#1150181 linux-image-7.2.9+deb14-amd64: failures with Dell WD22TB4 Thunderbolt Dock

Package:
src:linux
Source:
src:linux
Submitter:
Vincent Lefevre
Date:
2026-10-07 00:35:02 UTC
Severity:
normal
#1150181#5
Date:
2026-10-06 16:38:42 UTC
From:
To:
On my Dell Precision 5570 laptop, the Dell WD22TB4 Thunderbolt Dock
is unusable with the linux-image-7.2.9+deb14-amd64 kernel. I get a
succession of errors like

Oct 06 18:14:51 qaa kernel: thunderbolt 0-1: new device found, vendor=0xd4 device=0xb071
Oct 06 18:14:51 qaa kernel: thunderbolt 0-1: Dell WD22TB4 Thunderbolt Dock
Oct 06 18:14:51 qaa kernel: thunderbolt 0-0:1.1: new retimer found, vendor=0x8087 device=0x15ee
Oct 06 18:14:51 qaa kernel: thunderbolt 0-0:1.2: new retimer found, vendor=0x8087 device=0x15ee
Oct 06 18:14:51 qaa kernel: thunderbolt 0000:00:0d.2: 1: failed to enable TMU
Oct 06 18:14:51 qaa kernel: thunderbolt 0000:00:0d.2: 1: USB3 tunnel creation failed
Oct 06 18:14:51 qaa kernel: thunderbolt 0-0:1.2: retimer disconnected
Oct 06 18:14:51 qaa kernel: thunderbolt 0-0:1.1: retimer disconnected
Oct 06 18:14:51 qaa kernel: thunderbolt 0-1: device disconnected
[...]
Oct 06 18:17:10 qaa kernel: thunderbolt 0-1: new device found, vendor=0xd4 device=0xb071
Oct 06 18:17:10 qaa kernel: thunderbolt 0-1: Dell WD22TB4 Thunderbolt Dock
Oct 06 18:17:10 qaa kernel: thunderbolt 0-0:1.1: new retimer found, vendor=0x8087 device=0x15ee
Oct 06 18:17:10 qaa kernel: thunderbolt 0-0:1.2: new retimer found, vendor=0x8087 device=0x15ee
Oct 06 18:17:10 qaa kernel: thunderbolt 0000:00:0d.2: 1: failed to enable TMU
Oct 06 18:17:10 qaa kernel: thunderbolt 0000:00:0d.2: 1: USB3 tunnel creation failed
Oct 06 18:17:10 qaa kernel: thunderbolt 0000:00:0d.2: 1:9: PCIe tunnel activation failed, aborting
Oct 06 18:17:10 qaa kernel: thunderbolt 0-0:1.2: retimer disconnected
Oct 06 18:17:10 qaa kernel: thunderbolt 0-0:1.1: retimer disconnected
Oct 06 18:17:10 qaa kernel: thunderbolt 0-1: device disconnected

There was no such issue with the 7.1.13+deb14 kernel.
#1150181#10
Date:
2026-10-06 16:56:37 UTC
From:
To:
Control: found -1 7.2.8-1
[...]

Same problem with the linux-image-7.2.8+deb14-amd64 7.2.8-1 kernel,
which is currently in testing. So

linux-image-7.1.13+deb14-amd64 7.1.13-1  OK
linux-image-7.2.8+deb14-amd64  7.2.8-1   broken
linux-image-7.2.9+deb14-amd64  7.2.9-1   broken
#1150181#17
Date:
2026-10-06 18:25:43 UTC
From:
To:
Control: found -1 7.1.13-1

Well, I've reinstalled linux-image-7.1.13+deb14-amd64 7.1.13-1,
and the problem now occurs with it!!!

Still no issues with linux-image-6.7.12-amd64 6.7.12-1, which
I had installed 2 years ago, with an initrd.img-6.7.12-amd64
from 2025-12-13.

So this could be a bug related to initramfs.

Something new is that various firmware-* packages were upgraded
from 20260810-1 to 20260916-1. When I had installed a working
linux-image-7.1.13+deb14-amd64:amd64 7.1.13-1 kernel, it was
on 2026-09-11, thus before this firmware-* upgrade.
#1150181#24
Date:
2026-10-06 23:47:17 UTC
From:
To:
Control: found -1 6.12.111-1
linux-image-7.1.13+deb14-amd64 7.1.13-1, but this did not solve the
issue.

