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Background - I was originally trying to resolve the issue of Question - No audio in laptop speakers or headphones, but sound plays in screen (HDMI connection), I suspected kernel update and with the help from comments in Question - In the package logs, what are the kernel updates listed as?, I was able to discern kernel version I wanted to try booting into to see if the issue is resolved.

Right now, I have managed to install the kernels for specific version by installing appropriate linux-image(s) and the linux-header(s) only, but when I do boot using these kernels from the GRUB menu, the OS can not find my WiFi Adaptor, and for the sound it shows "Dummy Output". I installed 3 kernels on top of the existing one, and this issue is happening with them all.

Am I missing a crucial step or detail here?

Sunanda
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1 Answers1

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I have managed to install the kernels for specific version by installing appropriate linux-image(s) and the linux-header(s) only

In order to get the required kernel modules; that is drivers for wireless, ethernet and many more, you also needed to install linux-modules-xxx-generic as well as linux-modules-extra-xxx-generic, where xxx is the kernel version that you installed. Find out with the terminal command:

uname -r

It appears that this step was missed.

If you installed these kernels from the preferred Ubuntu repositories, you can go here and find the debs to install: https://packages.ubuntu.com/

If you installed these kernels from Ubuntu mainline, for example, here: https://kernel.ubuntu.com/~kernel-ppa/mainline/v5.6/ then you will notice that there is, in addition to linux-image and linux-headers, a package called linux-modules. Wireless, ethernet and many other drivers are included.

If you installed these kernels from some other source, please specify so that we may help you further.

chili555
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