[SOLVED] No LAN available (Cable Unplugged) with Realtek RTL8125

Blaiz0r · 2022-02-28 17:02:12

I'm running Linux-zen 5.16.11-zen1-1-zen and recently (Just today) I found that my LAN network no longer is available. I can use Wireless.

Motherboard: MAG B550M MORTAR WIFI (MS-7C94)

lspci:

2a:00.0 Ethernet controller: Realtek Semiconductor Co., Ltd. RTL8125 2.5GbE Controller (rev 04)
	Subsystem: Micro-Star International Co., Ltd. [MSI] Device 7c94
	Flags: bus master, fast devsel, latency 0, IRQ 36, IOMMU group 15
	I/O ports at f000 [size=256]
	Memory at fcb00000 (64-bit, non-prefetchable) [size=64K]
	Memory at fcb10000 (64-bit, non-prefetchable) [size=16K]
	Capabilities: <access denied>
	Kernel driver in use: r8125
	Kernel modules: r8169, r8125

I have experimented with r8168-dkms from the AUR but this was never used as a driver for my NIC, and r8125-dkms does load as you can see in the above output, but I still have no network response.

r8196 is successfully blacklisted, and isn't listed in lsmod, but r8125 which is listed shows 0 in the Used by column.

journalctl -b:

Feb 28 16:24:48 arch-desk kernel: r8125: loading out-of-tree module taints kernel.
Feb 28 16:24:48 arch-desk kernel: r8125: module verification failed: signature and/or required key missing - tainting kernel
Feb 28 16:24:48 arch-desk kernel: r8125 2.5Gigabit Ethernet driver 9.007.01-NAPI loaded
Feb 28 16:24:48 arch-desk kernel: r8125 0000:2a:00.0: enabling device (0000 -> 0003)
Feb 28 16:24:48 arch-desk kernel: piix4_smbus 0000:00:14.0: SMBus Host Controller at 0xb00, revision 0
Feb 28 16:24:48 arch-desk kernel: piix4_smbus 0000:00:14.0: Using register 0x02 for SMBus port selection
Feb 28 16:24:48 arch-desk kernel: piix4_smbus 0000:00:14.0: Auxiliary SMBus Host Controller at 0xb20
Feb 28 16:24:48 arch-desk kernel: ccp 0000:2f:00.1: enabling device (0000 -> 0002)
Feb 28 16:24:48 arch-desk kernel: ccp 0000:2f:00.1: ccp: unable to access the device: you might be running a broken BIOS.
Feb 28 16:24:48 arch-desk kernel: RAPL PMU: API unit is 2^-32 Joules, 1 fixed counters, 163840 ms ovfl timer
Feb 28 16:24:48 arch-desk kernel: RAPL PMU: hw unit of domain package 2^-16 Joules
Feb 28 16:24:48 arch-desk kernel: input: PC Speaker as /devices/platform/pcspkr/input/input2
Feb 28 16:24:48 arch-desk kernel: cryptd: max_cpu_qlen set to 1000
Feb 28 16:24:48 arch-desk kernel: usb 3-1: New USB device found, idVendor=0424, idProduct=2734, bcdDevice= 1.30
Feb 28 16:24:48 arch-desk kernel: usb 3-1: New USB device strings: Mfr=1, Product=2, SerialNumber=0
Feb 28 16:24:48 arch-desk kernel: usb 3-1: Product: USB2734
Feb 28 16:24:48 arch-desk kernel: usb 3-1: Manufacturer: Microchip Tech
Feb 28 16:24:48 arch-desk kernel: r8125: This product is covered by one or more of the following patents: US6,570,884, US6,115,776, and US6,327,625.
Feb 28 16:24:48 arch-desk kernel: r8125  Copyright (C) 2021  Realtek NIC software team <nicfae@realtek.com> 
                                   This program comes with ABSOLUTELY NO WARRANTY; for details, please see <http://www.gnu.org/licenses/>. 
                                   This is free software, and you are welcome to redistribute it under certain conditions; see <http://www.gnu.org/licenses/>.