Same issue with linux-image-6.12.111+deb13-amd64 6.12.111-1 from
stable-security.

Note that when I used linux-image-7.1.13+deb14-amd64 7.1.13-1 a few
weeks ago:

Sep 11 17:57:04 qaa kernel: Linux version 7.1.13+deb14-amd64 (debian-kernel@lists.debian.org) (x86_64-linux-gnu-gcc-15 (Debian 15.3.0-3) 15.3.0, GNU ld (GNU Binutils for Debian) 2.47) #1 SMP PREEMPT_DYNAMIC Debian 7.1.13-1 (2026-09-03)
Sep 11 17:57:04 qaa kernel: Command line: BOOT_IMAGE=/vmlinuz-7.1.13+deb14-amd64 root=/dev/mapper/qaa--vg-root ro quiet blacklist=parport_pc
[...]
Sep 11 17:57:04 qaa kernel: thunderbolt 0-1: new device found, vendor=0xd4 device=0xb071
Sep 11 17:57:04 qaa kernel: thunderbolt 0-1: Dell WD22TB4 Thunderbolt Dock
Sep 11 17:57:04 qaa kernel: usb usb2-port1: attempt power cycle
Sep 11 17:57:04 qaa kernel: thunderbolt 0000:00:0d.2: 1: failed to enable CL states
Sep 11 17:57:04 qaa kernel: thunderbolt 0000:00:0d.2: 1: failed to enable TMU
Sep 11 17:57:04 qaa kernel: thunderbolt 0000:00:0d.2: 1: USB3 tunnel creation failed
Sep 11 17:57:04 qaa kernel: thunderbolt 0-1: device disconnected
Sep 11 17:57:04 qaa kernel: thunderbolt 0-1: new device found, vendor=0xd4 device=0xb071
Sep 11 17:57:04 qaa kernel: thunderbolt 0-1: Dell WD22TB4 Thunderbolt Dock
Sep 11 17:57:04 qaa kernel: thunderbolt 0-0:1.1: new retimer found, vendor=0x8087 device=0x15ee
Sep 11 17:57:04 qaa kernel: thunderbolt 0-0:1.2: new retimer found, vendor=0x8087 device=0x15ee
Sep 11 17:57:04 qaa kernel: usb 3-1: new high-speed USB device number 6 using xhci_hcd
Sep 11 17:57:04 qaa kernel: usb 3-1: New USB device found, idVendor=1d5c, idProduct=5801, bcdDevice= 1.01
Sep 11 17:57:04 qaa kernel: usb 3-1: New USB device strings: Mfr=1, Product=2, SerialNumber=0
Sep 11 17:57:04 qaa kernel: usb 3-1: Product: USB2.0 Hub
Sep 11 17:57:04 qaa kernel: usb 3-1: Manufacturer: Fresco Logic, Inc.
[...]

and

Sep 24 00:47:45 qaa kernel: Linux version 7.1.13+deb14-amd64 (debian-kernel@lists.debian.org) (x86_64-linux-gnu-gcc-15 (Debian 15.3.0-3) 15.3.0, GNU ld (GNU Binutils for Debian) 2.47) #1 SMP PREEMPT_DYNAMIC Debian 7.1.13-1 (2026-09-03)
Sep 24 00:47:45 qaa kernel: Command line: BOOT_IMAGE=/vmlinuz-7.1.13+deb14-amd64 root=/dev/mapper/qaa--vg-root ro quiet blacklist=parport_pc
[...]
Sep 24 00:47:45 qaa kernel: thunderbolt 0-1: new device found, vendor=0xd4 device=0xb071
Sep 24 00:47:45 qaa kernel: thunderbolt 0-1: Dell WD22TB4 Thunderbolt Dock
Sep 24 00:47:45 qaa kernel: thunderbolt 0-0:1.1: new retimer found, vendor=0x8087 device=0x15ee
Sep 24 00:47:45 qaa kernel: thunderbolt 0-0:1.2: new retimer found, vendor=0x8087 device=0x15ee
Sep 24 00:47:45 qaa kernel: usb 3-1: new high-speed USB device number 7 using xhci_hcd
Sep 24 00:47:45 qaa kernel: usb 2-1: new SuperSpeed Plus Gen 2x1 USB device number 2 using xhci_hcd
Sep 24 00:47:45 qaa kernel: usb 2-1: New USB device found, idVendor=8087, idProduct=0b40, bcdDevice=12.34
Sep 24 00:47:45 qaa kernel: usb 2-1: New USB device strings: Mfr=1, Product=2, SerialNumber=0
Sep 24 00:47:45 qaa kernel: usb 2-1: Product: USB3.0 Hub
Sep 24 00:47:45 qaa kernel: usb 2-1: Manufacturer: Intel Corporation.
[...]

