Due to a bug, the Triple Speed Ethernet (TSE) SGMII PCS only variant does not correctly advertize its device capability to the partner device during auto-negotiation.
Currently the TSE PCS only variant always exchanges the control word 0x4001 when the correct code word would typically be 0xd801 depending on the configuration of the IF_Mode Register.
This issue affects all TSE PCS SGMII only implementations in all devices.
This issue will be fixed in a future version of the Quartus® II software.