Displays connected through Thunderbolt dock no longer working
| Affects | Status | Importance | Assigned to | Milestone | |
|---|---|---|---|---|---|
| bolt (Ubuntu) |
New
|
Undecided
|
Unassigned | ||
Bug Description
During a recent kernel update, my Thunderbolt dock (a Thinkpad Thunderbolt 3 Gen 2) stopped working. My computer (A Lenovo Thinkpad P50) still responds to the mouse and keyboard connected to the dock, but my two displays (connected over DisplayPort) don't get any signal. Also, the Displays settings menu only lists the display of the laptop itself.
I'm running Ubuntu 22.04.1 LTS, at kernel version 5.15.0-52-generic which isn't working, just as the previous version (5.15.0-50-generic) also isn't working. Booting into 5.15.0-48-generic makes the displays work again. I have a dual boot setup with Windows 10 on the other disk, which never stopped working. From Windows, I also made sure that the firmware of the dock is updated to the latest version.
I tried unplugging and re-plugging the USB-C cable, which doesn't do anything, just as restarting with the cable plugged in doesn't work either. So far, the only way I've found to make it work is to boot into a previous version of the kernel.
ProblemType: Bug
DistroRelease: Ubuntu 22.04
Package: bolt 0.9.2-1
ProcVersionSign
Uname: Linux 5.15.0-53-generic x86_64
ApportVersion: 2.20.11-0ubuntu82.1
Architecture: amd64
CasperMD5CheckR
CurrentDesktop: ubuntu:GNOME
Date: Fri Nov 18 19:39:00 2022
InstallationDate: Installed on 2022-03-02 (260 days ago)
InstallationMedia: Ubuntu 21.10 "Impish Indri" - Release amd64 (20211012)
ProcEnviron:
LANGUAGE=en_US:en
PATH=(custom, no user)
XDG_RUNTIME_
LANG=en_US.UTF-8
SHELL=/bin/bash
RebootRequiredPkgs: Error: path contained symlinks.
SourcePackage: bolt
UpgradeStatus: Upgraded to jammy on 2022-04-30 (202 days ago)
| Gert Rue Brigsted (grbrigsted) wrote | #1 |
| Gert Rue Brigsted (grbrigsted) wrote | #2 |
I think the issue was related to nvidia drivers. Ubuntu had kept back certain packages when I tried to run `sudo apt upgrade`, most of them related to lib-nvidia. I tried to change the driver to x.org nouveau, which didn't work, but now I could install the kept-back packages. Now Ubuntu showed the driver as being manually installed. What ultimately fixed my problem was running `sudo ubuntu-drivers install`, and then restarting.