A friend of mine has got a dual-boot PC with Ubuntu and Windows. When he starts his PC, the GRUB bootloader presents a menu that offers the choice between Ubuntu (the default) and Windows. Last weekend we produced a bootable USB stick with Manjaro Linux and started Manjaro Linux from the stick. We did not install Manjaro.
However, after that trial the GRUB menu - the choice between Ubuntu an Windows does not appear any longer. Windows will boot and nothing else. Whatever we try to configure in BIOS (UEFI or legacy boot) - only Windows will start. So, due to this trial Manjaro boot my friend’s PC now has got a functional Ubuntu that cannot be booted!
What happened? I believed that a trial boot from stick does not cause any change of the hard disk.
Moreover I fear that this topic might fall between the cracks between Ubuntu and the Manjaro,
i.e. Ubuntu community might send me to the Manjaro community to obtain help and vice versa.
What can the Manjaro community propose to overcome the boot obstacle?
Only thing that I can even imagine is the boot priority of the UEFI Bootloader has been changed due you boot from a USB device. Change it back to boot the grub bootloader of Ubuntu first.
nothing form manjaro community , but you need more explanation :
booting on USB live iso manjaro required Secureboot , fastboot , csm and legacy off.
so a this time , your UEFI motherboard does not change something ,
but on retry for Ubuntu , or Windows ( activate secure keys and so on )
I understand that the isssue concerns Ubuntu, however, part of my astonishment concerns Manjaro:
If I boot on a PC a trial Manjaro from a stick, nothing should have chanǵed on that PC after removal of the stick. However, in the case I just experienced, something did change on my friend’s PC: the usual boot process with the appearance of the GRUB menu does not work anymore.
As long as you did not change anything to boot from the stick and unmounted the file system properly before removing the stick there is zero reason that your issue is linked to the live Manjaro ISO as it won’t mount any partition by its own.
Again, this is no issue linked to Manjaro, better ask in a Ubuntu forum or get in contact to Windoze support.
