Hello Lemmy,

Im trying to troubleshoot a connection issue to my laptop which is connect using the buildin ethernet port. The connection drops sometimes for a few minutes and then im able to connect again.

This is the port being used:

k3s-alpine-lap-6:~# lspci -nn | grep -i ethernet
0000:01:00.0 Ethernet controller [0200]: Realtek Semiconductor Co., Ltd. RTL8111/8168/8211/8411 PCI Express Gigabit Ethernet Controller [10ec:8168] (rev 16)

Some information about the drivers being used:

k3s-alpine-lap-6:~# ethtool -i eth0
driver: r8169
version: 6.12.76-0-lts
firmware-version: rtl8168h-2_0.0.2 02/26/15
expansion-rom-version:
bus-info: 0000:01:00.0
supports-statistics: yes
supports-test: no
supports-eeprom-access: no
supports-register-dump: yes
supports-priv-flags: no

Some information i found using dmesg:

[   10.535868] Bridge firewalling registered
[   29.478495] usb 3-1: USB disconnect, device number 2
[   30.635978] atkbd serio0: Unknown key pressed (translated set 2, code 0xd8 on isa0060/serio0).
[   30.635990] atkbd serio0: Use 'setkeycodes e058 <keycode>' to make it known.
[   30.645244] atkbd serio0: Unknown key released (translated set 2, code 0xd8 on isa0060/serio0).
[   30.645256] atkbd serio0: Use 'setkeycodes e058 <keycode>' to make it known.
[   55.836493] EXT4-fs (sda): mounted filesystem f9742482-7e09-4460-a10d-81c5f5abaf23 r/w with ordered data mode. Quota mode: none.
[  347.743005] Initializing XFRM netlink socket
[  354.759146] eth0: renamed from tmp5fca0
[  354.898482] eth0: renamed from tmp375a5
[  354.930148] eth0: renamed from tmpaf7f3
[  354.970131] eth0: renamed from tmpc035d
[  356.883835] eth0: renamed from tmp68492
[  518.679868] Key type trusted registered
[  518.745372] Key type encrypted registered
[  518.750554] device-mapper: uevent: version 1.0.3
[  518.750614] device-mapper: ioctl: 4.48.0-ioctl (2023-03-01) initialised: dm-devel@lists.linux.dev
[  599.682490] hrtimer: interrupt took 24965 ns
[  832.545952] r8169 0000:01:00.0 eth0: Link is Down
[  845.527825] r8169 0000:01:00.0 eth0: Link is Up - 100Mbps/Full - flow control off
[  846.467804] r8169 0000:01:00.0 eth0: Link is Down
[  848.089514] r8169 0000:01:00.0 eth0: Link is Up - 100Mbps/Full - flow control off
[ 2407.857541] r8169 0000:01:00.0 eth0: Link is Down
[ 2420.398450] r8169 0000:01:00.0 eth0: Link is Up - 100Mbps/Full - flow control off

Im not knowledgeable about this types of issues so im not even sure the driver is the issue.

Does someone have a simular experience or knows what could cause this issue i would love to hear it! Have a great day!

(Im sorry my post isn’t very specific about the issue but im not sure how i could better start troubleshooting this)