Public bug reported:
I have a Lenovo X1 Carbon (4th gen) and using the Lenovo one-link+ docking
station. The laptop is connected through the docking station to 2 external
monitors when docked. When undocking the laptop, the laptop does not detect
that the monitors have been disconnected (leaving X in a somewhat unworkable
state). Even worse, when undocking with thelid closed (which would previously
have resulted in suspend) the laptop now starts working hard and the fan starts
spinning up (which is particularly bad when forgetting about this and placing
the laptop in a bag). The laptop also becomes very unresponsive to X actions,
e.g. xrandr --query takes a a couple of seconds, switching to the console takes
> 10s.
This seems to be related to the following Fedora bug:
https://bugzilla.redhat.com/show_bug.cgi?id=1392885
which reports almost identical issues. I have not been able to try a new kernel
yet to see if issues are fixed.
ProblemType: Bug
DistroRelease: Ubuntu 16.10
Package: linux-image-4.8.0-30-generic 4.8.0-30.32
ProcVersionSignature: Ubuntu 4.8.0-30.32-generic 4.8.6
Uname: Linux 4.8.0-30-generic x86_64
ApportVersion: 2.20.3-0ubuntu8.2
Architecture: amd64
AudioDevicesInUse:
USER PID ACCESS COMMAND
/dev/snd/controlC0: jschrod 2726 F.... pulseaudio
CurrentDesktop: Unity
Date: Tue Jan 10 21:28:42 2017
HibernationDevice: RESUME=UUID=de3940cc-d877-44b6-9b33-16a8abd6701c
InstallationDate: Installed on 2016-10-01 (101 days ago)
InstallationMedia: Ubuntu 16.10 "Yakkety Yak" - Alpha amd64 (20160922)
Lsusb:
Bus 002 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub
Bus 001 Device 003: ID 13d3:5248 IMC Networks
Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
MachineType: LENOVO 20FB006AMS
ProcFB: 0 inteldrmfb
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-4.8.0-30-generic.efi.signed
root=UUID=a43e313c-5c49-4859-a1aa-4446f2b9c455 ro quiet splash
RelatedPackageVersions:
linux-restricted-modules-4.8.0-30-generic N/A
linux-backports-modules-4.8.0-30-generic N/A
linux-firmware 1.161.1
SourcePackage: linux
UpgradeStatus: No upgrade log present (probably fresh install)
dmi.bios.date: 08/02/2016
dmi.bios.vendor: LENOVO
dmi.bios.version: N1FET43W (1.17 )
dmi.board.asset.tag: Not Available
dmi.board.name: 20FB006AMS
dmi.board.vendor: LENOVO
dmi.board.version: SDK0J40697 WIN
dmi.chassis.asset.tag: No Asset Information
dmi.chassis.type: 10
dmi.chassis.vendor: LENOVO
dmi.chassis.version: None
dmi.modalias:
dmi:bvnLENOVO:bvrN1FET43W(1.17):bd08/02/2016:svnLENOVO:pn20FB006AMS:pvrThinkPadX1Carbon4th:rvnLENOVO:rn20FB006AMS:rvrSDK0J40697WIN:cvnLENOVO:ct10:cvrNone:
dmi.product.name: 20FB006AMS
dmi.product.version: ThinkPad X1 Carbon 4th
dmi.sys.vendor: LENOVO
** Affects: linux (Ubuntu)
Importance: Undecided
Status: New
** Tags: amd64 apport-bug yakkety
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https://bugs.launchpad.net/bugs/1655450
Title:
monitors not disconnected after undocking
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