I’ve recently encountered this odd situation, where my laptop(UEFI-GPT) does not boot at times, rather shows the grub rescue screen with " unknown-filesystem" message. This only happens when I don’t select ‘manjaro’ from the Initial boot options menu (which can be triggered with esc). It boots fine and shows grub when ‘manjaro’ is selected from the mb boot options. And this ‘grub rescue’ problem does not occur always, Sometimes it does boot and shows the grub options screen[which is how it normally would, before the dec 2020 update].
I’m on a windows 10, manjaro KDE dual boot; On two separate hard drives, With the pre-existing "efi system partition" partition created by windows, acting as partition for “/boot/efi”. [manjaro installed on HDD, with “/boot/efi” on SSD, where windows is installed]
The ouput of sudo parted -l :
Model: ATA ST1000LM035-1RK1 (scsi)
Disk /dev/sda: 1000GB
Sector size (logical/physical): 512B/4096B
Partition Table: gpt
Disk Flags:
Number Start End Size File system Name Flags
1 1049kB 764GB 764GB ntfs Basic data partition msftdata
6 764GB 871GB 107GB ext4
2 871GB 925GB 53.7GB ext4
3 925GB 979GB 53.7GB ext4
4 979GB 986GB 7516MB linux-swap(v1) swap
5 986GB 1000GB 14.0GB fat32 Basic data partition msftdata
Model: WDC PC SN530 SDBPNPZ-256G-1002 (nvme)
Disk /dev/nvme0n1: 256GB
Sector size (logical/physical): 512B/512B
Partition Table: gpt
Disk Flags:
Number Start End Size File system Name Flags
1 1049kB 274MB 273MB fat32 EFI system partition boot, esp
2 274MB 290MB 16.8MB Microsoft reserved partition msftres
3 290MB 236GB 236GB ntfs Basic data partition msftdata
4 236GB 237GB 1363MB ntfs Basic data partition hidden, diag
5 237GB 256GB 18.8GB ntfs Basic data partition hidden, msftdata
Can anyone suggest a fix for this?