Hi! I have an odd issue that has been consistent since I started using the 2.5Gb adapter about 4 months ago:
If I boot the computer with the adapter (USB) plugged in to my laptop (and a CAT7 cable connected to the adapter) I have a zippy, solid connection (1000Mb/s). Love it!
If I later unplug the USB adapter (with CAT7 connected) and plug it back in, everything seems to detect that the device exists, but it reports consistently that the link is not detected (cable unplugged). For example, sudo ethtool enx8cae4cdd3882 reports “Link detected: no”. Same with the graphical settings program for the network in my OS.
Similarly, if I do NOT plug in the USB adapter (with CAT7 connected) at boot time, and then later decide I would like to connect it, the USB device is added, but it’s still “Link detected: no”.
One additional (somewhat strange) piece of info: If I plug the USB adapter in at boot time, but leave the CAT7 cable disconnected, then boot up, and finally connect the CAT7 cable, the speed of the network connection drops significantly: sudo ethtool enx8cae4cdd3882 detects “Speed: 100Mb/s” instead of “Speed: 1000Mb/s”. Repeating this is consistent, and I never get 1000Mb/s unless I reboot.
Any thoughts or directions to explore? It’s really puzzling me. Thanks!
OS: Pop!_OS 22.04
Linux Kernel: 6.0.6-76060006-generic