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Bug#986387: cdrom: Unsuccessful installation on Windows10-Dell-Latitude-Ultrabook. No grub.

Hi enno,

On Mon, Apr 05, 2021 at 12:37:11AM +0200, enno wrote:
>Package: cdrom
>Severity: important
>Jigdone a debian-10.9.0-amd64-xfce-CD1 USB-Stick.  Booted a Dell Latitude
>Ultrabook with preinstalled Windows 10 from aforesaid USB-Stick.  Performed
>full installation including resizing the NTFS partition and including
>installation of grub(2).  Rebooted.  No bootable media found.
>On reboot via F12 I could select Windows Boot Manager to boot successfully into
>Windows10.  But Grub or Linux are not available.
>Windows10 recognises the resize of the NTFS partition, the
>additional partitions sda4 (root) and sda5 (swap) are recognised as well.
>UEFI booting presents a "normal" Windows 10.
>Legacy booting says, no bootable media found.
>Booting via UEFI-->Windows Bootmanager boots Windows 10.
>Legacy AND UEFI booting Installation-USB-Stick work up to the point to
>register the disk(s), and there it stops, it doesn't seem to recognise the
>partition table, that the installer has written and is also reported by
>It just presents an unformatted disk of MAX units to go on with.  But Windows
>DatentrÀgerverwaltung does indeed see the created partitions.
>I'm at a loss.

Hmmm. Curious on a few things. Did you boot the installer initially in
CSM or BIOS mode? How is the BIOS/firmware on your machine configured
in terms of booting? Is it set up to boot UEFI only? I'm worried that
your system is normally only configured to use UEFI, but you've
started the installer in BIOS mode and that has caaused your problems.

Another issue that sometimes hits users on Dell laptops is the disk
controller setup. They're quite often set up by default in "RAID"
mode, and you may need to switch to "AHCI" to allow Linux to work

Steve McIntyre, Cambridge, UK.                                steve@einval.com
"Yes, of course duct tape works in a near-vacuum. Duct tape works
 anywhere. Duct tape is magic and should be worshipped."
   -― Andy Weir, "The Martian"

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