Grub не видит zorin 17 почему?

Question

[igor 9577]

Я не могу загрузить zorin 17 в меню grub его нет хотя команда sudo grub-update пишет:

sudo update-grub
[sudo] password for igor:
Sourcing file `/etc/default/grub'
Generating grub configuration file ...
Found linux image: /boot/vmlinuz-6.5.0-17-generic
Found initrd image: /boot/initrd.img-6.5.0-17-generic
Found linux image: /boot/vmlinuz-6.5.0-9-generic
Found initrd image: /boot/initrd.img-6.5.0-9-generic
Found memtest86+x64 image: /memtest86+x64.bin
Warning: os-prober will be executed to detect other bootable partitions.
Its output will be used to detect bootable binaries on them and create new boot entries.
Found Windows 10 on /dev/sdc1
Found Ubuntu 23.10 (23.10) on /dev/sdc11
Found Zorin OS 17 (17) on /dev/sdc5
Found Ubuntu 19.04 (19.04) on /dev/sdc7
Adding boot menu entry for UEFI Firmware Settings ...
done

а в меню не появляется(кстати на sdc5 в boot только директория grub и все).