Dual Boot Problems with Windows and Manjaro

[soundofthunder]

@Umbra_noctis

The bootprotokoll in Windows is activated. But the boot-loops are not listed. Whatever the reason is, it is between grub and the start of the bootprotokoll of Windows.

Using Google Translate bootprotokoll translates from German as “boot log”, or when the word is properly separated as boot protokoll, it translates as “boot protocol”.

In either case, this makes little sense - Could you please explain what you mean by “bootprotokoll” and “boot loops”?

The latter sounds like a breakfast cereal.

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@Umbra_noctis

Since the installation of Linux Windows starts with boot loops. If I shut down the Manjaro system and boot Windows the system reboots a few seconds after pressing enter in grub. Normaly the second start works. It does not matter if a have shut down Linux the day before or a few hours ago. The next few Win boots will show the problem.

If I am understanding your description properly – and I should mention your use of English is sometimes difficult to interpret – it could be that one OS is booting as UEFI and the other is not.

We can quickly test for each OS.

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Manjaro:

In Manjaro, please provide the output of the following command (enter it exactly as written) – it will print either UEFI or BIOS:

[ -d /sys/firmware/efi ] && echo UEFI || echo BIOS

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Windows:

In Windows, please open an administrative CMD/PowerShell prompt and enter the following command:

bcdedit

Look for PATH below the “Windows Boot Loader” section:

• If it contains \EFI\MICROSOFT\BOOT then Windows has booted as UEFI (preferred).
• If it contains \Windows\system32\winload.exe then Windows has booted using CSM (Legacy mode).

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Knowing that both Manjaro and Windows are booting as UEFI will rule out this possible cause.

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Note that both Manjaro and Windows are expected to boot with the same technology – either UEFI or BIOS – in order to co-exist efficiently; otherwise, Windows will force a reboot, which is what your description seems to imply.

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@Umbra_noctis

A more problematic variant sometimes occur when I have shuted down Windows with a program (eg Sleep timer Ultimate). Then the boot loop does not end. I have to press the power button boot Linux shut it down and reboot Windows. Logs and Halt on error ar enabled but the boot loop starts to early.

If this problem is a result of using “Sleep Timer Ultimate” on Windows, then I’m afraid it has nothing to do with Manjaro and no support should be offered.

All that can really be suggested in to uninstall “Sleep Timer Ultimate” and never use it again.

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However, one possible contributor might be that you have Windows Fast Startup enabled – this must be disabled when multi-booting with any flavour of Linux.

Note: Despite the popularity of multi-booting Linux and Windows, it is not a supported scenario.

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Disable Fast Startup:

In Windows, please open an administrative CMD/PowerShell prompt and enter the following command:

powercfg /h off

That’s it. Fast Startup should now be disabled.

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Regards.