Dual boot: either no bcd, or no grub
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I installed Ubuntu 18.10 alongside Windows 10.
When I boot, I see grub, and I can boot into Ubuntu.
But if I choose Windows from the grub menu, I get an error message saying that BCD is missing.
Now, I can fix that with my Macrium Reflect CD, if I boot it EFI (my AMI BIOS is very temperamental about booting removable media as EFI). It fixes Windows, but then, grub is gone, and the only way I can get to Ubuntu is by manually selecting it in BIOS.
I tried running boot-repair. When I run it from my Ubuntu installation, it complains that I did not boot efi. If I run it from DVD, either my BIOS fails to boot it EFI, or it fails to repair.
I tried changing BIOS from efi to legacy, but that didn't help much. Here is log:
http://paste.ubuntu.com/p/TmnmRTw7Vd/
dual-boot uefi
asked Nov 28 at 18:02
shmu
13
add a comment |
up vote
0
down vote
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I installed Ubuntu 18.10 alongside Windows 10.
When I boot, I see grub, and I can boot into Ubuntu.
But if I choose Windows from the grub menu, I get an error message saying that BCD is missing.
Now, I can fix that with my Macrium Reflect CD, if I boot it EFI (my AMI BIOS is very temperamental about booting removable media as EFI). It fixes Windows, but then, grub is gone, and the only way I can get to Ubuntu is by manually selecting it in BIOS.
I tried running boot-repair. When I run it from my Ubuntu installation, it complains that I did not boot efi. If I run it from DVD, either my BIOS fails to boot it EFI, or it fails to repair.
I tried changing BIOS from efi to legacy, but that didn't help much. Here is log:
http://paste.ubuntu.com/p/TmnmRTw7Vd/
dual-boot uefi
asked Nov 28 at 18:02
shmu
13
Windows is in UEFI boot mode & Ubuntu is in BIOS boot mode. But you do not show a Windows boot entry in UEFI. Best to only boot in UEFI mode and convert Ubuntu/grub to UEFI (using Boot-Repair in UEFI mode). Check that UEFI Secure boot is off. And Windows fast start up is off. From live installer this will add Windows UEFI entry:sudo efibootmgr -c -L "Windows Boot Manager" -l "EFIMicrosoftBootbootmgfw.efi" -d /dev/sda -p 2or use your Windows repair console to fix.
– oldfred
Nov 28 at 19:11
Thanks. Please tell how to fix from Windows, because my BIOS won't let me boot UEFI to Ubuntu from removable media.
– shmu
Nov 29 at 5:10
I discovered an interesting workaround: I added Macrium Reflect rescue environment to the Windows boot menu, which automatically adds also the Windows recovery options -- in which I can choose to boot from hard disk, and that takes me straight to grub, and from there I am booted into Ubuntu, no questions asked.
– shmu
Nov 29 at 7:00
I succeeded in EUFI boot from flash drive, by renaming a file in it. "I went into the folder EFI BOOT and renamed the file grubx64.efi to mmx64.efi Reboot the machine and it should work. Hope that helps." askubuntu.com/questions/1085550/… Then, boot-repair running from Ubuntu on flash drive was able to fix it.
– shmu
Nov 30 at 5:52
add a comment |
up vote
0
down vote
favorite
up vote
0
down vote
favorite
I installed Ubuntu 18.10 alongside Windows 10.
When I boot, I see grub, and I can boot into Ubuntu.
But if I choose Windows from the grub menu, I get an error message saying that BCD is missing.
Now, I can fix that with my Macrium Reflect CD, if I boot it EFI (my AMI BIOS is very temperamental about booting removable media as EFI). It fixes Windows, but then, grub is gone, and the only way I can get to Ubuntu is by manually selecting it in BIOS.
I tried running boot-repair. When I run it from my Ubuntu installation, it complains that I did not boot efi. If I run it from DVD, either my BIOS fails to boot it EFI, or it fails to repair.
I tried changing BIOS from efi to legacy, but that didn't help much. Here is log:
http://paste.ubuntu.com/p/TmnmRTw7Vd/
dual-boot uefi
asked Nov 28 at 18:02
shmu
13
I installed Ubuntu 18.10 alongside Windows 10.
