The Ubuntu Kernels delivered with 22.04 malfunction with my wifi hardware.
I isolated the problem between the kernels :
ok - Mainline Kernel 5.15.4 which corresponds to the Ubuntu Kernel 5.15.0-12.12
nok - Mainline Kernel 5.15.5 which corresponds to the Ubuntu Kernel 5.15.0-13.13

Using the repository (master) at git://git.launchpad.net/~ubuntu-kernel-test/ubuntu/+source/linux/+git/mainline-crack
I can build successfully the commits pointed by the tags 5.15.4 and 5.15.5 but I can not bisect because the commits in between doesn't have the /debian directory.

Using the repository (master) at git://git.launchpad.net/~ubuntu-kernel/ubuntu/+source/linux/+git/jammy
I get errors at build like

  LD [M]  drivers/iio/industrialio.o
make[2]: Leaving directory '/jammy/debian/build/build-generic'
make[1]: *** [Makefile:219: __sub-make] Error 2
make[1]: Leaving directory '/jammy'
make: *** [debian/rules.d/2-binary-arch.mk:53: /jammy/debian/stamps/stamp-build-generic] Error 2

and I don't know how to find where and what triggers the errors.

In all cases for building I use

LANG=C fakeroot debian/rules clean
LANG=C fakeroot debian/rules binary-headers binary-generic binary-perarch

(following what is explained at wiki BuildYourOwnKernel and wiki KernelMaintenance )

This is related to : launchpad.net bug 1970965 and askubuntu 22-04-wifi-keeps-disconnecting-for-a-few-seconds-frequently



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