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Thread: Install and Boot Windows 10 with UEFI and OpenSUSE with Legacy

  1. #1
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    Question Install and Boot Windows 10 with UEFI and OpenSUSE with Legacy

    For using Windows 10 at work and OpenSUSE at home with my laptop on real hardware, I intend to create two primary partitions on HDD: one for Windows 10 and the other for OpenSUSE.


    Observations:


    1. My laptop has secure boot enabled and it is not possible to disable it on Acer’s bios setup “InsydeH20”, so the Network CD/USB Stick only boots with Legacy.

    2. The product key is stored in BIOS and will be used automatically by Windows 10 when connected to the Internet, so activation isn’t a problem.

    3. lsblk shows that HDD’s size is 931.5G.


    Questions:


    1. Is it possible to install and boot Windows 10 with UEFI on one partition and OpenSUSE with Legacy on the other partition?

    2. If the answer for 1. is yes, then for using a web browser, a torrent client, video and music players, games that are not resource hungry, software of work and a VM on Windows 10 and for using the user interface "Desktop with KDE Plasma" of the installer, what is the recommended size for each partition?


    Thanks in advance!

  2. #2
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    Default Re: Install and Boot Windows 10 with UEFI and OpenSUSE with Legacy

    Hi
    Nope it's either UEFI or Legacy... so what model Acer, not a 32bit UEFI boot system is it? Can you not hit like esc, F2 or F12 to get to a boot menu and select boot medium?
    Cheers Malcolm °¿° SUSE Knowledge Partner (Linux Counter #276890)
    SUSE SLE, openSUSE Leap/Tumbleweed (x86_64) | GNOME DE
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    Default Re: Install and Boot Windows 10 with UEFI and OpenSUSE with Legacy


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    Default Re: Install and Boot Windows 10 with UEFI and OpenSUSE with Legacy

    Quote Originally Posted by pensador_13 View Post
    Hi
    From the user manual;
    To activate the BIOS utility, press F2 while the computer logo is being displayed.

    Boot sequence
    To set the boot sequence in the BIOS utility, activate the BIOS utility, then select Boot from the categories listed on the left of the screen.
    Pop in the install medium and see how it goes....?

    Also see this thread;
    https://community.acer.com/en/discus...blem-bios-1-25
    Cheers Malcolm °¿° SUSE Knowledge Partner (Linux Counter #276890)
    SUSE SLE, openSUSE Leap/Tumbleweed (x86_64) | GNOME DE
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    Default Re: Install and Boot Windows 10 with UEFI and OpenSUSE with Legacy

    Quote Originally Posted by malcolmlewis View Post
    Hi
    Can you not hit like esc, F2 or F12 to get to a boot menu and select boot medium?
    Yes I can.

    Being more detailed:

    I have one usb with Windows 10 installer and other with openSUSE network installer.
    Suppose that my HDD is divided in two parts and that I boot the Windows 10 installer on UEFI mode and install Windows 10 on one part, then I boot on Legacy mode and install OpenSUSE on the other part.

    Is it possible to boot the installed Windows 10 on UEFI mode and, when I want to use OpenSUSE, switch to Legacy mode and boot the installed openSUSE?

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    Default Re: Install and Boot Windows 10 with UEFI and OpenSUSE with Legacy

    P.S. It is possible to install the entire HDD with OpenSUSE on Legacy mode.

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    Default Re: Install and Boot Windows 10 with UEFI and OpenSUSE with Legacy

    Quote Originally Posted by pensador_13 View Post
    P.S. It is possible to install the entire HDD with OpenSUSE on Legacy mode.
    Hi
    If it boot's you should be able too. But no reason you can't boot both in UEFI mode. On the hdd you can set this up as type gpt and create a small UEFI boot partition separate from the windows system.

    Or is this just one big drive you want to share with openSUSE? If so then no since it will be of type gpt already, so only for use with UEFI booting...

    You can share the UEFI partition with windows fine, it just creates a directory for the uefi files, just make sure during the install you select the expert partitioner, rescan the drives and set the UEFI partition to not format and the mount point of /boot/efi.
    Cheers Malcolm °¿° SUSE Knowledge Partner (Linux Counter #276890)
    SUSE SLE, openSUSE Leap/Tumbleweed (x86_64) | GNOME DE
    If you find this post helpful and are logged into the web interface,
    please show your appreciation and click on the star below... Thanks!

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    Default Re: Install and Boot Windows 10 with UEFI and OpenSUSE with Legacy

    Quote Originally Posted by pensador_13 View Post
    Is it possible to boot the installed Windows 10 on UEFI mode and, when I want to use OpenSUSE, switch to Legacy mode and boot the installed openSUSE?
    Yes, it is possible. But it will be very tedious to keep switching between legacy and UEFI booting. Simpler will be to find a way to disable secure-boot, and install openSUSE with UEFI.

    It should be possible to install, with secure-boot still enabled. But apparently there is a limitation with some ACER computers. It still might be possible if you boot the installer from a USB, but first change one file on that USB.
    openSUSE Leap 15.3; KDE Plasma 5.18.6;

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    Default Re: Install and Boot Windows 10 with UEFI and OpenSUSE with Legacy

    Also you can use a single partition for openSUSE the default and recommended is 3 partitions ( root home and swap) best to provide free unpartitioned space and let the installer make the partitions.

    Both OS should use the same boot methods or you run into problems

  10. #10
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    Default Re: Install and Boot Windows 10 with UEFI and OpenSUSE with Legacy

    Quote Originally Posted by nrickert View Post
    Yes, it is possible. But it will be very tedious to keep switching between legacy and UEFI booting. Simpler will be to find a way to disable secure-boot, and install openSUSE with UEFI.
    But openSUSE installer should be bootable with secure boot.

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