Update: This is not a new 7.0 regression. Retained journals show the same dock-path failures on Ubuntu kernels 6.17.0-22-generic and 6.17.0-23-generic: USB setup/address failures (error -71), Thunderbolt disconnects, and AMDGPU AUX/MST/DPCD link errors. For example, a 6.17.0-22 boot logged 10 USB errors, 28 AUX/MST4 errors, and 183 Thunderbolt disconnect messages; another logged 13 USB errors, 24 AUX/MST errors, and 603 Thunderbolt disconnects. The newer 7.0 series adds recurring dcn31_program_compbuf_size warnings, first observed locally on 7.0.0-15, but 7.0.0-28 still exhibits the underlying failure: the dock can disconnect at runtime, blank both external displays, then re-enumerate.
-- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/2161425 Title: Lenovo Thunderbolt 4 dock intermittently fails or disconnects, causing USB device loss and both Radeon 680M-driven external MST displays to blank To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/2161425/+subscriptions -- ubuntu-bugs mailing list [email protected] https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
