Arch Linux

Description:

As a matter of fact, my Realtek 8111/8168/8411 onboard Gigabit network adapter did not work with the r8169 driver provided on the current arch install disk (ip a
showed NO CARRIER and state DOWN). The forum's hint was to install linux-lts (i.e. install by using a different distro) and the corresponding r8168-lts module and have r8168 blacklisted. That module came up with the interface in state UP, but no incoming traffic was seen until the cable was plugged out and in again at the pc side (this is the short summary of a longer search).

For some reason (parallel install of Mint 20 with the r8168 driver compiled and installed by myself), I found by chance that the NetworkManager was able to use the device correctly, whenever you set the "Auto-negotiation" flag to Auto in the Advance Network settings (this was not the default!). This also works in Arch !

At this point it has to be mentioned that the r8168 module startup options were already set to
options r8168 speed_mode=100 duplex_mode=1 autoneg_mode=1

Arch users using systemd-networkd can use
NWI=enp5s0f0
/usr/sbin/ethtool -s $NWI autoneg on
to trigger the interface to come up (i.e. setting autoneg to on, even if it is already on !!!,
NWI must contain the name of the network interface of the respective system)
So, this is first bug in the driver, but most probably has to be solved by Realtek (which are not really helpful).

The second point is: The Mint system (using NetworkManager) comes up and reboots correctly,
while the Arch system powers_down/shuts_down the interface on system shutdown or reboot, and after that the interface
is not working at all anymore (i.e. the pc _and_ the network switch have to be disconnected from the outlet for minutes)

If I set

options r8168 speed_mode=100 duplex_mode=1 autoneg_mode=1 s5wol=1

however, this problem disappears!

A closer look at the modules Makefile (Realtek original source, same version) shows me that
ENABLE_S5WOL = y
should be enabled by default.
But obviously, the current r8168-lts module does not have this setting enabled.

Can you please check your sources for this and fix the issue?


Additional info:
r8168-lts-8.048.03-8-x86_64.pkg.tar.zst
current linux-lts

Steps to reproduce:
Have a system with an onboard Realtek 8111/8168/8411
install linux-lts r8168-lts, blacklist r8169
boot the system and get the network card to run
(note: the above mentioned settings are in /etc/modprobe.d/r8168.conf)