and

Sep 24 18:28:43 qaa kernel: Linux version 7.1.13+deb14-amd64 (debian-kernel@lists.debian.org) (x86_64-linux-gnu-gcc-15 (Debian 15.3.0-3) 15.3.0, GNU ld (GNU Binutils for Debian) 2.47) #1 SMP PREEMPT_DYNAMIC Debian 7.1.13-1 (2026-09-03)
Sep 24 18:28:43 qaa kernel: Command line: BOOT_IMAGE=/vmlinuz-7.1.13+deb14-amd64 root=/dev/mapper/qaa--vg-root ro quiet blacklist=parport_pc
[...]
Sep 24 18:28:43 qaa kernel: thunderbolt 0-1: new device found, vendor=0xd4 device=0xb071
Sep 24 18:28:43 qaa kernel: thunderbolt 0-1: Dell WD22TB4 Thunderbolt Dock
Sep 24 18:28:43 qaa kernel: thunderbolt 0-0:1.1: new retimer found, vendor=0x8087 device=0x15ee
Sep 24 18:28:43 qaa kernel: thunderbolt 0-0:1.2: new retimer found, vendor=0x8087 device=0x15ee
Sep 24 18:28:43 qaa kernel: thunderbolt 0000:00:0d.2: 1: failed to enable TMU
Sep 24 18:28:43 qaa kernel: thunderbolt 0000:00:0d.2: 1: USB3 tunnel creation failed
Sep 24 18:28:43 qaa kernel: thunderbolt 0-0:1.2: retimer disconnected
Sep 24 18:28:43 qaa kernel: thunderbolt 0-0:1.1: retimer disconnected
Sep 24 18:28:43 qaa kernel: thunderbolt 0-1: device disconnected
Sep 24 18:28:43 qaa kernel: thunderbolt 0-1: new device found, vendor=0xd4 device=0xb071
Sep 24 18:28:43 qaa kernel: thunderbolt 0-1: Dell WD22TB4 Thunderbolt Dock
Sep 24 18:28:43 qaa kernel: thunderbolt 0-0:1.1: new retimer found, vendor=0x8087 device=0x15ee
Sep 24 18:28:43 qaa kernel: thunderbolt 0-0:1.2: new retimer found, vendor=0x8087 device=0x15ee
Sep 24 18:28:43 qaa kernel: usb 3-1: new high-speed USB device number 6 using xhci_hcd
Sep 24 18:28:43 qaa kernel: usb 2-1: new SuperSpeed Plus Gen 2x1 USB device number 2 using xhci_hcd
Sep 24 18:28:43 qaa kernel: usb 3-1: New USB device found, idVendor=1d5c, idProduct=5801, bcdDevice= 1.01
Sep 24 18:28:43 qaa kernel: usb 3-1: New USB device strings: Mfr=1, Product=2, SerialNumber=0
Sep 24 18:28:43 qaa kernel: usb 3-1: Product: USB2.0 Hub
Sep 24 18:28:43 qaa kernel: usb 3-1: Manufacturer: Fresco Logic, Inc.

For the Sep 11 17:57:04 and Sep 24 18:28:43, there was an initial
failure with "failed to enable TMU", but the second attempt succeeded.
Now I always get "failed to enable TMU" for the kernels I reinstall.

Still no issues with the kernel I had installed in the past:

