I have no /var/log/messages or dmesg | tail because the laptop won't boot into Debian Buster at all.I managed to use Debian Xfce 10.2 Live Non-Free Firmwares USB Stick. More information is given below:user@debian:~$ sudo fdisk -l
Disk /dev/sda: 238.5 GiB, 256060514304 bytes, 500118192 sectors
Disk model: INTEL SSDSCKKF25
Units: sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disklabel type: gpt
Disk identifier: C88E769C-28A4-4F5B-9BF2-C20843BF3120
Device Start End Sectors Size Type
/dev/sda1 2048 534527 532480 260M EFI System
/dev/sda2 534528 567295 32768 16M Microsoft reserved
/dev/sda3 567296 498069503 497502208 237.2G Microsoft basic data
/dev/sda4 498069504 500117503 2048000 1000M Windows recovery environment
Disk /dev/sdb: 931.5 GiB, 1000204885504 bytes, 1953525167 sectors
Disk model: Expansion
Units: sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 4096 bytes
I/O size (minimum/optimal): 4096 bytes / 4096 bytes
Disklabel type: gpt
Disk identifier: F4086DD7-3948-44C9-A568-3983799F9420
Device Start End Sectors Size Type
/dev/sdb1 2048 4095 2048 1M BIOS boot
/dev/sdb2 4096 58597375 58593280 28G Linux filesystem
/dev/sdb3 58597376 65458175 6860800 3.3G Linux swap
/dev/sdb4 65458176 1083490303 1018032128 485.4G Linux filesystem
/dev/sdb5 1083490304 1953523711 870033408 414.9G Microsoft basic data
Disk /dev/sdc: 28.8 GiB, 30943995904 bytes, 60437492 sectors
Disk model: DataTraveler 3.0
Units: sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disklabel type: dos
Disk identifier: 0x2bfbca39
Device Boot Start End Sectors Size Id Type
/dev/sdc1 * 2048 60437491 60435444 28.8G c W95 FAT32 (LBA)
Disk /dev/loop0: 2.3 GiB, 2510594048 bytes, 4903504 sectors
Units: sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytesuser@debian:~$
cat fstab# /etc/fstab: static file system information.
#
# Use 'blkid' to print the universally unique identifier for a
# device; this may be used with UUID= as a more robust way to name devices
# that works even if disks are added and removed. See fstab(5).
#
# <file system> <mount point> <type> <options> <dump> <pass>
# / was on /dev/sdb2 during installation
UUID=673a0bbc-3b77-4f7a-bd24-8fbe85112fef / ext4 errors=remount-ro 0 1
# /home was on /dev/sdb4 during installation
UUID=fdd6143f-b410-473c-acca-779b7a0783d4 /home ext4 defaults 0 2
# swap was on /dev/sdb3 during installation
UUID=0185056f-3fee-4269-b59c-7188410d7133 none swap sw 0 0Thank you.Sincerely yoursAdrian D'CostaOn Fri, Dec 20, 2019 at 6:28 PM Adrian D'Costa <adriandcosta1@gmail.com> wrote:I am trying to install Debian 10.2 XFCE DVD with non-free firmware.It says on the monitor everything has completed successfully. Now remove the removable media from which is the USB stick and boot into your new system.But the computer doesn't boot into newly installed Debian Buster.I have installed Grub in the MBR (Master Boot Record of Seagate's USB expansion drive).The Lenovo laptop is setup with the setup UEFI as UEFI and BIOS both, with BIOS first.Can anybody kindly tell me what I am doing wrong? Can anybody kindly point out where am I making the mistake?Shouldn't the computer load the MBR's Grub as I have pointed the boot order (first by pressing continuously F2 and changing Boot Priority and then Boot Option by pressing F12) to the Seagate USB expansion drive? Let me know if you need any information or setting info about installed Debian Buster's configuration.Thank you.P.S. For your information I previously installed Debian Squeezy's GRUB on to the same Seagate's MBR. But now I deleted all the partitions and used the guided automatic partitioning scheme that came with Buster and have a fresh install. I have turned off Secure Boot.