dock not recognized once reconnected

[udippel]

With my lenovo Helix 2, and in 20.04, when I remove the tablet part (it is a convertible), control is properly passed to the tablet part.
However, I plug it back into the keyboard dock, this dock is not recognized. So neither keys nor touchpad get re-activated. Logout-Login doesn't solve the problem. Only a full reboot makes the keyboard and built-in touchpad come back.
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ProblemType: Bug
ApportVersion: 2.20.11-0ubuntu27.9
Architecture: amd64
AudioDevicesInUse:
 USER PID ACCESS COMMAND
 /dev/snd/controlC1: udippel 1576 F.... pulseaudio
 /dev/snd/controlC0: udippel 1576 F.... pulseaudio
CasperMD5CheckResult: skip
CurrentDesktop: KDE
DistroRelease: Ubuntu 20.04
HibernationDevice: RESUME=UUID=9eb1d50f-cb20-4f4a-a8e4-a40efb1886da
InstallationDate: Installed on 2019-03-14 (573 days ago)
InstallationMedia: Kubuntu 18.04.1 LTS "Bionic Beaver" - Release amd64 (20180725)
MachineType: LENOVO 20CHS1KL00
Package: linux (not installed)
ProcFB: 0 i915drmfb
ProcKernelCmdLine: BOOT_IMAGE=/vmlinuz-5.4.0-48-generic root=UUID=c447507e-03aa-44a0-bb04-99c05ae1354b ro quiet splash vt.handoff=7
ProcVersionSignature: Ubuntu 5.4.0-48.52-generic 5.4.60
RelatedPackageVersions:
 linux-restricted-modules-5.4.0-48-generic N/A
 linux-backports-modules-5.4.0-48-generic N/A
 linux-firmware 1.187.3
Tags: focal
Uname: Linux 5.4.0-48-generic x86_64
UpgradeStatus: Upgraded to focal on 2020-09-29 (7 days ago)
UserGroups: adm cdrom dip lpadmin plugdev sambashare sudo
_MarkForUpload: True
dmi.bios.date: 03/24/2020
dmi.bios.vendor: LENOVO
dmi.bios.version: N17ETB2W (2.12 )
dmi.board.asset.tag: Not Available
dmi.board.name: 20CHS1KL00
dmi.board.vendor: LENOVO
dmi.board.version: SDK0E50510 WIN
dmi.chassis.asset.tag: BT-56-001476
dmi.chassis.type: 11
dmi.chassis.vendor: LENOVO
dmi.chassis.version: None
dmi.modalias: dmi:bvnLENOVO:bvrN17ETB2W(2.12):bd03/24/2020:svnLENOVO:pn20CHS1KL00:pvrThinkPadHelix2nd:rvnLENOVO:rn20CHS1KL00:rvrSDK0E50510WIN:cvnLENOVO:ct11:cvrNone:
dmi.product.family: ThinkPad Helix 2nd
dmi.product.name: 20CHS1KL00
dmi.product.sku: LENOVO_MT_20CH_BU_Think_FM_ThinkPad Helix 2nd
dmi.product.version: ThinkPad Helix 2nd
dmi.sys.vendor: LENOVO

[Paul White (paulw2u)]

Thank you for taking the time to report this bug and helping to make Ubuntu better.

This bug did not have a package associated with it, which is important for ensuring that it gets looked at by the proper developers. You can learn more about finding the right package at https://wiki.ubuntu.com/Bugs/FindRightPackage. I have classified this bug as a bug in 'linux' due to the hardware issues that you are experiencing.

When reporting bugs in the future please use apport by using 'ubuntu-bug' and the name of the package affected. You can learn more about this functionality at https://help.ubuntu.com/community/ReportingBugs.

[Ubuntu Kernel Bot (ubuntu-kernel-bot)]

This bug is missing log files that will aid in diagnosing the problem. While running an Ubuntu kernel (not a mainline or third-party kernel) please enter the following command in a terminal window:

apport-collect 1898908

and then change the status of the bug to 'Confirmed'.

If, due to the nature of the issue you have encountered, you are unable to run this command, please add a comment stating that fact and change the bug status to 'Confirmed'.

This change has been made by an automated script, maintained by the Ubuntu Kernel Team.

[udippel (udippel)]

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[Paul White (paulw2u)]

Changing status to 'Confirmed' as requested in comment #2.