Output of ethtools on 6.17.0:
```
# ethtool enx3c8cf86066c4
Settings for enx3c8cf86066c4:
Supported ports: [ ]
Supported link modes: Not reported
Supported pause frame use: No
Supports auto-negotiation: No
Supported FEC modes: Not reported
Advertised link modes: Not reported
Advertised pause frame use: No
Advertised auto-negotiation: No
Advertised FEC modes: Not reported
Speed: 2500Mb/s
Duplex: Unknown! (255)
Auto-negotiation: off
Port: Twisted Pair
PHYAD: 0
Transceiver: internal
MDI-X: Unknown
Current message level: 0x00000007 (7)
drv probe link
Link detected: yes
# ethtool enx3c8cf860663b
Settings for enx3c8cf860663b:
Supported ports: [ ]
Supported link modes: Not reported
Supported pause frame use: No
Supports auto-negotiation: No
Supported FEC modes: Not reported
Advertised link modes: Not reported
Advertised pause frame use: No
Advertised auto-negotiation: No
Advertised FEC modes: Not reported
Speed: 2500Mb/s
Duplex: Unknown! (255)
Auto-negotiation: off
Port: Twisted Pair
PHYAD: 0
Transceiver: internal
MDI-X: Unknown
Current message level: 0x00000007 (7)
drv probe link
Link detected: yes
```
Btw, I haven't disabled autonegotiation myself. Either driver or adapter does
not support it, when I try to enable it fails:
```
# ethtool -s enx3c8cf860663b autoneg on
netlink error: Operation not supported
```
The output of ethtools on 6.8.0 exactly the same except: `Duplex: Half`
Attached lspci.txt
** Attachment added: "lspci.txt"
https://bugs.launchpad.net/ubuntu/+source/linux-hwe-6.17/+bug/2140567/+attachment/5945813/+files/lspci.txt
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https://bugs.launchpad.net/bugs/2140567
Title:
USB network adapter using cdc_ncm driver won't work starting
6.17.0-14-generic
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