Bug#1111011: Acknowledgement (RTL8125D - link drops)
Package: linux-image-6.12.48+deb13-amd64
Version: 6.12.48-1
Upgrading kernel to 6.12.48 seems to solve the problem.
lsmod|grep 8169
r8169 126976 0
mdio_devres 12288 1 r8169
libphy 233472 3 r8169,mdio_devres,realtek
uname -a
Linux player-101 6.12.48+deb13-amd64 #1 SMP PREEMPT_DYNAMIC Debian 6.12.48-1 (2025-09-20) x86_64 GNU/Linux
cat kern.log |grep r8169
2025-09-26T16:05:53.940936+02:00 player-101 kernel: r8169 0000:01:00.0: enabling device (0000 -> 0003)
2025-09-26T16:05:53.940940+02:00 player-101 kernel: r8169 0000:01:00.0 eth0: RTL8125D, 48:21:0b:76:6b:98, XID 688, IRQ 124
2025-09-26T16:05:53.940946+02:00 player-101 kernel: r8169 0000:01:00.0 eth0: jumbo features [frames: 9194 bytes, tx checksumming: ko]
2025-09-26T16:05:53.941317+02:00 player-101 kernel: Realtek Internal NBASE-T PHY r8169-0-100:00: attached PHY driver (mii_bus:phy_addr=r8169-0-100:00, irq=MAC)
2025-09-26T16:05:53.941318+02:00 player-101 kernel: r8169 0000:01:00.0 eth0: Link is Down
2025-09-26T16:05:53.941319+02:00 player-101 kernel: r8169 0000:01:00.0 eth0: Link is Up - 100Mbps/Full - flow control rx/tx
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