On 01/08/2021 13:34, didier gaumet wrote: > Hello, > > Disclaimer: I have never tested what is following. > > Perhaps another way of keeping two kernels without increasing the size oft > the /boot partition would be to decrease the size of the initrd files: by > default they are built with allmost all possible modules, but they can be > built with only the modules that are needed (for the hardware which is > automatically detected). That is, if Ubuntu acts as Debian in this regard > (Debian here) > > As root or via sudo: > 1) edit the /etc/initramfs-tools/initramfs.conf file to replace the > MODULES=most line by a MODULES=dep one > 2) to make room in /boot for the following step, delete the big initrd images: > # rm /boot/initrd* > 3) generate smaller initrd images > # update-initramfs -c -k all > > Next time there is a kernel update, the initrd will automatically be > generated with a smaller size (but you will perhaps have to make room for it > if you have not enough space for three kernels)
Another avenue to try is changing the compression used. I see the OP uses lz4 compression, XZ and Zstd compression often give better results but this is definitely a "Your Mileage May Vary" situation. As with the "MODULES" option above, you can configure the compression with the "COMPRESS" option. >
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