Relevant network output:

Feb 28 16:24:49 arch-desk kernel: r8125 0000:2a:00.0 enp42s0: renamed from eth0
...
Feb 28 16:24:49 arch-desk NetworkManager[644]: <info>  [1646065489.9650] manager: (enp42s0): new Ethernet device (/org/freedesktop/NetworkManager/Devices/2)
Feb 28 16:24:49 arch-desk NetworkManager[644]: <info>  [1646065489.9654] settings: (enp42s0): created default wired connection 'Wired connection 1'
Feb 28 16:24:49 arch-desk NetworkManager[644]: <info>  [1646065489.9655] device (enp42s0): state change: unmanaged -> unavailable (reason 'managed', sys-iface-state: 'external')
Feb 28 16:24:49 arch-desk kernel: enp42s0: 0xffffbc8d01e20000, 2c:f0:5d:57:81:25, IRQ 36

ip address:

1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN group default qlen 1000
    link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00
    inet 127.0.0.1/8 scope host lo
       valid_lft forever preferred_lft forever
    inet6 ::1/128 scope host 
       valid_lft forever preferred_lft forever
2: enp42s0: <NO-CARRIER,BROADCAST,MULTICAST,UP> mtu 1500 qdisc mq state DOWN group default qlen 1000
    link/ether 2c:f0:5d:57:81:25 brd ff:ff:ff:ff:ff:ff
3: wlan0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc noqueue state UP group default qlen 1000
    link/ether e0:d4:e8:18:69:56 brd ff:ff:ff:ff:ff:ff
    inet 192.168.1.110/24 brd 192.168.1.255 scope global dynamic noprefixroute wlan0
       valid_lft 84502sec preferred_lft 84502sec
    inet6 fe80::8247:ad1a:453c:e632/64 scope link noprefixroute 
       valid_lft forever preferred_lft forever

Not sure what else to try, any help would be really appreciated.

Last edited by Blaiz0r (2022-03-03 17:27:15)

seth · 2022-02-28 18:18:24

Looks like https://bbs.archlinux.org/viewtopic.php?id=274481
Is this a regression and does it work w/ the lts kernel for you?

Blaiz0r · 2022-02-28 22:08:42

I've not found any help from that post unfortunately, I will try another Kernel, but I want to use zen

seth · 2022-03-01 06:44:15

The main question is wether

seth wrote:

Is this a regression

If this has never worked w/ this setup yet, it's probably the cable.

Blaiz0r · 2022-03-01 11:44:51

Yeah the machine has been working since the end of last year, also the same network cable had been used on another machine prior.

I have changed the cable and still no response, not even a flutter.

seth · 2022-03-01 14:47:11

If this is possibly a regression, you should absolutely check the LTS kernel to verify that.

Blaiz0r · 2022-03-03 09:54:03

OK 'looks' like it was a false alarm, I use a homeplug which has two ports one for my PC and the other for my NAS, before I installed the LTS kernel, I decided to see if switching the cables around would work in the homeplug ports.

My NAS was still accessing the network just fine, so I plugged in the PC into that port and it picked up the network fine, the strange thing is, my NAS is working fine on the previously dead port...

seth · 2022-03-03 13:24:21

Loose plug? What happens when you switch back?

Please always remember to mark resolved threads by editing your initial posts subject - so others will know that there's no task left, but maybe a solution to find.
Thanks.

Blaiz0r · 2022-03-03 17:26:26

Thanks for the reminder, I'll continue to monitor and see if anything changes.

Arch Linux

#1 2022-02-28 17:02:12

[SOLVED] No LAN available (Cable Unplugged) with Realtek RTL8125

#2 2022-02-28 18:18:24

Re: [SOLVED] No LAN available (Cable Unplugged) with Realtek RTL8125

#3 2022-02-28 22:08:42

Re: [SOLVED] No LAN available (Cable Unplugged) with Realtek RTL8125

#4 2022-03-01 06:44:15

Re: [SOLVED] No LAN available (Cable Unplugged) with Realtek RTL8125

#5 2022-03-01 11:44:51

Re: [SOLVED] No LAN available (Cable Unplugged) with Realtek RTL8125

#6 2022-03-01 14:47:11

Re: [SOLVED] No LAN available (Cable Unplugged) with Realtek RTL8125

#7 2022-03-03 09:54:03

Re: [SOLVED] No LAN available (Cable Unplugged) with Realtek RTL8125

#8 2022-03-03 13:24:21

Re: [SOLVED] No LAN available (Cable Unplugged) with Realtek RTL8125

#9 2022-03-03 17:26:26

Re: [SOLVED] No LAN available (Cable Unplugged) with Realtek RTL8125

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