I've spent the last hours trying to figure out how to get my wifi working. Today I updated from Pop_OS 20.04 to 20.10. Everything worked fine, but after an hour my 5GHz Wifi connection stated constantly dropping over and over again. So I restarted the network manager and the 5GHz network was gone. I then decided to just use the 2.4GHz one, which worked for a while until it started disconnecting too. After another hour I couldn't even use the internet anymore, as it constantly kept connecting and disconnecting (in a 5 second rythm). Then I finally started trying to fix the problem. At first I tried searching online which brought me to the idea to reinstall bcmwl-kernel-source, which then resulted in it not being able to reinstall anymore. Nothing network related with my network card works at the moment.
This is the error I am getting:
Reading package lists... Done
Building dependency tree
Reading state information... Done
dkms is already the newest version (2.8.3-4ubuntu0.1).
0 upgraded, 0 newly installed, 0 to remove and 2 not upgraded.
1 not fully installed or removed.
After this operation, 0 B of additional disk space will be used.
Do you want to continue? [Y/n] y
Setting up bcmwl-kernel-source (6.30.223.271+bdcom-0ubuntu7) ...
Removing old bcmwl-6.30.223.271+bdcom DKMS files...
Deleting module version: 6.30.223.271+bdcom
completely from the DKMS tree.
Done.
Loading new bcmwl-6.30.223.271+bdcom DKMS files...
Building for 5.11.0-7612-generic
Building for architecture x86_64
Building initial module for 5.11.0-7612-generic
ERROR (dkms apport): kernel package linux-headers-5.11.0-7612-generic is not supported
Error! Bad return status for module build on kernel: 5.11.0-7612-generic (x86_64)
Consult /var/lib/dkms/bcmwl/6.30.223.271+bdcom/build/make.log for more information.
dpkg: error processing package bcmwl-kernel-source (--configure):
installed bcmwl-kernel-source package post-installation script subprocess returned error exit status 10
Errors were encountered while processing:
bcmwl-kernel-source
E: Sub-process /usr/bin/dpkg returned an error code (1)
Same happens with all the broad broadcom-sta-dkms and all the other broadcom-sta-*
packages too (I tried installing them from source and from deb).
I always get this error in some form of telling me the 5.11 Kernel is not supported.
I own/have this problem with a ASUS PCE-AC68 network card btw (here the Chip ID (I think?): 14e4:43a0).
I don't know how to fix this problem without downgrading to Pop_OS 20.04 again. And it seems like just starting from scratch with a new install seems easier, I just really hope somebody can help me out here :/
