*** This bug is a duplicate of bug 1970495 ***
https://bugs.launchpad.net/bugs/1970495
Ubuntu 21.04 is no longer supported but we are tracking the same issue
in bug 1970495 still.
** This bug has been marked a duplicate of bug 1970495
Window manager freezes when plugging in USB-C dock with external monitor
([drm] *ERROR* mstb 00000000f21f0a30 port 1: DPCD read on addr 0x4b0 for 1
bytes NAKed)
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https://bugs.launchpad.net/bugs/1926809
Title:
WD19 dock stops working in Ubuntu 21.04
Status in linux package in Ubuntu:
Confirmed
Bug description:
This morning I upgraded to Kubuntu 21.04.
I use two external monitors connected to my Dell XPS laptop via a Dell
WD19 dock.
Post-upgrade the monitors and also network functionality through the
dock appear to have completely stopped functioning.
When the dock is plugged in and the computer is booted the monitors do not
enable.
When the dock is not plugged in the computer boots normally.
When I look at the dmesg output there appears to be some notable
errors when I plug the dock in:
[ 516.173451] xhci_hcd 0000:39:00.0: xHCI host controller not responding,
assume dead
[ 516.207480] xhci_hcd 0000:39:00.0: HC died; cleaning up
[ 521.313422] pcieport 0000:02:00.0: can't change power state from D3cold to
D0 (config space inaccessible)
[ 555.140320] xhci_hcd 0000:39:00.0: xHCI host controller not responding,
assume dead
[ 555.140343] xhci_hcd 0000:39:00.0: HC died; cleaning up
[ 560.291086] pcieport 0000:02:00.0: can't change power state from D3cold to
D0 (config space inaccessible)
[ 850.385934] [drm:drm_dp_send_dpcd_read [drm_kms_helper]] *ERROR* mstb
00000000eaa106e4 port 1: DPCD read on addr 0x4b0 for 1 bytes NAKed
[ 850.499763] [drm:drm_dp_send_dpcd_read [drm_kms_helper]] *ERROR* mstb
00000000eaa106e4 port 3: DPCD read on addr 0x4b0 for 1 bytes NAKed
[ 851.717630] i915 0000:00:02.0: [drm] *ERROR* Link Training Unsuccessful
[ 851.815190] i915 0000:00:02.0: [drm] *ERROR* Link Training Unsuccessful
[ 856.231021] [drm:drm_dp_send_dpcd_read [drm_kms_helper]] *ERROR* mstb
00000000eaa106e4 port 1: DPCD read on addr 0x4b0 for 1 bytes NAKed
[ 856.301269] [drm:drm_dp_send_dpcd_read [drm_kms_helper]] *ERROR* mstb
00000000eaa106e4 port 3: DPCD read on addr 0x4b0 for 1 bytes NAKed
[ 856.320487] i915 0000:00:02.0: [drm] *ERROR* Link Training Unsuccessful
[ 856.343208] i915 0000:00:02.0: [drm] *ERROR* CPU pipe B FIFO underrun
[ 856.382831] i915 0000:00:02.0: [drm] *ERROR* Link Training Unsuccessful
[ 860.704920] i915 0000:00:02.0: [drm] *ERROR* Link Training Unsuccessful
[ 860.765138] i915 0000:00:02.0: [drm] *ERROR* Link Training Unsuccessful
[ 860.894454] i915 0000:00:02.0: [drm] *ERROR* Link Training Unsuccessful
[ 860.965337] i915 0000:00:02.0: [drm] *ERROR* Link Training Unsuccessful
[ 861.115198] i915 0000:00:02.0: [drm] *ERROR* Link Training Unsuccessful
[ 861.182111] i915 0000:00:02.0: [drm] *ERROR* Link Training Unsuccessful
[ 866.232326] [drm:drm_dp_send_dpcd_read [drm_kms_helper]] *ERROR* mstb
00000000eaa106e4 port 1: DPCD read on addr 0x4b0 for 1 bytes NAKed
[ 866.351715] i915 0000:00:02.0: [drm] *ERROR* Link Training Unsuccessful
[ 866.454536] [drm:drm_dp_send_dpcd_read [drm_kms_helper]] *ERROR* mstb
00000000eaa106e4 port 3: DPCD read on addr 0x4b0 for 1 bytes NAKed
[ 866.473097] i915 0000:00:02.0: [drm] *ERROR* Link Training Unsuccessful
[ 866.534697] i915 0000:00:02.0: [drm] *ERROR* Link Training Unsuccessful
With the dock plugged in:
* neither monitor displays although they are present under display
configuration
* since my laptop screen is not usually on if both monitors are present on
the dock the immediate result was no display at all under the dock was detached
* network connectivity is not established although the network device appears
under networks
Unfortunately I lack the skills to diagnose this further without
assistance or to install a more recent kernel to see if it is resolved
there.
It appears that communications between the laptop and the Dock are not
going well to my eyes (is this what link training is on Thunderbolt)
I'm happy to provide further information... although in a few days the
lack of Dock and monitors will be a bit of an issue and I may have to
roll something back.
ProblemType: Bug
DistroRelease: Ubuntu 21.04
Package: linux-image-5.11.0-16-generic 5.11.0-16.17
ProcVersionSignature: Ubuntu 5.11.0-16.17-generic 5.11.12
Uname: Linux 5.11.0-16-generic x86_64
ApportVersion: 2.20.11-0ubuntu65
Architecture: amd64
AudioDevicesInUse:
USER PID ACCESS COMMAND
/dev/snd/controlC2: mulhollandd 1940 F.... pulseaudio
/dev/snd/controlC1: mulhollandd 1940 F.... pulseaudio
/dev/snd/controlC0: mulhollandd 1940 F.... pulseaudio
CasperMD5CheckResult: unknown
CurrentDesktop: KDE
Date: Sat May 1 08:57:26 2021
InstallationDate: Installed on 2020-06-13 (321 days ago)
InstallationMedia: Kubuntu 20.04 LTS "Focal Fossa" - Release amd64 (20200423)
MachineType: Dell Inc. XPS 13 9360
ProcFB: 0 i915drmfb
ProcKernelCmdLine: BOOT_IMAGE=/vmlinuz-5.11.0-16-generic
root=/dev/mapper/vgkubuntu-root ro quiet splash vt.handoff=7
RelatedPackageVersions:
linux-restricted-modules-5.11.0-16-generic N/A
linux-backports-modules-5.11.0-16-generic N/A
linux-firmware 1.197
SourcePackage: linux
UpgradeStatus: Upgraded to hirsute on 2021-04-30 (0 days ago)
dmi.bios.date: 03/09/2021
dmi.bios.release: 2.15
dmi.bios.vendor: Dell Inc.
dmi.bios.version: 2.15.1
dmi.board.name: 0115N5
dmi.board.vendor: Dell Inc.
dmi.board.version: A00
dmi.chassis.type: 9
dmi.chassis.vendor: Dell Inc.
dmi.modalias:
dmi:bvnDellInc.:bvr2.15.1:bd03/09/2021:br2.15:svnDellInc.:pnXPS139360:pvr:rvnDellInc.:rn0115N5:rvrA00:cvnDellInc.:ct9:cvr:
dmi.product.family: XPS
dmi.product.name: XPS 13 9360
dmi.product.sku: 075B
dmi.sys.vendor: Dell Inc.
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