When I boot, I see grub, and I can boot into Ubuntu.
But if I choose Windows from the grub menu, I get an error message saying that BCD is missing.
Now, I can fix that with my Macrium Reflect CD, if I boot it EFI (my AMI BIOS is very temperamental about booting removable media as EFI). It fixes Windows, but then, grub is gone, and the only way I can get to Ubuntu is by manually selecting it in BIOS.
I tried running boot-repair. When I run it from my Ubuntu installation, it complains that I did not boot efi. If I run it from DVD, either my BIOS fails to boot it EFI, or it fails to repair.
I tried changing BIOS from efi to legacy, but that didn't help much. Here is log:
http://paste.ubuntu.com/p/TmnmRTw7Vd/
dual-boot uefi
dual-boot uefi
asked Nov 28 at 18:02
shmu
13
asked Nov 28 at 18:02
shmu
13
asked Nov 28 at 18:02
shmu
13
asked Nov 28 at 18:02
shmu
13
asked Nov 28 at 18:02
shmu
13
13
Windows is in UEFI boot mode & Ubuntu is in BIOS boot mode. But you do not show a Windows boot entry in UEFI. Best to only boot in UEFI mode and convert Ubuntu/grub to UEFI (using Boot-Repair in UEFI mode). Check that UEFI Secure boot is off. And Windows fast start up is off. From live installer this will add Windows UEFI entry:sudo efibootmgr -c -L "Windows Boot Manager" -l "EFIMicrosoftBootbootmgfw.efi" -d /dev/sda -p 2or use your Windows repair console to fix.
– oldfred
Nov 28 at 19:11
Thanks. Please tell how to fix from Windows, because my BIOS won't let me boot UEFI to Ubuntu from removable media.
– shmu
Nov 29 at 5:10
I discovered an interesting workaround: I added Macrium Reflect rescue environment to the Windows boot menu, which automatically adds also the Windows recovery options -- in which I can choose to boot from hard disk, and that takes me straight to grub, and from there I am booted into Ubuntu, no questions asked.
– shmu
Nov 29 at 7:00
I succeeded in EUFI boot from flash drive, by renaming a file in it. "I went into the folder EFI BOOT and renamed the file grubx64.efi to mmx64.efi Reboot the machine and it should work. Hope that helps." askubuntu.com/questions/1085550/… Then, boot-repair running from Ubuntu on flash drive was able to fix it.
– shmu
Nov 30 at 5:52
add a comment |
Windows is in UEFI boot mode & Ubuntu is in BIOS boot mode. But you do not show a Windows boot entry in UEFI. Best to only boot in UEFI mode and convert Ubuntu/grub to UEFI (using Boot-Repair in UEFI mode). Check that UEFI Secure boot is off. And Windows fast start up is off. From live installer this will add Windows UEFI entry:sudo efibootmgr -c -L "Windows Boot Manager" -l "EFIMicrosoftBootbootmgfw.efi" -d /dev/sda -p 2or use your Windows repair console to fix.
– oldfred
Nov 28 at 19:11
Thanks. Please tell how to fix from Windows, because my BIOS won't let me boot UEFI to Ubuntu from removable media.
– shmu
Nov 29 at 5:10
I discovered an interesting workaround: I added Macrium Reflect rescue environment to the Windows boot menu, which automatically adds also the Windows recovery options -- in which I can choose to boot from hard disk, and that takes me straight to grub, and from there I am booted into Ubuntu, no questions asked.
– shmu
Nov 29 at 7:00
I succeeded in EUFI boot from flash drive, by renaming a file in it. "I went into the folder EFI BOOT and renamed the file grubx64.efi to mmx64.efi Reboot the machine and it should work. Hope that helps." askubuntu.com/questions/1085550/… Then, boot-repair running from Ubuntu on flash drive was able to fix it.