Oct 06 18:48:24 qaa kernel: Linux version 6.7.12-amd64 (debian-kernel@lists.debian.org) (x86_64-linux-gnu-gcc-13 (Debian 13.2.0-23) 13.2.0, GNU ld (GNU Binutils for Debian) 2.42) #1 SMP PREEMPT_DYNAMIC Debian 6.7.12-1 (2024-04-24)
Oct 06 18:48:24 qaa kernel: Command line: BOOT_IMAGE=/vmlinuz-6.7.12-amd64 root=/dev/mapper/qaa--vg-root ro quiet blacklist=parport_pc
[...]
Oct 06 18:48:24 qaa kernel: usb 1-1.1: new high-speed USB device number 5 using xhci_hcd
Oct 06 18:48:24 qaa kernel: usb 1-1.1: New USB device found, idVendor=0bda, idProduct=5487, bcdDevice= 1.62
Oct 06 18:48:24 qaa kernel: usb 1-1.1: New USB device strings: Mfr=1, Product=2, SerialNumber=0
Oct 06 18:48:24 qaa kernel: usb 1-1.1: Product: Dell dock
Oct 06 18:48:24 qaa kernel: usb 1-1.1: Manufacturer: Dell Inc.
Oct 06 18:48:24 qaa kernel: hub 1-1.1:1.0: USB hub found
Oct 06 18:48:24 qaa kernel: hub 1-1.1:1.0: 5 ports detected
Oct 06 18:48:24 qaa kernel: thunderbolt 0-0:1.1: new retimer found, vendor=0x8087 device=0x15ee
Oct 06 18:48:24 qaa kernel: usb 1-10: new full-speed USB device number 6 using xhci_hcd
Oct 06 18:48:24 qaa kernel: thunderbolt 0-0:1.2: new retimer found, vendor=0x8087 device=0x15ee
Oct 06 18:48:24 qaa kernel: thunderbolt 0-1: new device found, vendor=0xd4 device=0xb071
Oct 06 18:48:24 qaa kernel: thunderbolt 0-1: Dell WD22TB4 Thunderbolt Dock
Oct 06 18:48:24 qaa kernel: usb 1-10: New USB device found, idVendor=8087, idProduct=0033, bcdDevice= 0.00
Oct 06 18:48:24 qaa kernel: usb 1-10: New USB device strings: Mfr=0, Product=0, SerialNumber=0
Oct 06 18:48:24 qaa kernel: usb 1-1.1.3: new high-speed USB device number 7 using xhci_hcd
Oct 06 18:48:24 qaa kernel: usb 1-1.1.3: New USB device found, idVendor=0bda, idProduct=5413, bcdDevice= 1.23
Oct 06 18:48:24 qaa kernel: usb 1-1.1.3: New USB device strings: Mfr=1, Product=2, SerialNumber=0
Oct 06 18:48:24 qaa kernel: usb 1-1.1.3: Product: Dell dock
Oct 06 18:48:24 qaa kernel: usb 1-1.1.3: Manufacturer: Dell Inc.
[...]

Oct 06 20:17:10 qaa kernel: Linux version 6.7.12-amd64 (debian-kernel@lists.debian.org) (x86_64-linux-gnu-gcc-13 (Debian 13.2.0-23) 13.2.0, GNU ld (GNU Binutils for Debian) 2.42) #1 SMP PREEMPT_DYNAMIC Debian 6.7.12-1 (2024-04-24)
Oct 06 20:17:10 qaa kernel: Command line: BOOT_IMAGE=/vmlinuz-6.7.12-amd64 root=/dev/mapper/qaa--vg-root ro quiet blacklist=parport_pc
[...]
Oct 06 20:17:10 qaa kernel: usb 1-1.1: new high-speed USB device number 5 using xhci_hcd
Oct 06 20:17:10 qaa kernel: usb 1-1.1: New USB device found, idVendor=0bda, idProduct=5487, bcdDevice= 1.62
Oct 06 20:17:10 qaa kernel: usb 1-1.1: New USB device strings: Mfr=1, Product=2, SerialNumber=0
Oct 06 20:17:10 qaa kernel: usb 1-1.1: Product: Dell dock
Oct 06 20:17:10 qaa kernel: usb 1-1.1: Manufacturer: Dell Inc.
Oct 06 20:17:10 qaa kernel: hub 1-1.1:1.0: USB hub found
Oct 06 20:17:10 qaa kernel: hub 1-1.1:1.0: 5 ports detected
Oct 06 20:17:10 qaa kernel: usb 1-10: new full-speed USB device number 6 using xhci_hcd
Oct 06 20:17:10 qaa kernel: thunderbolt 0-0:1.1: new retimer found, vendor=0x8087 device=0x15ee
Oct 06 20:17:10 qaa kernel: thunderbolt 0-0:1.2: new retimer found, vendor=0x8087 device=0x15ee
Oct 06 20:17:10 qaa kernel: thunderbolt 0-1: new device found, vendor=0xd4 device=0xb071
Oct 06 20:17:10 qaa kernel: thunderbolt 0-1: Dell WD22TB4 Thunderbolt Dock
Oct 06 20:17:10 qaa kernel: usb 1-10: New USB device found, idVendor=8087, idProduct=0033, bcdDevice= 0.00
Oct 06 20:17:10 qaa kernel: usb 1-10: New USB device strings: Mfr=0, Product=0, SerialNumber=0
Oct 06 20:17:10 qaa kernel: usb 1-1.1.3: new high-speed USB device number 7 using xhci_hcd
Oct 06 20:17:10 qaa kernel: usb 1-1.1.3: New USB device found, idVendor=0bda, idProduct=5413, bcdDevice= 1.23
Oct 06 20:17:10 qaa kernel: usb 1-1.1.3: New USB device strings: Mfr=1, Product=2, SerialNumber=0
Oct 06 20:17:10 qaa kernel: usb 1-1.1.3: Product: Dell dock
Oct 06 20:17:10 qaa kernel: usb 1-1.1.3: Manufacturer: Dell Inc.
[...]

