Thank you Mika, Here you have the output of sudo journalctl -k without enabling the kernel option "pcie_aspm=off": https://codeshare.io/7JPgpE. Without "pcie_aspm=off", "thunderbolt.host_reset=false" is not needed, my thunderbolt dock does work. I also connected a 4k monitor to the thunderbolt dock thinking it could provide more data. I'm almost sure I used this option when I set up this system because it solved some issues with system suspending, but it happened many months ago. On Tue, May 21, 2024 at 7:15 AM Mika Westerberg <mika.westerberg@xxxxxxxxxxxxxxx> wrote: > > Hi, > > On Mon, May 20, 2024 at 05:57:42PM +0200, Gia wrote: > > Hi Mario, > > > > In my case in both cases the value for: > > > > $ cat /sys/bus/thunderbolt/devices/domain0/iommu_dma_protection > > > > is 0. > > > > Output of sudo journalctl -k with kernel option thunderbolt.dyndbg=+p: > > https://codeshare.io/qAXLoj > > > > Output of sudo dmesg with kernel option thunderbolt.dyndbg=+p: > > https://codeshare.io/zlPgRb > > I see you have "pcie_aspm=off" in the kernel command line. That kind of > affects things. Can you drop that and see if it changes anything? And > also provide a new full dmesg with "thunderbolt.dyndbg=+p" in the > command line (dropping pcie_aspm_off)? > > Also is there any particular reason you have it there?