– shmu
Nov 30 at 5:52
Windows is in UEFI boot mode & Ubuntu is in BIOS boot mode. But you do not show a Windows boot entry in UEFI. Best to only boot in UEFI mode and convert Ubuntu/grub to UEFI (using Boot-Repair in UEFI mode). Check that UEFI Secure boot is off. And Windows fast start up is off. From live installer this will add Windows UEFI entry:
sudo efibootmgr -c -L "Windows Boot Manager" -l "EFIMicrosoftBootbootmgfw.efi" -d /dev/sda -p 2 or use your Windows repair console to fix.– oldfred
Nov 28 at 19:11
Windows is in UEFI boot mode & Ubuntu is in BIOS boot mode. But you do not show a Windows boot entry in UEFI. Best to only boot in UEFI mode and convert Ubuntu/grub to UEFI (using Boot-Repair in UEFI mode). Check that UEFI Secure boot is off. And Windows fast start up is off. From live installer this will add Windows UEFI entry:
sudo efibootmgr -c -L "Windows Boot Manager" -l "EFIMicrosoftBootbootmgfw.efi" -d /dev/sda -p 2 or use your Windows repair console to fix.– oldfred
Nov 28 at 19:11
Thanks. Please tell how to fix from Windows, because my BIOS won't let me boot UEFI to Ubuntu from removable media.
– shmu
Nov 29 at 5:10
Thanks. Please tell how to fix from Windows, because my BIOS won't let me boot UEFI to Ubuntu from removable media.
– shmu
Nov 29 at 5:10
I discovered an interesting workaround: I added Macrium Reflect rescue environment to the Windows boot menu, which automatically adds also the Windows recovery options -- in which I can choose to boot from hard disk, and that takes me straight to grub, and from there I am booted into Ubuntu, no questions asked.
– shmu
Nov 29 at 7:00
I discovered an interesting workaround: I added Macrium Reflect rescue environment to the Windows boot menu, which automatically adds also the Windows recovery options -- in which I can choose to boot from hard disk, and that takes me straight to grub, and from there I am booted into Ubuntu, no questions asked.
– shmu
Nov 29 at 7:00
I succeeded in EUFI boot from flash drive, by renaming a file in it. "I went into the folder EFI BOOT and renamed the file grubx64.efi to mmx64.efi Reboot the machine and it should work. Hope that helps." askubuntu.com/questions/1085550/… Then, boot-repair running from Ubuntu on flash drive was able to fix it.
– shmu
Nov 30 at 5:52
I succeeded in EUFI boot from flash drive, by renaming a file in it. "I went into the folder EFI BOOT and renamed the file grubx64.efi to mmx64.efi Reboot the machine and it should work. Hope that helps." askubuntu.com/questions/1085550/… Then, boot-repair running from Ubuntu on flash drive was able to fix it.
– shmu
Nov 30 at 5:52
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Windows is in UEFI boot mode & Ubuntu is in BIOS boot mode. But you do not show a Windows boot entry in UEFI. Best to only boot in UEFI mode and convert Ubuntu/grub to UEFI (using Boot-Repair in UEFI mode). Check that UEFI Secure boot is off. And Windows fast start up is off. From live installer this will add Windows UEFI entry:
sudo efibootmgr -c -L "Windows Boot Manager" -l "EFIMicrosoftBootbootmgfw.efi" -d /dev/sda -p 2or use your Windows repair console to fix.– oldfred
Nov 28 at 19:11
Thanks. Please tell how to fix from Windows, because my BIOS won't let me boot UEFI to Ubuntu from removable media.
– shmu
Nov 29 at 5:10
I discovered an interesting workaround: I added Macrium Reflect rescue environment to the Windows boot menu, which automatically adds also the Windows recovery options -- in which I can choose to boot from hard disk, and that takes me straight to grub, and from there I am booted into Ubuntu, no questions asked.
– shmu
Nov 29 at 7:00
I succeeded in EUFI boot from flash drive, by renaming a file in it. "I went into the folder EFI BOOT and renamed the file grubx64.efi to mmx64.efi Reboot the machine and it should work. Hope that helps." askubuntu.com/questions/1085550/… Then, boot-repair running from Ubuntu on flash drive was able to fix it.
– shmu
Nov 30 at 5:52