Public bug reported:
I can reproduce it approx on 2 of 3 trials.
1. Get the brightness up (not minimum) of the internal monitor
2. Have an external monitor plugged in in the VGA cable
3. unplug the external monitor
-> the brightness of the internal monitor is set to minimum
-> the fn keys to change the brightness don't work anymore (you are stuck to
minimum brightness)
workaround:
- replug the external monitor and unplug it again
-> then, you can most of the time, change the internal monitor brightness
through the Fn keys.
ProblemType: Bug
DistroRelease: Ubuntu 14.04
Package: linux-image-3.13.0-12-generic 3.13.0-12.32
ProcVersionSignature: Ubuntu 3.13.0-12.32-generic 3.13.4
Uname: Linux 3.13.0-12-generic x86_64
ApportVersion: 2.13.2-0ubuntu5
Architecture: amd64
AudioDevicesInUse:
USER PID ACCESS COMMAND
/dev/snd/controlC0: didrocks 2685 F.... pulseaudio
CurrentDesktop: Unity
Date: Wed Feb 26 15:11:38 2014
EcryptfsInUse: Yes
HibernationDevice: RESUME=UUID=721253a1-6e55-4181-bc64-506c5987a191
InstallationDate: Installed on 2012-05-28 (639 days ago)
InstallationMedia: Ubuntu 12.04 LTS "Precise Pangolin" - Release amd64
(20120425)
MachineType: LENOVO 4287CTO
ProcFB: 0 inteldrmfb
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.13.0-12-generic
root=UUID=a9f4b475-e4ce-45ed-aa33-9b92e52c49b0 ro quiet splash vt.handoff=7
RelatedPackageVersions:
linux-restricted-modules-3.13.0-12-generic N/A
linux-backports-modules-3.13.0-12-generic N/A
linux-firmware 1.125
SourcePackage: linux
UpgradeStatus: No upgrade log present (probably fresh install)
WifiSyslog:
dmi.bios.date: 02/14/2012
dmi.bios.vendor: LENOVO
dmi.bios.version: 8DET58WW (1.28 )
dmi.board.asset.tag: Not Available
dmi.board.name: 4287CTO
dmi.board.vendor: LENOVO
dmi.board.version: Not Available
dmi.chassis.asset.tag: No Asset Information
dmi.chassis.type: 10
dmi.chassis.vendor: LENOVO
dmi.chassis.version: Not Available
dmi.modalias:
dmi:bvnLENOVO:bvr8DET58WW(1.28):bd02/14/2012:svnLENOVO:pn4287CTO:pvrThinkPadX220:rvnLENOVO:rn4287CTO:rvrNotAvailable:cvnLENOVO:ct10:cvrNotAvailable:
dmi.product.name: 4287CTO
dmi.product.version: ThinkPad X220
dmi.sys.vendor: LENOVO
** Affects: linux (Ubuntu)
Importance: Undecided
Status: New
** Tags: amd64 apport-bug trusty
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You received this bug notification because you are a member of Kernel
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https://bugs.launchpad.net/bugs/1285172
Title:
Display brightness on internal monitor is set to minimum and can't be
changed after plugin out the external monitor.
Status in “linux” package in Ubuntu:
New
Bug description:
I can reproduce it approx on 2 of 3 trials.
1. Get the brightness up (not minimum) of the internal monitor
2. Have an external monitor plugged in in the VGA cable
3. unplug the external monitor
-> the brightness of the internal monitor is set to minimum
-> the fn keys to change the brightness don't work anymore (you are stuck to
minimum brightness)
workaround:
- replug the external monitor and unplug it again
-> then, you can most of the time, change the internal monitor brightness
through the Fn keys.
ProblemType: Bug
DistroRelease: Ubuntu 14.04
Package: linux-image-3.13.0-12-generic 3.13.0-12.32
ProcVersionSignature: Ubuntu 3.13.0-12.32-generic 3.13.4
Uname: Linux 3.13.0-12-generic x86_64
ApportVersion: 2.13.2-0ubuntu5
Architecture: amd64
AudioDevicesInUse:
USER PID ACCESS COMMAND
/dev/snd/controlC0: didrocks 2685 F.... pulseaudio
CurrentDesktop: Unity
Date: Wed Feb 26 15:11:38 2014
EcryptfsInUse: Yes
HibernationDevice: RESUME=UUID=721253a1-6e55-4181-bc64-506c5987a191
InstallationDate: Installed on 2012-05-28 (639 days ago)
InstallationMedia: Ubuntu 12.04 LTS "Precise Pangolin" - Release amd64
(20120425)
MachineType: LENOVO 4287CTO
ProcFB: 0 inteldrmfb
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.13.0-12-generic
root=UUID=a9f4b475-e4ce-45ed-aa33-9b92e52c49b0 ro quiet splash vt.handoff=7
RelatedPackageVersions:
linux-restricted-modules-3.13.0-12-generic N/A
linux-backports-modules-3.13.0-12-generic N/A
linux-firmware 1.125
SourcePackage: linux
UpgradeStatus: No upgrade log present (probably fresh install)
WifiSyslog:
dmi.bios.date: 02/14/2012
dmi.bios.vendor: LENOVO
dmi.bios.version: 8DET58WW (1.28 )
dmi.board.asset.tag: Not Available
dmi.board.name: 4287CTO
dmi.board.vendor: LENOVO
dmi.board.version: Not Available
dmi.chassis.asset.tag: No Asset Information
dmi.chassis.type: 10
dmi.chassis.vendor: LENOVO
dmi.chassis.version: Not Available
dmi.modalias:
dmi:bvnLENOVO:bvr8DET58WW(1.28):bd02/14/2012:svnLENOVO:pn4287CTO:pvrThinkPadX220:rvnLENOVO:rn4287CTO:rvrNotAvailable:cvnLENOVO:ct10:cvrNotAvailable:
dmi.product.name: 4287CTO
dmi.product.version: ThinkPad X220
dmi.sys.vendor: LENOVO
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