Hello,
I made a new gentoo fresh install but got a strange "warning" at boot, somthing about ModemManger and no support for a device. It didn't happen on the previous install. I checked what this device represents, and it looks like its Dell D3100 USB3.0 Dock device.

Yes i use dock station for internet because standart eth0 port is broken, so i use usb ethernet adapter, that comes from dock station as usb0 interface.

I also noticed when i run ifconfig, instead of usb0, eth0 shows up. On the previous install there was only usb0 and wlan0.

Can someone help me with this werid situation, i think its not properly configured.

P.S i have also set this in /etc/default/grub
Code:
GRUB_CMDLINE_LINUX_DEFAULT="net.ifnames=0"


The warning in terminal:
https://i.imgur.com/83sjiAg.jpg - first half
https://i.imgur.com/1N0OrFQ.jpg - second half

Please help me, i really don't like that ugly output at the terminal, also i have to actually press enter for login prompt to come up. This is very inconvenient because i use a script that automatically selects the user at login prompt and i have only to type the password.

OK, hundreds of views, no answers, let me try.

Get that network line out of grub & update grub. Whether it works or not, post the output of lspci, & lsusb. We'll start from there.

Thank you for your reply, i appreciate your help, but i asked this same question in another forum. The solution was to install networkmanager without modemmanager USE flag (i am on gentoo). Now that warning doesn't bother me because i uninstalled it.

Ok. Mark the thread solved then. Only the OP can do it.