Hey, After my last system update on Aug 27 I noticed my download speeds had completely tanked. Took a while to figure out what was going on but managed to narrow it down.
My setup: - Realtek RTL8125B 2.5GbE (rev 05) - Driver: r8169 (in-kernel) - Kernel before update: 7.1.3.arch2-1 - Kernel after update: 7.1.9.arch1-2 - linux-firmware-realtek went from 20260622-1 to 20260810-2 on the same day Turns out disabling GRO and TSO with ethtool -K eno1 gro off tso off immediately fixes the speeds, so something with the offload handling is broken. Things I tried to narrow it down: - Booted into linux-lts 6.18.47-1 — same issue, so it's not specific to 7.1.9 - Downgraded linux-firmware-realtek back to 20260622-1 — made no difference - Tried r8125-dkms 9.018.00-1 from AUR — actually made things worse - Disabling GRO/TSO — fixes it every time on both kernels Also had 123,985 dropped RX packets on the interface which I think is related. Since it affects both mainline and LTS I'm guessing the bug has been in r8169 for a while and something just started triggering it consistently. Not sure if it's been reported upstream already but figured it was worth flagging. Cheers
