Try adding thunderbolt.host_reset=0 to your kernel command line.
Suspect it's the changes that came in
https://launchpad.net/ubuntu/+source/linux/6.8.0-38.38:
- thunderbolt: Introduce tb_port_reset()
- thunderbolt: Introduce tb_path_deactivate_hop()
- thunderbolt: Make tb_switch_reset() support Thunderbolt 2, 3 and USB4
routers
- thunderbolt: Reset topology created by the boot firmware
These changes were done to fix a number of other issues with re-using
boot firmware settings. That kernel command line option will align it
with old behavior as a workaround.
I feel that a "correct" solution for your issue would be for
'thunderbolt.ko' and boltd to be included in the initramfs so that the
reset happens before the rootfs is mounted.
** Also affects: initramfs-tools (Ubuntu)
Importance: Undecided
Status: New
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https://bugs.launchpad.net/bugs/2078573
Title:
I can no longer boot from my Thunderbolt disk
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