GRUB skipped sometimes












0















Dell xps 15 inch 9570. Dual boot Windows 10 and Ubuntu 18.04.1. I noticed that when I reboot with one external USB drive (WDBook 3T, 3 NTFS partitions and 1 ext4 partition) plugged in, the computer skips GRUB and boot directly to Windows 10. If I unplug the ext USB drive, reboot goes normally to GRUB.



Why is this and how can I fix it?










share|improve this question

























  • Sounds like there is a bootloader installed on the external drive, though I'm not sure how to fix it. The least effort solution might be to rearrange your boot options in the firmware settings.

    – wjandrea
    Jan 19 at 23:12











  • I'm not sure how to rearrange boot options, though. My work around is unplug the usb if I need to boot to ubuntu and plug it back in after booted. But a permanent solution is certainly appreciated.

    – Guangliang
    Jan 19 at 23:15








  • 1





    This might be useful: How to get rid of grub boot loader from external HDD - Super User

    – wjandrea
    Jan 19 at 23:27
















0















Dell xps 15 inch 9570. Dual boot Windows 10 and Ubuntu 18.04.1. I noticed that when I reboot with one external USB drive (WDBook 3T, 3 NTFS partitions and 1 ext4 partition) plugged in, the computer skips GRUB and boot directly to Windows 10. If I unplug the ext USB drive, reboot goes normally to GRUB.



Why is this and how can I fix it?










share|improve this question

























  • Sounds like there is a bootloader installed on the external drive, though I'm not sure how to fix it. The least effort solution might be to rearrange your boot options in the firmware settings.

    – wjandrea
    Jan 19 at 23:12











  • I'm not sure how to rearrange boot options, though. My work around is unplug the usb if I need to boot to ubuntu and plug it back in after booted. But a permanent solution is certainly appreciated.

    – Guangliang
    Jan 19 at 23:15








  • 1





    This might be useful: How to get rid of grub boot loader from external HDD - Super User

    – wjandrea
    Jan 19 at 23:27














0












0








0








Dell xps 15 inch 9570. Dual boot Windows 10 and Ubuntu 18.04.1. I noticed that when I reboot with one external USB drive (WDBook 3T, 3 NTFS partitions and 1 ext4 partition) plugged in, the computer skips GRUB and boot directly to Windows 10. If I unplug the ext USB drive, reboot goes normally to GRUB.



Why is this and how can I fix it?










share|improve this question
















Dell xps 15 inch 9570. Dual boot Windows 10 and Ubuntu 18.04.1. I noticed that when I reboot with one external USB drive (WDBook 3T, 3 NTFS partitions and 1 ext4 partition) plugged in, the computer skips GRUB and boot directly to Windows 10. If I unplug the ext USB drive, reboot goes normally to GRUB.



Why is this and how can I fix it?







boot dual-boot grub2






share|improve this question















share|improve this question













share|improve this question




share|improve this question








edited Jan 20 at 4:13









Codito ergo sum

1,5023825




1,5023825










asked Jan 19 at 23:04









GuangliangGuangliang

1013




1013













  • Sounds like there is a bootloader installed on the external drive, though I'm not sure how to fix it. The least effort solution might be to rearrange your boot options in the firmware settings.

    – wjandrea
    Jan 19 at 23:12











  • I'm not sure how to rearrange boot options, though. My work around is unplug the usb if I need to boot to ubuntu and plug it back in after booted. But a permanent solution is certainly appreciated.

    – Guangliang
    Jan 19 at 23:15








  • 1





    This might be useful: How to get rid of grub boot loader from external HDD - Super User

    – wjandrea
    Jan 19 at 23:27



















  • Sounds like there is a bootloader installed on the external drive, though I'm not sure how to fix it. The least effort solution might be to rearrange your boot options in the firmware settings.

    – wjandrea
    Jan 19 at 23:12











  • I'm not sure how to rearrange boot options, though. My work around is unplug the usb if I need to boot to ubuntu and plug it back in after booted. But a permanent solution is certainly appreciated.

    – Guangliang
    Jan 19 at 23:15








  • 1





    This might be useful: How to get rid of grub boot loader from external HDD - Super User

    – wjandrea
    Jan 19 at 23:27

















Sounds like there is a bootloader installed on the external drive, though I'm not sure how to fix it. The least effort solution might be to rearrange your boot options in the firmware settings.

– wjandrea
Jan 19 at 23:12





Sounds like there is a bootloader installed on the external drive, though I'm not sure how to fix it. The least effort solution might be to rearrange your boot options in the firmware settings.

– wjandrea
Jan 19 at 23:12













I'm not sure how to rearrange boot options, though. My work around is unplug the usb if I need to boot to ubuntu and plug it back in after booted. But a permanent solution is certainly appreciated.

– Guangliang
Jan 19 at 23:15







I'm not sure how to rearrange boot options, though. My work around is unplug the usb if I need to boot to ubuntu and plug it back in after booted. But a permanent solution is certainly appreciated.

– Guangliang
Jan 19 at 23:15






1




1





This might be useful: How to get rid of grub boot loader from external HDD - Super User

– wjandrea
Jan 19 at 23:27





This might be useful: How to get rid of grub boot loader from external HDD - Super User

– wjandrea
Jan 19 at 23:27










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