/boot gets full inspite of auto kernel removal

[Sabilon]

Describe the bug Conditions :

• An installed full disk encryption Linux Mint Cinnamon system
• "Remove obsolete kernels and dependencies" option is ON

Observed:

• /boots gets fulls on some kernel updates (Cinnamon displays a message about it)

Expected behavior:

• When "Remove obsolete kernels and dependencies" option is ON, it should free the user from manually tidying the /boot partition.

Suggestions:

• The Linux Mint installer should make a larger (x2 or x3) /boot partition for full disk encryption systems, so that the obsolete kernels removal automation manages to tidy /boot at a faster pace than kernel updates fill it up.
• Alternatively, should the kernel removal automation be more aggressive ? Should it be run after every kernel update, rather than every week ? Anyway when the system has manually installed kernels, this would probably not be enough to avoid that /boot fills up.
• Additionally, turn the kernel removal automation option ON by default (#696), so that manually tidying the /boot partition on full disk encryption systems would never be a thing for casual users.

Distribution:

• [x] Linux Mint, up-to-date 2021/04/27

[telemillevaches]

This bug prevents me to recommend encrypted Mint systems to non savvy users. IMHO it should be an easy fix with a big benefit.