On Sun, Sep 08, 2024 at 12:49:28PM +0100, Zé Loff wrote: > FWIW, I have a couple of utrwn0 devices, and never managed to get > average speeds above 500-600 Kbps out of any of them, even when on > OFDM54 and signal strengths above -50dBm. > > urtwn0: MAC/BB RTL8188CUS, RF 6052 1T1R
The reason for low speed on 8188CUS devices is a firmware limitation. The firmware handles Tx speed selection and somehow does it poorly. There is no way for the driver to override Tx speed selection. This would need a firmware-side fix. > urtwn0: MAC/BB RTL8192EU, RF 6052 2T2R With this particular chip, the driver had a bug causing the device to send all frames at 1 Mbit/s. This bug was fixed in March 2022: https://github.com/openbsd/src/commit/b5162d813ce25a3984cf6cc9f58fcdb16b00f657 tcpbench before: Conn: 1 Mbps: 0.808 Peak Mbps: 1.108 Avg Mbps: 0.808 tcpbench with fix: Conn: 1 Mbps: 21.078 Peak Mbps: 21.078 Avg Mbps: 21.078
