Public bug reported:
I have thinkpad thunderbolt 3 dock gen2 dock I am trying to use with a
New Lenovo Yoga C940 laptop.
- The dock works fine when plugged-in before boot.
- The dock does NOT work when plugged after the system booted.
- The dock does NOT work when plugged-in at boot, subsequently unplugged and
plugged back in.
When it fails, it fails with memory allocation messages such as:
[ 342.507320] pci 0000:2b:00.0: BAR 14: no space for [mem size 0x0c200000]
[ 342.507323] pci 0000:2b:00.0: BAR 14: failed to assign [mem size 0x0c200000]
Things I tried:
- Kernel mainline 5.4.12, same symptoms
- Kernel mainline 5.5.-rc6,
same symptoms.
- Plugging it after powering up the laptop, but at the grub screen before boot.
In this case the dock works fine after boot.
Other potentially useful information to narrow it down:
- The tests were done with only an ethernet cable and power plugged into the
dock to minimize the number of moving parts...
- Dock and laptop both have the very latest firmware as of 2020-01-17.
- The displayport part of the dock always work, but all other ports (USB,
ethernet, card readers fail) when plugged-in after boot.
- Doesn't seem to be a thunderbolt authorization problem:
benoitg@benoitg-Yoga-C940:~$ boltctl
? Lenovo ThinkPad Thunderbolt 3 Dock
?? type: peripheral
?? name: ThinkPad Thunderbolt 3 Dock
?? vendor: Lenovo
?? uuid: 001730c5-7042-0801-ffff-ffffffffffff
?? status: authorized
? ?? domain: c06e823d-af8a-8680-ffff-ffffffffffff
? ?? authflags: none
?? authorized: Sun Jan 19 17:41:04 2020
?? connected: Sun Jan 19 17:41:04 2020
?? stored: Thu Jan 16 07:27:43 2020
?? policy: iommu
?? key: no
ProblemType: Bug
DistroRelease: Ubuntu 19.10
Package: linux-image-5.3.0-26-generic 5.3.0-26.28
ProcVersionSignature: Ubuntu 5.3.0-26.28-generic 5.3.13
Uname: Linux 5.3.0-26-generic x86_64
ApportVersion: 2.20.11-0ubuntu8.2
Architecture: amd64
AudioDevicesInUse:
USER PID ACCESS COMMAND
/dev/snd/controlC0: benoitg 1182 F.... pulseaudio
CurrentDesktop: KDE
Date: Sun Jan 19 12:38:17 2020
InstallationDate: Installed on 2020-01-16 (3 days ago)
InstallationMedia: Kubuntu 19.10 "Eoan Ermine" - Release amd64 (20191017)
MachineType: LENOVO 81Q9
ProcFB: 0 i915drmfb
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-5.3.0-26-generic
root=UUID=078b76d6-6b72-4de4-9e10-f6ea33d9bc1a ro
RelatedPackageVersions:
linux-restricted-modules-5.3.0-26-generic N/A
linux-backports-modules-5.3.0-26-generic N/A
linux-firmware 1.183.3
SourcePackage: linux
UpgradeStatus: No upgrade log present (probably fresh install)
dmi.bios.date: 08/22/2019
dmi.bios.vendor: LENOVO
dmi.bios.version: AUCN45WW
dmi.board.asset.tag: NO Asset Tag
dmi.board.name: LNVNB161216
dmi.board.vendor: LENOVO
dmi.board.version: SDK0J40709 WIN
dmi.chassis.asset.tag: NO Asset Tag
dmi.chassis.type: 31
dmi.chassis.vendor: LENOVO
dmi.chassis.version: Lenovo Yoga C940-14IIL
dmi.modalias:
dmi:bvnLENOVO:bvrAUCN45WW:bd08/22/2019:svnLENOVO:pn81Q9:pvrLenovoYogaC940-14IIL:rvnLENOVO:rnLNVNB161216:rvrSDK0J40709WIN:cvnLENOVO:ct31:cvrLenovoYogaC940-14IIL:
dmi.product.family: Yoga C940-14IIL
dmi.product.name: 81Q9
dmi.product.sku: LENOVO_MT_81Q9_BU_idea_FM_Yoga C940-14IIL
dmi.product.version: Lenovo Yoga C940-14IIL
dmi.sys.vendor: LENOVO
** Affects: linux (Ubuntu)
Importance: Undecided
Status: New
** Tags: amd64 apport-bug eoan
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https://bugs.launchpad.net/bugs/1860284
Title:
thinkpad thunderbolt 3 dock gen2 does not work on Yoga C940 unless
plugged in before boot
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