Oct 07 01:25:01 qaa kernel: Linux version 6.7.12-amd64 (debian-kernel@lists.debian.org) (x86_64-linux-gnu-gcc-13 (Debian 13.2.0-23) 13.2.0, GNU ld (GNU Binutils for Debian) 2.42) #1 SMP PREEMPT_DYNAMIC Debian 6.7.12-1 (2024-04-24)
Oct 07 01:25:01 qaa kernel: Command line: BOOT_IMAGE=/vmlinuz-6.7.12-amd64 root=/dev/mapper/qaa--vg-root ro quiet blacklist=parport_pc
[...]
Oct 07 01:25:01 qaa kernel: usb 1-1.1: new high-speed USB device number 5 using xhci_hcd
Oct 07 01:25:01 qaa kernel: usb 1-1.1: New USB device found, idVendor=0bda, idProduct=5487, bcdDevice= 1.62
Oct 07 01:25:01 qaa kernel: usb 1-1.1: New USB device strings: Mfr=1, Product=2, SerialNumber=0
Oct 07 01:25:01 qaa kernel: usb 1-1.1: Product: Dell dock
Oct 07 01:25:01 qaa kernel: usb 1-1.1: Manufacturer: Dell Inc.
Oct 07 01:25:01 qaa kernel: hub 1-1.1:1.0: USB hub found
Oct 07 01:25:01 qaa kernel: hub 1-1.1:1.0: 5 ports detected
Oct 07 01:25:01 qaa kernel: thunderbolt 0-0:1.1: new retimer found, vendor=0x8087 device=0x15ee
Oct 07 01:25:01 qaa kernel: thunderbolt 0-0:1.2: new retimer found, vendor=0x8087 device=0x15ee
Oct 07 01:25:01 qaa kernel: thunderbolt 0-1: new device found, vendor=0xd4 device=0xb071
Oct 07 01:25:01 qaa kernel: thunderbolt 0-1: Dell WD22TB4 Thunderbolt Dock
Oct 07 01:25:01 qaa kernel: usb 1-10: new full-speed USB device number 6 using xhci_hcd
Oct 07 01:25:01 qaa kernel: usb 1-10: New USB device found, idVendor=8087, idProduct=0033, bcdDevice= 0.00
Oct 07 01:25:01 qaa kernel: usb 1-10: New USB device strings: Mfr=0, Product=0, SerialNumber=0
Oct 07 01:25:01 qaa kernel: usb 1-1.1.3: new high-speed USB device number 7 using xhci_hcd
Oct 07 01:25:01 qaa kernel: usb 1-1.1.3: New USB device found, idVendor=0bda, idProduct=5413, bcdDevice= 1.25
Oct 07 01:25:01 qaa kernel: usb 1-1.1.3: New USB device strings: Mfr=1, Product=2, SerialNumber=0
Oct 07 01:25:01 qaa kernel: usb 1-1.1.3: Product: Dell dock
Oct 07 01:25:01 qaa kernel: usb 1-1.1.3: Manufacturer: Dell Inc.
[...]
#1150181#31
Date:
2026-10-07 00:33:47 UTC
From:
To:
in later kernels, but that this old kernel did not have TMU/CLx
handling, thus no errors associated with this. This oriented me to
a hardware issue. I unplugged the dock cable, plugged it again, and
rebooted with the 7.2.9 kernel, and everything is now fine.