How do I uninstall dkms modules if there are two of them? - Ask Ubuntu

i have 2 dkms modules in same version:

$ dkms status rtl8812au, 4.3.14, 4.4.0-45-generic, x86_64: installed rtl8812au, 4.3.14, 4.4.0-47-generic, x86_64: installed 

when tried dkms uninstall -m rtl8812au -v 4.3.14 uninstalled second one. how uninstall first one? thanks!

you don't have 2 dkms modules. have one dkms module built two different kernel versions.

as rule of thumb shouldn't manually uninstall dkms modules kernels still installed unless have specific reason.

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if want uninstall module particular kernel, can refer dkms(8) manual:

-k <kernel-version>/<arch>

the kernel , arch perform action upon. can specify multiple kernel version/arch pairs on command line repeating -k argument different kernel version , arch. however, not actions support multiple kernel versions (it error out in case). arch part can omitted, , dkms assume want arch of running system.

so command uninstall module in question kernel 4.4.0-45-generic is:

dkms uninstall -k 4.4.0-45-generic rtl8812au 

you can omit module version since can't install multiple versions of module same kernel anyway.