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Message #67811
[Bug 1313830] Re: [Lenovo ThinkPad X230] LCD Backlight dims completely when disconnecting external monitor
Yaiza Bailen, thank you for your comment. So your hardware and problem may be tracked, could you please file a new report with Ubuntu by executing the following in a terminal while booted into the default Ubuntu kernel (not a mainline one) via:
ubuntu-bug linux
For more on this, please read the official Ubuntu documentation:
Ubuntu Bug Control and Ubuntu Bug Squad: https://wiki.ubuntu.com/Bugs/BestPractices#X.2BAC8-Reporting.Focus_on_One_Issue
Ubuntu Kernel Team: https://wiki.ubuntu.com/KernelTeam/KernelTeamBugPolicies#Filing_Kernel_Bug_reports
Ubuntu Community: https://help.ubuntu.com/community/ReportingBugs#Bug_reporting_etiquette
When opening up the new report, please feel free to subscribe me to it.
Thank you for your understanding.
Helpful bug reporting tips:
https://wiki.ubuntu.com/ReportingBugs
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https://bugs.launchpad.net/bugs/1313830
Title:
[Lenovo ThinkPad X230] LCD Backlight dims completely when
disconnecting external monitor
Status in “linux” package in Ubuntu:
Fix Released
Status in “linux” source package in Trusty:
Confirmed
Bug description:
After undocking with external DVI monitor connected to dock the
laptop's internal LCD dims all the way (backlight still on, but as dim
as it goes). Keyboard backlight controls cause OSD indicator to show
backlight changing but no affect on LCD brightness.
Issue also reported for RedHat here:
https://bugzilla.redhat.com/show_bug.cgi?id=1067071
ProblemType: Bug
DistroRelease: Ubuntu 14.04
Package: linux-image-3.13.0-24-generic 3.13.0-24.46
ProcVersionSignature: Ubuntu 3.13.0-24.46-generic 3.13.9
Uname: Linux 3.13.0-24-generic x86_64
ApportVersion: 2.14.1-0ubuntu3
Architecture: amd64
AudioDevicesInUse:
USER PID ACCESS COMMAND
/dev/snd/controlC0: dustin 2683 F.... pulseaudio
CurrentDesktop: Unity
Date: Mon Apr 28 10:13:42 2014
EcryptfsInUse: Yes
HibernationDevice: RESUME=UUID=79c0f3ac-bda7-4a28-9ae1-6bb19ab0fd0d
InstallationDate: Installed on 2013-10-08 (201 days ago)
InstallationMedia: Ubuntu 13.10 "Saucy Salamander" - Beta amd64 (20130925.1)
MachineType: LENOVO 2306CTO
ProcFB: 0 inteldrmfb
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.13.0-24-generic.efi.signed root=UUID=2f1bbe89-ca2f-4884-8fc6-8a476dd1a475 ro
RelatedPackageVersions:
linux-restricted-modules-3.13.0-24-generic N/A
linux-backports-modules-3.13.0-24-generic N/A
linux-firmware 1.127
SourcePackage: linux
UpgradeStatus: Upgraded to trusty on 2014-01-08 (109 days ago)
dmi.bios.date: 03/05/2013
dmi.bios.vendor: LENOVO
dmi.bios.version: G2ETA0WW (2.60 )
dmi.board.asset.tag: Not Available
dmi.board.name: 2306CTO
dmi.board.vendor: LENOVO
dmi.board.version: Not Defined
dmi.chassis.asset.tag: No Asset Information
dmi.chassis.type: 10
dmi.chassis.vendor: LENOVO
dmi.chassis.version: Not Available
dmi.modalias: dmi:bvnLENOVO:bvrG2ETA0WW(2.60):bd03/05/2013:svnLENOVO:pn2306CTO:pvrThinkPadX230:rvnLENOVO:rn2306CTO:rvrNotDefined:cvnLENOVO:ct10:cvrNotAvailable:
dmi.product.name: 2306CTO
dmi.product.version: ThinkPad X230
dmi.sys.vendor: LENOVO
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References