I have just noticed that quite a few of my systems now have their Ethernet interfaces running at 100 MBits/s half duplex rather than the expected 1GBits/s.
I think some update has caused this to happen, probably about 10 days ago (noticed something was slow). These are KDE/Plasma GUI systems but I'm not sure if this is due to a change in KDE/Plasma, NetworkManager or something else.
On these systems the KDE/Plasma NeworkManager settings GUI interface now has an "Allow auto-negotiation" checkbox which I don't think was there before and it looks like this is set to non-auto, 100MBit/s, half duplex by default if there is no ETHTOOL_OPTS="autoneg on" in the /etc/sysconfig/network-scripts/ifcfg-* file and on initial setting of a network interface.
I guess this is a change/bug in the KDE-Plasma network manager applet. Where should I file this bug ?