On 10/2/2024 12:42, Harry Wentland wrote:
I was checking out the 6.12 rc1 (through drm-next) kernel and found my system hung at boot. No meaningful message showed on the kernel boot screen. A bisect revealed the culprit to be commit f1bfb4a6fed64de1771b43a76631942279851744 (HEAD) Author: Mathias Nyman <mathias.nyman@xxxxxxxxxxxxxxx> Date: Fri Aug 30 18:26:29 2024 +0300 usb: acpi: add device link between tunneled USB3 device and USB4 Host Interface A revert of this single patch "fixes" the issue and I can boot again.The system in question is a Thinkpad T14 with a Ryzen 7 PRO 6850U CPU.It's running Arch Linux but I doubt that's of consequence. lspci output: https://gist.github.com/hwentland/59aef63d9b742b7b64d2604aae9792e0 acpidump: https://gist.github.com/hwentland/4824afc8d712c3d600be5c291f7f1089 Mario suggested I try modprobe.blacklist=xhci-hcd but that did nothing. Another suggestion to do usbcore.nousb lets me boot to the desktop on a kernel with the faulty patch, without USB functionality, obviously. I'd be happy to try any patches, provide more data, or run experiments. Thanks, Harry
FWIW I did take another Lenovo laptop (Z13) w/ a CPU from the same generation (Ryzen 5 PRO 6650U) and 6.12-rc1 but can't reproduce this issue.
