Wireless Interface

[Gluhwurmchen]

Hello Everyone,
I have a decently working gentoo installation, recently after the kernel update my wireless interface wlp0s20f3 has disappeared. My internet works fine in my laptop, it starts on boot, and Im not able to figure it out which daemon is running in background, that is letting me connect to my saved network. I neither have network manager but wpa.

Now the isssue is without net.wlp0s20f3 starting , libvirt for kvm-qemu refuses to start, I guess I could override but then I think I wont have network inside virtual machine. Pls help me to revert to older changes, Im a newbie so I dont understand how to resolve or approach the problem.

[Hu]

Welcome to the forums. Unfortunately, your post doesn't have enough information that we can help you as-is, but I can prompt you for information that people will likely need.

What kernel version were you running when this last worked? On what kernel does this not work? On a bad kernel, what is the output of ip a (or, if that is not available, ifconfig -a)? If you boot back into the good kernel, does this work again?

You say Internet works fine, but everything else sounds like the network interface is absent and therefore unusable. Did you mean that you are using a wired Ethernet connection in the interim, but want to get wireless working again?

Virtual machines can work fine without bringing up your wireless interface, and in many configurations, won't even check it.

[Gluhwurmchen]

The current kernel version is 6.18.7, worked fine until 6.18.5. Nope Im not using ethernet, strangely wifi is active,but in the form of wlan0, whereis my laptop indicated it as wlp0s20f3 earlier. Now there is no process net.wlp0s20f3 that openrc could identify.

output of ifconfig -a : https://bpa.st/WUKE6

[Gluhwurmchen]

The current kernel version is 6.18.7, worked fine until 6.18.5. Nope Im not using ethernet, strangely wifi is active,but in the form of wlan0, whereis my laptop indicated it as wlp0s20f3 earlier. Now there is no process net.wlp0s20f3 that openrc could identify.

output of ifconfig -a : https://bpa.st/WUKE6

The oldest kernel I have is 6.12.54 and that too doesn't work now.

[NeddySeagoon]

Gluhwurmchen,

I suspect that 'persistent interface renaming' has broken somewhere.

wlan0 is the kernel name for the first discovered wireless interface.
wlp0s20f3 is what udev renames it to.

If you boot a kernel that gives you wlp0s20f3, then

Code: Select all

dmesg | grep wlan

should output the rename message.
That rename will be missing on a kernel where you have wlan0.

udev does lot's of other things too.
Is it still running?
It should appear in the output of

Code: Select all

ps -Alf

propably as udevd as its a deamon.

Your wireless interface works, it just has a new name.

[Gluhwurmchen]

None of the older kernels is recognizing wlp0s20f3 anymore. I dont understand why it is happening.

[Hu]

That suggests this is not a kernel problem, but a udev problem. As Neddy noted, the kernel names the interface wlan0. At some later time, udev may intervene and rename wlan0 to the messier "predictable network interface name." It seems that your udev no longer does this, so you are retaining the kernel-assigned initial name. Please answer Neddy's questions regarding udev.

[Gluhwurmchen]

sorry for the delay, but udev is still running and there is no log of renaming to wlan from dmesg