[+cc pciehp, thunderbolt, nvme folks; +bcc Andrey (reporter)] Andrey, sorry that you tripped over this, and thank you very much for reporting it. I'm forwarding this to the mailing lists because most subsystems don't really pay attention to the bugzilla. Obviously we don't want to have to use kernel args to make things work, and we also don't want to have to use /sys/bus/pci/rescan after a hot-add. IIUC, if you boot while the SSD in the enclosure is already attached to the USB 3.2 port, everything works fine? Could you please attach a complete dmesg log from such a boot to the bugzilla, just as a baseline? ----- Forwarded message from bugzilla-daemon@xxxxxxxxxx ----- https://bugzilla.kernel.org/show_bug.cgi?id=220175 Summary: NVMe SSD doesn't work via Thunderbolt enclosure on Framework 13 (Ryzen AI 300) Created attachment 308180 --> https://bugzilla.kernel.org/attachment.cgi?id=308180&action=edit lspci -vvv I have a Samsung 970 Evo Plus SSD installed in an ACASIS TBU401E USB4 enclosure. When I connect it to the USB 3.2 port, everything is fine, the SSD is detected by the scsi driver and shows up in the system as /dev/sdb. But when I plug it into the USB4 port, the device doesn't show up. However, I can connect and use this disk by using kernel args `nvme_core.default_ps_max_latency_us=0 pcie_aspm=off pcie_port_pm=off` and doing `echo 1 | sudo tee /sys/bus/pci/rescan` after connecting the SSD. Solution described in https://bugzilla.kernel.org/show_bug.cgi?id=216000#c65 doesn't help and breaks most of the PCIe devices in the system. More info: ``` $ uname -r 6.14.6-300.fc42.x86_64 $ ls /dev/nvme* zsh: no matches found: /dev/nvme* $ cat /sys/bus/thunderbolt/devices/1-2/vendor_name ACASIS $ cat /sys/bus/thunderbolt/devices/1-2/authorized 1 $ inxi -MC Machine: Type: Laptop System: Framework product: Laptop 13 (AMD Ryzen AI 300 Series) v: A9 serial: <superuser required> Mobo: Framework model: FRANMGCP09 v: A9 serial: <superuser required> UEFI: INSYDE v: 03.03 date: 03/10/2025 CPU: Info: 12-core model: AMD Ryzen AI 9 HX 370 w/ Radeon 890M bits: 64 ```
