kernel-packages team mailing list archive
-
kernel-packages team
-
Mailing list archive
-
Message #182186
[Bug 1568573] Re: [Lenovo Thinkpad T460] Ultra Dock external displays not detected after suspend/resume cycle
The 4.7-rc1 kernel was not bootable on my system. However, I have been
testing with 4.6.0-996-generic #201605082201 from drm-next and the
behavior is better. With the drm-next kernel, I am able to dock/undock
the laptop multiple times without a freeze and the displays are
recognized and can be setup. The configured display layout is applied
successfully on docking, unlike with the 4.4.0-22 kernel. I do have one
persistent issue with the drm-next kernel, I have to change to a VT and
back to get display output after docking - but I don't think its related
to this issue. This intel stuff sure seems like a mess.
--
You received this bug notification because you are a member of Kernel
Packages, which is subscribed to linux in Ubuntu.
https://bugs.launchpad.net/bugs/1568573
Title:
[Lenovo Thinkpad T460] Ultra Dock external displays not detected after
suspend/resume cycle
Status in linux package in Ubuntu:
Incomplete
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/connected. If I
disconnect the displays from the dock and connect them directly to the
laptop, they are initialized successfully and can be configured via
xrandr etc.
If the laptop is power cycled, the displays can be used normally until
the next suspend-resume cycle.
Example from relevant dmesg:
[drm:intel_dp_link_training_clock_recovery [i915_bpo]] *ERROR* too many voltage retries, give up
[drm:intel_dp_link_training_clock_recovery [i915_bpo]] *ERROR* too many voltage retries, give up
[drm:intel_dp_link_training_clock_recovery [i915_bpo]] *ERROR* too many voltage retries, give up
[drm:intel_dp_start_link_train [i915_bpo]] *ERROR* failed to train DP, aborting
[drm:intel_dp_set_idle_link_train [i915_bpo]] *ERROR* Timed out waiting for DP idle patterns
[drm:intel_dp_link_training_clock_recovery [i915_bpo]] *ERROR* too many voltage retries, give up
[drm:intel_dp_link_training_clock_recovery [i915_bpo]] *ERROR* too many voltage retries, give up
[drm:intel_dp_link_training_clock_recovery [i915_bpo]] *ERROR* too many voltage retries, give up
ProblemType: Bug
DistroRelease: Ubuntu 16.04
Package: linux-image-4.4.0-18-generic 4.4.0-18.34
ProcVersionSignature: Ubuntu 4.4.0-18.34-generic 4.4.6
Uname: Linux 4.4.0-18-generic x86_64
ApportVersion: 2.20.1-0ubuntu1
Architecture: amd64
AudioDevicesInUse:
USER PID ACCESS COMMAND
/dev/snd/controlC0: ryan 1838 F.... pulseaudio
Date: Sun Apr 10 09:39:32 2016
HibernationDevice: RESUME=UUID=04e04e17-3976-4daa-a1dd-2dd369aee83d
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=/vmlinuz-4.4.0-18-generic root=/dev/mapper/it--vg-root ro quiet
PulseList: Error: command ['pacmd', 'list'] failed with exit code 1: No PulseAudio daemon running, or not running as session daemon.
RelatedPackageVersions:
linux-restricted-modules-4.4.0-18-generic N/A
linux-backports-modules-4.4.0-18-generic N/A
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.asset.tag: Not Available
dmi.board.name: 20FNCTO1WW
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:bvrR06ET35W(1.09):bd03/09/2016:svnLENOVO:pn20FNCTO1WW:pvrThinkPadT460:rvnLENOVO:rn20FNCTO1WW:rvrSDK0J40697WIN:cvnLENOVO:ct10:cvrNone:
dmi.product.name: 20FNCTO1WW
dmi.product.version: ThinkPad T460
dmi.sys.vendor: LENOVO
To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1568573/+subscriptions
References