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Adam01

Member

Registered: 2021-05-16

Posts: 3

No wifi after a Kernel downgrade

Hello,

I have downgraded my linux and linux-headers package with the commande line:

sudo downgrade linux

and then

sudo downgrade linux-headers

But now my wifi card is not working anymore.

If I try to downgrade the package broadcom-wl it propose the same versions without specifying the kernel version for which it works.

[adam@adam-macbookpro54 ~]$ sudo downgrade broadcom-wl
Available packages:

     1)  broadcom-wl    6.30.223.271   71  x86_64  (remote)
     2)  broadcom-wl    6.30.223.271   72  x86_64  (remote)
     3)  broadcom-wl    6.30.223.271   73  x86_64  (remote)
     4)  broadcom-wl    6.30.223.271   74  x86_64  (remote)
     5)  broadcom-wl    6.30.223.271   75  x86_64  (remote)
     6)  broadcom-wl    6.30.223.271   76  x86_64  (remote)
     7)  broadcom-wl    6.30.223.271   77  x86_64  (remote)
     8)  broadcom-wl    6.30.223.271   78  x86_64  (remote)
     9)  broadcom-wl    6.30.223.271   79  x86_64  (remote)
    10)  broadcom-wl    6.30.223.271   80  x86_64  (remote)
    11)  broadcom-wl    6.30.223.271   81  x86_64  (remote)
    12)  broadcom-wl    6.30.223.271   82  x86_64  (remote)
    13)  broadcom-wl    6.30.223.271   83  x86_64  (remote)
    14)  broadcom-wl    6.30.223.271   84  x86_64  (remote)
    15)  broadcom-wl    6.30.223.271   85  x86_64  (remote)
    16)  broadcom-wl    6.30.223.271   86  x86_64  (remote)
    17)  broadcom-wl    6.30.223.271   87  x86_64  (remote)
    18)  broadcom-wl    6.30.223.271   88  x86_64  (remote)

etc...

Which I should use?

Thanks,
Vincent.

Last edited by Adam01 (2021-05-16 18:52:27)

V1del

Forum Moderator

Registered: 2012-10-16

Posts: 25,230

Re: No wifi after a Kernel downgrade

You probably want to use broadcom-wl-dkms instead so that you don't have to deal with this each time you want to change your kernel version

If you don't want to do that you need to pick the specific rebuild that corresponds to the kernel version, since you didn't mention which that is it could be any single one of them, use the changelog to help you.

Last edited by V1del (2021-05-16 18:56:42)

Adam01

Member

Registered: 2021-05-16

Posts: 3

Re: No wifi after a Kernel downgrade

Perfect, it's working fine. I removed broadcam-wl and then installed broadcam-wl-dkms.

I guess wl means wireless, but no clue what means dkms!

Thank you.

progandy

Member

Registered: 2012-05-17

Posts: 5,317

Re: No wifi after a Kernel downgrade

broadcom was very creative and called their wireless driver "wl",
and dkms would be Dynamic Kernel Module Support

Last edited by progandy (2021-05-16 20:05:38)

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