Public bug reported: The bug is identical to the expired https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1568573 where a new report was requested.
This time around with a fresh install of 16.10 amd64 on a Thinkpad T460p and a Lenovo Ultra Dock with two external monitors. The setup does work when freshly booting with the laptop on the dock. Suspending undocked, docking, resuming doesn't light up the external monitors. Neither does just docking awake. The relevant error messages seem to be these: Dec 20 13:21:50 talas kernel: [265391.482117] [drm:intel_dp_link_training_clock_recovery [i915]] *ERROR* too many voltage retries, give up Dec 20 13:21:50 talas kernel: [265391.498583] [drm:intel_wait_ddi_buf_idle [i915]] *ERROR* Timeout waiting for DDI BUF D idle bit Other relevant bug reports might be: https://bugzilla.redhat.com/show_bug.cgi?id=1316877 https://bbs.archlinux.org/viewtopic.php?id=209791 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: donjan 2341 F.... pulseaudio /dev/snd/pcmC1D0p: donjan 2341 F...m pulseaudio /dev/snd/controlC1: donjan 2341 F.... pulseaudio CurrentDesktop: GNOME-Flashback:Unity Date: Tue Dec 20 15:36:08 2016 InstallationDate: Installed on 2016-10-25 (56 days ago) InstallationMedia: Ubuntu 16.10 "Yakkety Yak" - Release amd64 (20161012.2) MachineType: LENOVO 20FXS0Y200 ProcFB: 0 inteldrmfb ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-4.8.0-30-generic root=UUID=104820cc-7d87-46d1-a1aa-e650ff221603 ro quiet splash vt.handoff=7 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 SourcePackage: linux UpgradeStatus: No upgrade log present (probably fresh install) dmi.bios.date: 09/26/2016 dmi.bios.vendor: LENOVO dmi.bios.version: R07ET71W (2.11 ) dmi.board.asset.tag: Not Available dmi.board.name: 20FXS0Y200 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: None dmi.modalias: dmi:bvnLENOVO:bvrR07ET71W(2.11):bd09/26/2016:svnLENOVO:pn20FXS0Y200:pvrThinkPadT460p:rvnLENOVO:rn20FXS0Y200:rvrNotDefined:cvnLENOVO:ct10:cvrNone: dmi.product.name: 20FXS0Y200 dmi.product.version: ThinkPad T460p dmi.sys.vendor: LENOVO ** Affects: linux (Ubuntu) Importance: Undecided Status: New ** Tags: amd64 apport-bug yakkety -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1651454 Title: [Lenovo Thinkpad T460p] Ultra Dock external displays not detected after suspend/resume cycle To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1651454/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
