How to switch between installed kernel and developed kernel

[Aruna Hewapathirane]

<snip>

> update-initramfs: Generating /boot/initrd.img-5.12.0-rc3-GIDI_DEV+
> dpkg: warning: version '5.12.0-rc3-GIDI_DEV+' has bad syntax: invalid
> character in revision number
> dpkg: warning: version '5.12.0-rc3-GIDI_DEV+' has bad syntax: invalid
> character in revision number
>
 <snip>

This is a standard warning, arising because the version contains an
underscore, which is against Debian Policy.
Remove the underscore and retry :-)

Try CONFIG_LOCALVERSION="-GIDI-DEV"

Good luck - Aruna
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