For unknown reasons QNAP doesn’t want to upgrade the faulty NIC driver. Every time I upgrade and get all kinds of hangs while working with the NAS through SMB. This is only with the 2.5 Gbit port, but that why i bought the NAS…
Tested with QTS 5.2.6.3195
[admin@QNAP /]# dmesg| grep r8125
[ 9.349762] r8125 2.5Gigabit Ethernet driver 9.007.01-NAPI loaded
[ 9.356674] r8125 0002:21:00.0: enabling device (0000 → 0003)
[ 9.378841] r8125: This product is covered by one or more of the following patents: US6,570,884, US6,115,776, and US6,327,625.
[ 9.393673] r8125 Copyright (C) 2021 Realtek NIC software team nicfae@realtek.com
[ 9.963055] r8125 0002:21:00.0 eth1_tmp_56486: renamed from eth1
[ 9.978308] r8125 0002:21:00.0 eth0: renamed from eth1_tmp_56486
[ 91.205639] r8125: eth0: link up
[ 130.398104] r8125: eth0: link down
[ 133.925683] r8125: eth0: link up
[admin@QNAP /]# uname -a
Linux QNAP 5.10.60-qnap #1 SMP Tue Jul 15 00:59:58 CST 2025 aarch64 GNU/Linux