Network Interface not auto-negotiating properly - Generic.x86_64-9.2.3 - Realtek 1 Gbps - r8169

DugieHowsa · June 5, 2020 at 2:01 PM

I have noticed the following issue since 9.2.2, and just upgraded to 9.2.3. I don't recall this issue happening in the 9.0 releases or earlier.

Code

Starting Kodi (18.7 Git:18.7.1-Leia). Platform: Linux x86 64-bit
Using Release Kodi x64 build
Kodi compiled 2020-06-01 by GCC 8.3.0 for Linux x86 64-bit version 5.1.16 (327952)
Running on LibreELEC (official): 9.2.3, kernel: Linux x86 64-bit version 5.1.16
FFmpeg version/source: 4.0.4-Kodi
Host CPU: Intel(R) Core(TM) i3-6100 CPU @ 3.70GHz, 4 cores available

Upon initial boot, the network interface does not appear to be auto-negotiating to the highest option, 1000/FULL. ethtool ouput indicated that it has though.

Code

# ethtool eth0
Settings for eth0:
Supported ports: [ TP MII ]
Supported link modes:   10baseT/Half 10baseT/Full
100baseT/Half 100baseT/Full
1000baseT/Full
Supported pause frame use: Symmetric Receive-only
Supports auto-negotiation: Yes
Supported FEC modes: Not reported
Advertised link modes:  10baseT/Half 10baseT/Full
100baseT/Half 100baseT/Full
1000baseT/Full
Advertised pause frame use: Symmetric Receive-only
Advertised auto-negotiation: Yes
Advertised FEC modes: Not reported
Link partner advertised link modes:  10baseT/Half 10baseT/Full
100baseT/Half 100baseT/Full
1000baseT/Full
Link partner advertised pause frame use: Symmetric
Link partner advertised auto-negotiation: Yes
Link partner advertised FEC modes: Not reported
Speed: 1000Mb/s
Duplex: Full
Port: MII
PHYAD: 0
Transceiver: internal
Auto-negotiation: on
Supports Wake-on: pumbg
Wake-on: g
Current message level: 0x00000033 (51)
drv probe ifdown ifup
Link detected: yes

Display More

But network transfer speeds never exceed 12 Megabytes/second (100 Mbps), and the network switch port indicates that it is running only at 100 Mbps Full Duplex.

I bounce the network switch interface, and the port properly negotiates to 1000 Mbps FULL Duplex, and network speeds also greatly increase.

After a day or two though, I find that network speeds decrease again, as I see the network switch is again at 100 Mbps Full Duplex.

Log file from most recent boot:
hastebin

Log file from first boot after upgrade when network interface did not come up.
hastebin

dmesg output

hastebin

dmesg output focusing on network interface

Code

dmesg | grep r8169
[    0.515516] libphy: r8169: probed
[    0.515859] r8169 0000:01:00.0 eth0: RTL8168g/8111g, 00:01:6c:d8:5a:00, XID 4c0, IRQ 123
[    0.515861] r8169 0000:01:00.0 eth0: jumbo features [frames: 9200 bytes, tx checksumming: ko]
[   11.433730] Generic Realtek PHY r8169-100:00: attached PHY driver [Generic Realtek PHY] (mii_bus:phy_addr=r8169-100:00, irq=IGNORE)
[   11.577481] r8169 0000:01:00.0 eth0: Link is Down
[   37.966482] r8169 0000:01:00.0 eth0: Link is Up - 1Gbps/Full - flow control rx/tx
[  316.538968] r8169 0000:01:00.0 eth0: Link is Down
[  323.738602] r8169 0000:01:00.0 eth0: Link is Up - 1Gbps/Full - flow control rx/tx
[  747.109745] r8169 0000:01:00.0: invalid large VPD tag 7f at offset 0

02_System.log
hastebin

03_Hardware.log
hastebin