[Lenovo Thinkpad T460] Ultra Dock external displays not detected after suspend/resume cycle
Affects | Status | Importance | Assigned to | Milestone | |
---|---|---|---|---|---|
linux (Ubuntu) |
Expired
|
Medium
|
Unassigned |
Bug Description
Hello,
System is Thinkpad T460, Skylake graphics, Thinkpad Ultra dock. DVI and HDMI displays connected via dock. 4.4.0-18.
After a suspend-resume cycle, when the laptop is docked the dock connected external displays are not initialized/
If the laptop is power cycled, the displays can be used normally until the next suspend-resume cycle.
Example from relevant dmesg:
[drm:intel_
[drm:intel_
[drm:intel_
[drm:intel_
[drm:intel_
[drm:intel_
[drm:intel_
[drm:intel_
ProblemType: Bug
DistroRelease: Ubuntu 16.04
Package: linux-image-
ProcVersionSign
Uname: Linux 4.4.0-18-generic x86_64
ApportVersion: 2.20.1-0ubuntu1
Architecture: amd64
AudioDevicesInUse:
USER PID ACCESS COMMAND
/dev/snd/
Date: Sun Apr 10 09:39:32 2016
HibernationDevice: RESUME=
InstallationDate: Installed on 2015-09-21 (201 days ago)
InstallationMedia: It
Lsusb:
Bus 002 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub
Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
MachineType: LENOVO 20FNCTO1WW
ProcEnviron:
TERM=xterm
PATH=(custom, no user)
LANG=en_US.UTF-8
SHELL=/bin/bash
ProcFB: 0 inteldrmfb
ProcKernelCmdLine: BOOT_IMAGE=
PulseList: Error: command ['pacmd', 'list'] failed with exit code 1: No PulseAudio daemon running, or not running as session daemon.
RelatedPackageV
linux-
linux-
linux-firmware 1.157
SourcePackage: linux
UpgradeStatus: Upgraded to xenial on 2016-02-24 (45 days ago)
dmi.bios.date: 03/09/2016
dmi.bios.vendor: LENOVO
dmi.bios.version: R06ET35W (1.09 )
dmi.board.
dmi.board.name: 20FNCTO1WW
dmi.board.vendor: LENOVO
dmi.board.version: SDK0J40697 WIN
dmi.chassis.
dmi.chassis.type: 10
dmi.chassis.vendor: LENOVO
dmi.chassis.
dmi.modalias: dmi:bvnLENOVO:
dmi.product.name: 20FNCTO1WW
dmi.product.
dmi.sys.vendor: LENOVO
Changed in linux (Ubuntu): | |
importance: | Undecided → High |
tags: | added: bios-outdated-1.10 |
Changed in linux (Ubuntu): | |
importance: | High → Medium |
status: | Confirmed → Incomplete |
summary: |
- i915 Skylake - Ultra Dock external displays not detected after + [Lenovo Thinkpad T460] Ultra Dock external displays not detected after suspend/resume cycle |
tags: | added: needs-test-4.7-rc6 |
tags: |
added: bios-outdated-1.13 needs-test-4.8-rc3 removed: latest-bios-1.10 needs-test-4.7-rc6 |
This change was made by a bot.