Re: HP ProBook x360 11 G1 EE incompatible with grub

[Michel Bouissou]

Hi,

Le 15/12/2017 à 12:43, Thomas Schmitt a écrit :
> I am out of guesses. Everything points to something being missing or going
> wrong in GRUB.
> (I think the theory of intentionally blocking GRUB is fewly plausible
>  given the experiment results with SYSLINUX.)

I just made one test that clearly rules out any issue other than GRUB
itself (on said machine of course)

- On another UEFI HP machine, I booted from a Manjaro 17.0.6
https://manjaro.org/get-manjaro USB Key, an from this key, started a
"Normal Linux installation", but not to hard disk, to a 2nd USB key.

Once finished, I had a "standard" Linux UEFI install, using and UEFI
grub, all setup on the 2nd stick.

I tested this USB key on 2 machines where it would work perfectly.

But on the HP ProBook x360 11 G1 EE, it will not boot (symptoms as
usual: black screen with cursor, game over)

Then, I booted the key on a machine where it worked, and installed UEFI
Syslinux per
https://wiki.archlinux.org/index.php/Syslinux#Installation_on_UEFI , in
the default location - by putting syslinux files in EFI/BOOT, and its
binary in EFI/BOOT/bootx64.efi

I created the config file per instructions, and could check THAT IT NOW
HAPPILY BOOTS INTO MANJARO, ON THE HP ProBook x360 11 G1 EE.

I can add that if I boot said machine from rEFInd with the stick that
contains BOTH grub and syslinux in its EFI partition, I can chain from
rEFInd into Syslinux then Manjaro properly, but chaining from rEFInd
into grub leads to the usual punishment.

So now, I can tell being 100% sure, that on the HP ProBook x360 11 G1
EE, grub hangs the machine.

As a curious counter-example, on an HP Pavilion X2 Detachable
(V4N31EA#ABF) grub works perfectly, but syslinux not : On this machine,
the syslinux menu shows, it says it loads kernel and initrd, then sits
there forever, not actually starting Linux.

So there's definitely something extremely weird in HP UEFI's world...

Best regards.

-- 
Michel Bouissou <address@hidden> OpenPGP ID 0xEB04D09C