Probook 6560b always boots Windows 10 64bit

[dgs3]

The guide you just posted above seems a bit hard to follow.  Are solutions A, B, C, D and E separate guides?  Or are they supposed to be done together?

I tried the bcdedit solution, and it still the machine booted windows straight away.

The efibootmgr solution didn't work either.

All the other solutions seem like rehashes of the "overwrite windows bootloader with your own bootloader", which doesn't really work since windows will eventually overwrite that with its own.

I just noticed that the initial boot splash screen shows twice, first it shows the splash screen then a blinking cursor line.  Then the boot splash screen shows a second time and boots into windows.  Is that indicative of anything?

Also, do you have a manifest of machines that exhibit this issue?

Thanks for all your help!

[Star_Fox]

Setup a Probook 650 G1 as test unit. 

1. Set boot order to UEFI native boot

2. Run Gparted to created partitions

3. Installed Ubuntu

4. Installed Windows 10

5. Disabled fastboot in Windows

6. The notebook is no longer boot into Ubuntu and no GRUB

7. Installed Ubuntu again on top of previous Ubuntu.

8. The GRUB is back and able to make selection

9. Installed Windows updates and restart the unit

10. The unit still boot to GRUB

[dgs3]

Can you attempt to repro on the machine I'm having trouble with?  I've tested this on several HP machines, and I've been able to repro on a Probook 6460b, Probook 6560b and HP Elitebook 8460p.

Also, due to some project constraints, I need to install linux after windows has already been installed.  I'm not sure if that'll have any bearing on the issue at hand.

[Star_Fox]

I don't have 6460b, 6560b or 8460p. I do have a 6460w workstation.

When you installed the Windows 10 are you using UEFI boot or legacy boot?

GPT partition or MBR partition?

[dgs3]

I am using UEFI boot for both windows and linux.  My partition table is GPT (with a protected MBR).

[Star_Fox]

I will test on a 8460w workstation.

[dgs3]

Awesome.   Hopefull you'll be able to repor.

Thanks for all your help!

[Star_Fox]

The test result.

8460w workstation

Enabled UEFI boot

The notebook failed to boot from USB flash drive (created for GPT partition scheme for UEFI)

MBR partitions

Installed Windows 10 first

Installed Ubuntu 15 (Select installed Ubuntu alongside Windows 10)

See the GRUB and able to select OS

Restarts notebook several times no issue found

I had tested on GPT partitions when I use Probook 650 G1 and no issue found.

[dgs3]

Did you let windows update?  In my experience, the windows update will forcibly install its own bootloader, overwriting GRUB and causing the HP machine to constantly boot into windows.

[Star_Fox]

on GPT partitions, ran Windows updates and Linux updates, no changes.

Will test MBR partitions tomorrow but don't think will make any different.