petit problème avec le bluetooth, , j'avais un noyau 4.18.12, je mets a jour le noyau avec la version 4.18.14-041814-generic et ça me répond :
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Cannot upgrade Secure Boot enforcement policy due to unsigned kernels │
│ │
│ Your system has UEFI Secure Boot enabled in firmware, and the following │
│ kernels present on your system are unsigned: │
│ │
│ 4.18.14-041814-generic │
│ │
│ │
│ These kernels cannot be verified under Secure Boot. To ensure your │
│ system remains bootable, GRUB will not be upgraded on your disk until │
│ these kernels are removed or replaced with signed kernels.
Merci