[Bug 221861] ucsi_acpi fails to probe on HP EliteBook X G1a (PNP0CA0/USBC000:00), USB-PD stuck at 100W SPR, cannot reach 140W EPR

https://bugzilla.kernel.org/show_bug.cgi?id=221861

--- Comment #6 from [email protected] ---
Reproduces on stock Arch kernel 7.1.6-arch1-1 (not just CachyOS's patched
linux-cachyos build) — same symptom: ucsi_acpi loaded, device present, driver
never binds, zero dmesg output on both boot and manual bind attempt:
❯ uname -r
  lsmod | grep ucsi
  readlink /sys/bus/platform/devices/USBC000:00/driver
  sudo dmesg | grep -i ucsi
7.1.6-arch1-1
ucsi_acpi              12288  0
typec_ucsi             81920  1 ucsi_acpi
roles                  16384  1 typec_ucsi
typec                 135168  1 typec_ucsi
Place your right index finger on the fingerprint reader
Failed to match fingerprint
Place your right index finger on the fingerprint reader
[    0.008172] ACPI: SSDT 0x00000000491E0000 001A39 (v02 HP     UcsiAcpi
00000001 INTL 20200717)
[    0.008174] ACPI: SSDT 0x00000000491DF000 0000FB (v02 HP     UcsiCntr
00000001 INTL 20200717)

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