3.11.0-4-generic N/A
linux-backports-modules-3.11.0-4-generic N/A
linux-firmware1.113
SourcePackage: linux
UpgradeStatus: No upgrade log present (probably fresh install)
dmi.bios.date: 04/29/2013
dmi.bios.vendor: LENOVO
dmi.bios.version: G6ET96WW (2.56 )
dmi.board.asset.tag: Not Available
dmi.board.name: 3443CTO
dmi.board.vendor: LENOVO
dmi.board.version: Win8 STD DPK TPG
dmi.chassis.asset.tag: No Asset Information
dmi.chassis.type: 10
dmi.chassis.vendor: LENOVO
dmi.chassis.version: Not Available
dmi.modalias:
dmi:bvnLENOVO:bvrG6ET96WW(2.56):bd04/29/2013:svnLENOVO:pn3443CTO:pvrThinkPadX1Carbon:rvnLENOVO:rn3443CTO:rvrWin8STDDPKTPG:cvnLENOVO:ct10:cvrNotAvailable:
dmi.product.name: 3443CTO
dmi.product.version: ThinkPad X1 Carbon
dmi.sys.vendor: LENOVO
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