We are trying to determine if this bug is related to bug #1819924. With the affected kernel versions, does the hang still occur if the dock is connected before booting?
That is, with your computer shut off, plug in the dock and then boot up. Does the computer hang after booting? If not, are you then able to hot-plug (disconnect and re-connect) without issue? -- 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/1820811 Title: Thunderbolt3 dock freezes X on hotplug when used with external displays Status in linux package in Ubuntu: Confirmed Bug description: This bug is very similar to https://bugs.launchpad.net/dell-sputnik/+bug/1752165 and has the same steps to reproduce, but it's not related to nvidia drivers. I have Lenovo Thinkpad T480s connected to a ThinkPad Thunderbolt 3 Dock. I have installed 4.15.0.46, 4.18.0.16 kernel. Both of these kernels have the issue. I followed this comment https://bugs.launchpad.net/dell-sputnik/+bug/1752165/comments/41 and installed 4.20.6 from UKUU and the issue is gone. --- ProblemType: Bug ApportVersion: 2.20.9-0ubuntu7.6 Architecture: amd64 AudioDevicesInUse: USER PID ACCESS COMMAND /dev/snd/controlC0: dmisharo 2223 F.... pulseaudio /dev/snd/pcmC0D0p: dmisharo 2223 F...m pulseaudio /dev/snd/controlC1: dmisharo 2223 F.... pulseaudio CurrentDesktop: KDE DistroRelease: KDE neon 18.04 HibernationDevice: RESUME=UUID=611a9c7d-fcaa-4717-b1d2-d89edca7e661 InstallationDate: Installed on 2018-11-25 (114 days ago) InstallationMedia: neon user "Bionic" - Build amd64 LIVE Binary 20181122-05:40 MachineType: LENOVO 20L8S2N80E Package: linux (not installed) ProcFB: 0 inteldrmfb ProcKernelCmdLine: BOOT_IMAGE=/vmlinuz-4.18.0-16-generic root=/dev/mapper/neon--vg-root ro quiet splash vt.handoff=1 ProcVersionSignature: Ubuntu 4.18.0-16.17~18.04.1-generic 4.18.20 RelatedPackageVersions: linux-restricted-modules-4.18.0-16-generic N/A linux-backports-modules-4.18.0-16-generic N/A linux-firmware 1.173.3 Tags: bionic Uname: Linux 4.18.0-16-generic x86_64 UpgradeStatus: No upgrade log present (probably fresh install) UserGroups: adm cdrom dip docker lpadmin plugdev sambashare sudo _MarkForUpload: True dmi.bios.date: 07/18/2018 dmi.bios.vendor: LENOVO dmi.bios.version: N22ET48W (1.25 ) dmi.board.asset.tag: Not Available dmi.board.name: 20L8S2N80E dmi.board.vendor: LENOVO dmi.board.version: Not Defined dmi.chassis.asset.tag: RH0023049 dmi.chassis.type: 10 dmi.chassis.vendor: LENOVO dmi.chassis.version: None dmi.modalias: dmi:bvnLENOVO:bvrN22ET48W(1.25):bd07/18/2018:svnLENOVO:pn20L8S2N80E:pvrThinkPadT480s:rvnLENOVO:rn20L8S2N80E:rvrNotDefined:cvnLENOVO:ct10:cvrNone: dmi.product.family: ThinkPad T480s dmi.product.name: 20L8S2N80E dmi.product.sku: LENOVO_MT_20L8_BU_Think_FM_ThinkPad T480s dmi.product.version: ThinkPad T480s dmi.sys.vendor: LENOVO To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1820811/+subscriptions -- Mailing list: https://launchpad.net/~kernel-packages Post to : kernel-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~kernel-packages More help : https://help.launchpad.net/ListHelp
