Displays connected to "HP Thunderbolt Dock 280W G4" do not show up

[Eero Aaltonen]

The laptop in question is an HP ZBook Fury 16 G 11
I tested connecting it to an HP Thunderbolt Dock 280W G4 with two external displays connected, both of which I confirmed to be working by booting into Windows 11 just previously.

When plugging in the Thunderbold connector, a number of messages show up in dmesg. Early on, there are messages about failed bridge window assignments

```
[ 2317.736866] pci 0000:09:00.0: bridge window [io size 0x5000]: can't assign; no space
[ 2317.736869] pci 0000:09:00.0: bridge window [io size 0x5000]: failed to assign
```

After the initial dmesg messages complete the following error starts looping

```
AER: Correctable error message received from 0000:0a:04.0
PCIe Bus Error: severity=Correctable, type=Data Link Layer, (Receiver ID)
  device [8086:0b26] error status/mask=00000080/00002000
   [ 7] BadDLLP
```

If the dmesg messages are attached in the bug, the first message after plugging in the dock's thunderbolt connector is
[ 2315.333622] workqueue: acpi_os_execute_deferred hogged CPU for >10000us 4 times, consider switching to WQ_UNBOUND

ProblemType: Bug
DistroRelease: Ubuntu 24.04
Package: xorg 1:7.7+23ubuntu3
ProcVersionSignature: Ubuntu 6.17.0-1012.12-oem 6.17.9
Uname: Linux 6.17.0-1012-oem x86_64
ApportVersion: 2.28.1-0ubuntu3.8
Architecture: amd64
BootLog: Error: [Errno 13] Permission denied: '/var/log/boot.log'
CasperMD5CheckResult: unknown
CompositorRunning: None
CurrentDesktop: ubuntu:GNOME
Date: Mon Mar 2 16:17:52 2026
DistUpgraded: Fresh install
DistroCodename: noble
DistroVariant: ubuntu
ExtraDebuggingInterest: Yes
GraphicsCard:
 Intel Corporation Raptor Lake-S UHD Graphics [8086:a788] (rev 04) (prog-if 00 [VGA controller])
   Subsystem: Hewlett-Packard Company Raptor Lake-S UHD Graphics [103c:8ca7]
 NVIDIA Corporation AD107GLM [RTX 2000 Ada Generation Laptop GPU] [10de:28b8] (rev a1) (prog-if 00 [VGA controller])
   Subsystem: Hewlett-Packard Company AD107GLM [RTX 2000 Ada Generation Laptop GPU] [103c:8ca7]
MachineType: HP HP ZBook Fury 16 G11 Mobile Workstation PC
ProcEnviron:
 LANG=en_US.UTF-8
 PATH=(custom, no user)
 SHELL=/bin/bash
 TERM=xterm-256color
 XDG_RUNTIME_DIR=<set>
ProcKernelCmdLine: BOOT_IMAGE=/vmlinuz-6.17.0-1012-oem root=/dev/mapper/vg_crypt-lvcryptoroot ro quiet splash vt.handoff=7
SourcePackage: xorg
Symptom: display
UpgradeStatus: No upgrade log present (probably fresh install)
dmi.bios.date: 09/01/2025
dmi.bios.release: 3.0
dmi.bios.vendor: HP
dmi.bios.version: W98 Ver. 01.03.00
dmi.board.name: 8CA7
dmi.board.vendor: HP
dmi.board.version: KBC Version 09.42.00
dmi.chassis.type: 10
dmi.chassis.vendor: HP
dmi.ec.firmware.release: 9.66
dmi.modalias: dmi:bvnHP:bvrW98Ver.01.03.00:bd09/01/2025:br3.0:efr9.66:svnHP:pnHPZBookFury16G11MobileWorkstationPC:pvrSBKPFV3:rvnHP:rn8CA7:rvrKBCVersion09.42.00:cvnHP:ct10:cvr:sku9C589AV:
dmi.product.family: 103C_5336AN HP ZBook
dmi.product.name: HP ZBook Fury 16 G11 Mobile Workstation PC
dmi.product.sku: 9C589AV
dmi.product.version: SBKPFV3
dmi.sys.vendor: HP
version.compiz: compiz N/A
version.libdrm2: libdrm2 2.4.125-1ubuntu0.1~24.04.1
version.libgl1-mesa-dri: libgl1-mesa-dri 25.2.8-0ubuntu0.24.04.1
version.libgl1-mesa-glx: libgl1-mesa-glx N/A
version.xserver-xorg-core: xserver-xorg-core 2:21.1.12-1ubuntu1.5
version.xserver-xorg-input-evdev: xserver-xorg-input-evdev N/A
version.xserver-xorg-video-ati: xserver-xorg-video-ati 1:22.0.0-1build1
version.xserver-xorg-video-intel: xserver-xorg-video-intel 2:2.99.917+git20210115-1build1
version.xserver-xorg-video-nouveau: xserver-xorg-video-nouveau 1:1.0.17-2ubuntu0.1

[Eero Aaltonen (ejn)]

Dock firmware was version 1.5.25.0.

Update to dock firmware version 1.5.29.0 Rev.A did not meaningfully change behaviour or messages in Ubuntu.

[Eero Aaltonen (ejn)]

This is/was a problem with NVIDIA drivers.

Initially I was using the recommended driver
NVIDIA driver (open kernel) metapackage from nvidia-driver-590-open (proprietary, tested)

After switching to
NVIDIA driver metapackage from nvidia-driver-590 (proprietary)

external displays (via dock) work.

[Daniel van Vugt (vanvugt)]

A Thunderbolt dock is more likely to connect to the Intel chipset and the Intel GPU, so I'm not sure how relevant the Nvidia driver is... Although I also notice your RTX 2000 had no working Nvidia kernel driver at the time the bug was reported, so that explains why reinstalling a similar Nvidia driver made some difference.

If you encounter similar problems again then please run:

  sudo apt install drm-info
  sudo drm_info > drminfo.txt

and attach the resulting text file here.