Summary: When the Mind Dock is the only externally‑powered element (100 W PD into the dock), the Mind 2 does not accept power over Mind Link under Ubuntu — the internal battery discharges until the unit hibernates. The identical hardware setup charges normally under Windows. The Mind’s own USB‑C port charges fine under Ubuntu.
Setup: Mind 2 (Meteor Lake / Arc), BIOS 1.07, Dock firmware 1.04, Ubuntu 24.04, kernel 7.0.0‑28‑generic. PSU UGREEN CD226 (100 W), cable UGREEN US316 (100 W, 5 A e‑marked).
Diagnosis (Linux side):
- No USB‑C PD/Type‑C management is active: /sys/class/typec/ is empty; no ucsi/tcpm modules load by default; only BAT1 exists under /sys/class/power_supply/ (no PD/AC source node).
- The firmware exposes the UCSI ACPI device USBC000:00, and the kernel ships ucsi_acpi — but the device returns _STA = 0 (disabled). modprobe ucsi_acpi loads cleanly yet registers zero Type‑C ports and creates no physical_node on USBC000:00, i.e. the driver has nothing to bind to.
- Thunderbolt/USB4 is up (two domains, security level user).
- No USB‑C/Type‑C/UCSI power option exists in BIOS setup, so _STA is not user‑adjustable.
Interpretation: The Mind’s own port is EC‑managed autonomously (works OS‑independently). The dock power‑in path over Mind Link appears to require OS‑side USB‑C PD negotiation, which Windows performs via its Intel Thunderbolt/PD driver stack; on Linux the standard path is UCSI, which the firmware disables (_STA=0).
Ask: Can the UCSI ACPI device be enabled for Linux (or a supported Linux mechanism provided) so the Mind accepts power from the dock? Happy to run any diagnostics or test firmware.
