Thunderbolt video broken after Kernel 6-5-0-1024-oem update

Bug #2070094 reported by BeatDirector
6
This bug affects 1 person
Affects Status Importance Assigned to Milestone
linux-oem-6.5 (Ubuntu)
New
Undecided
Unassigned

Bug Description

Since Linux Kernel 6-5-0-1024-oem update external monitor, connected over thunderbolt cable, does not show image but is detected by correct name and refresh rate.

Kernel by oem-sutton-addie-meta enabled in software package additional driver section.

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Installed Kubuntu 22.04:
Ubuntu 22.04.4 LTS
Release 22.04
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Kernel linux-oem-6.5.0-1024
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Device: Lenovo Thinkpad T16 Gen 2 AMD
https://ubuntu.com/certified/202309-32045

Current Kernel: Linux 6.5.0-1024-oem
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Expected:
Connect external display Samsung LC34J791WTU LED (34") over thunderbolt and get video signal.
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What happend instead:
External display is detected but no video. Blackscreen instead. I need to manually choose older kernel "Linux 6.5.0-1023-oem" during boot to get video signal correctly. Seems like something broke in 6.5.0-oem-1024 release

Additional info:
Same wrong behaviour on linux kernel 6.5.0-41-generic but video works on older 6.5.0.35-generic selected during boot.

Tags: jammy
Paul White (paulw2u)
affects: ubuntu → linux-oem-6.5 (Ubuntu)
tags: added: jammy
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