Delayed bug report from March re emails.
summary of the behavior: USB-C to DisplayPort hotplug fails on all four ports, works if plugged in before boot, and ucsi_acpi module reload resolves detection.
- Laptop 13 AMD Ryzen AI 300
- BIOS 03.05 (2025-10-30)
- EC lilac-3.0.5
- PD Controllers: 0.0.0E (both sides)
- Kernel 6.18.7 on Fedora 42
This points to the PD controller firmware — that's what handles alt-mode negotiation for DisplayPort over USB-C.
Delayed bug report from March re emails.
summary of the behavior: USB-C to DisplayPort hotplug fails on all four ports, works if plugged in before boot, and ucsi_acpi module reload resolves detection.
This points to the PD controller firmware — that's what handles alt-mode negotiation for DisplayPort over USB-C.