Trying to connect ethernet at 1000 Mbps

vijay83.kumar@gmail.com · 2024-01-08 16:26:16

New to Arch, using Lenovo X100e laptop, with Realtek Gigabit ethernet PCI, details below. Using a known good cable that works in a Dell Windows PC. Looks like incorrect hardware version detected. Tried the r8168 driver, same result.

Appreciate any help.

lspci -v
Ethernet controller: Realtek Semiconductor Co., Ltd. RTL8111/8168/8411 PCI Express Gigabit Ethernet Controller (rev 03)
        Subsystem: Realtek Semiconductor Co., Ltd. RTL8111/8168 PCI Express Gigabit Ethernet controller
        Flags: bus master, fast devsel, latency 0, IRQ 17, NUMA node 0
        I/O ports at a000 [size=256]
        Memory at d0004000 (64-bit, prefetchable) [size=4K]
        Memory at d0000000 (64-bit, prefetchable) [size=16K]
        Expansion ROM at d0400000 [virtual] [disabled] [size=128K]
        Capabilities: [40] Power Management version 3
        Capabilities: [50] MSI: Enable- Count=1/1 Maskable- 64bit+
        Capabilities: [70] Express Endpoint, MSI 01
        Capabilities: [ac] MSI-X: Enable+ Count=4 Masked-
        Capabilities: [cc] Vital Product Data
        Capabilities: [100] Advanced Error Reporting
        Capabilities: [140] Virtual Channel
        Capabilities: [160] Device Serial Number cc-00-00-00-68-4c-e0-00
        Kernel driver in use: r8169
        Kernel modules: r8169

$ sudo dmesg | grep r8169
[    5.166929] r8169 0000:02:00.0 eth0: RTL8168d/8111d, 60:eb:69:69:df:47, XID 281, IRQ 26
[    5.166944] r8169 0000:02:00.0 eth0: jumbo features [frames: 9194 bytes, tx checksumming: ko]
[    5.702961] r8169 0000:02:00.0 enp2s0: renamed from eth0
[   54.820497] RTL8211B Gigabit Ethernet r8169-0-200:00: attached PHY driver (mii_bus:phy_addr=r8169-0-200:00, irq=MAC)
[   55.087363] r8169 0000:02:00.0 enp2s0: Link is Down
[   85.484693] r8169 0000:02:00.0 enp2s0: Link is Up - 100Mbps/Full - flow control rx/tx

ethtool enp2s0
Settings for enp2s0:
        Supported ports: [ TP    MII ]
        Supported link modes:   10baseT/Half 10baseT/Full
                                100baseT/Half 100baseT/Full
                                1000baseT/Half 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/Half 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
        Link partner advertised pause frame use: Symmetric Receive-only
        Link partner advertised auto-negotiation: Yes
        Link partner advertised FEC modes: Not reported
        Speed: 100Mb/s
        Duplex: Full
        Auto-negotiation: on
        master-slave cfg: preferred slave
        master-slave status: slave
        Port: Twisted Pair
        PHYAD: 0
        Transceiver: external
        MDI-X: Unknown
netlink error: Operation not permitted
        Link detected: yes

Last edited by vijay83.kumar@gmail.com (2024-01-10 22:47:23)

d.ALT · 2024-01-08 16:47:03

vijay83.kumar@gmail.com wrote:

Supported link modes: 10baseT/Half 10baseT/Full
100baseT/Half 100baseT/Full
1000baseT/Half 1000baseT/Full

Are you connecting to a 100Mbps device (router, switch, etc...)?

Please, use [ code ][ /code ] tags.

vijay83.kumar@gmail.com · 2024-01-08 17:08:33

No, GB ethernet switch

d.ALT · 2024-01-08 17:24:02

Did you set the connection speed @100Mbps in you network manager's connestion settings?
What network manager are you using?

Disable Window's Fast Start, if you're dualbooting.

seth · 2024-01-08 21:58:15

Please use [code][/code] tags. Edit your post in this regard.
Please post your complete system journal for the boot:

sudo journalctl -b | curl -F 'file=@-' 0x0.st

You can use ethtool to turn autoneg off and set the speed manually, but

Using a known good cable that

is probably still the culprit b/c of networking rule #1
Do you have alternative (and in particular *short*) ones?

vijay83.kumar@gmail.com · 2024-01-09 20:14:31

Thanks for all your suggestions!

I am using Network Manager defaults in Arch minimal install without GUI. I believe the speed was set to 100 Mbps by default. When I adjusted settings for autoneg and speed, I was able to connect at 1000 Mbps, but connection was not stable for long.

Now that I know the hardware/cable/r8169 in-kernel driver is good, I will explore Network Manager settings in more detail.

Thanks again!

seth · 2024-01-09 21:12:00

You could try to use just dhcpcd, but if the 1Gbps connection was "not stable" that's because the signal is bad.
With an undisclosed amount of experience: it's the cable. I'm not 100% sure, but (100-ε)% sure. Try a different one.

vijay83.kumar@gmail.com · 2024-01-09 22:35:59

Thanks, will do and let you know.

vijay83.kumar@gmail.com · 2024-01-10 22:49:43

Tried a new 6ft Cat8 cable, same results. I will wait for testing of the r8168 driver.

ewaller · 2024-01-10 23:21:27

Closed, by request.

Arch Linux

#1 2024-01-08 16:26:16

Trying to connect ethernet at 1000 Mbps

#2 2024-01-08 16:47:03

Re: Trying to connect ethernet at 1000 Mbps

#3 2024-01-08 17:08:33

Re: Trying to connect ethernet at 1000 Mbps

#4 2024-01-08 17:24:02

Re: Trying to connect ethernet at 1000 Mbps

#5 2024-01-08 21:58:15

Re: Trying to connect ethernet at 1000 Mbps

#6 2024-01-09 20:14:31

Re: Trying to connect ethernet at 1000 Mbps

#7 2024-01-09 21:12:00

Re: Trying to connect ethernet at 1000 Mbps

#8 2024-01-09 22:35:59

Re: Trying to connect ethernet at 1000 Mbps

#9 2024-01-10 22:49:43

Re: Trying to connect ethernet at 1000 Mbps

#10 2024-01-10 23:21:27

Re: Trying to connect ethernet at 1000 Mbps

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