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Several ConnectX-3 cards never light up optical transceivers but work with DACs
Mellanox ConnectX-3 MCX314A-BCBT and MCX354A-FCB cards (firmware 2.42.5000, driver 5.50.14740.1) were detected in Windows 11 and Ubuntu 22.10 but no optical transceiver ever emitted light: Cisco QSFP-40G-SR-BD, Cisco SFP-10G-SR and Mellanox MFM1T02A-SR were tried on LC-LC OM3, aross three…
