Control: retitle -1 A20-OLinuXino-Lime2-(eMMC): Rev. K, G2: very poor/no ethernet performance
Hi all, the last days, I tried upgrading two A20-OLinuXino-Lime2 boards to bullseye. After booting the bullseye kernel, 5.10.46-4 (2021-08-03), the network did not work anymore: The interface shows up (IIRC, even a link is detected), but any attempts to connect (DHCP) fail. After playing with different delays following [1], I succeeded with CONFIG_GMAC_TX_DELAY=4, where both boards seem to work fine. I also played a bit with iperf3: At higher bitrates (> approx. 200Mbits/s) more and more retries seem to be needed. So the issue this bug is about seems to affect also the G2 revision boards that worked fine so far. Best regards, Andi [1] https://wiki.debian.org/InstallingDebianOn/Allwinner#Olimex_A20-OLinuXino-LIME2_rev._K.3B_rev._G2_and_bullseye_kernel
