[bug #60848] GRUB freezes immediately afted boot menu apears (observed on HP Spectre x360 15)

[Roberto Hradec]

Follow-up Comment #1, bug #60848 (project grub):


[comment #0 original submission:]
> After sucesgull OS installation notebook does not boot. It freezes
immediately after the  GRUB menu  (i.e. boot bethod selection) appears. Even
the counter of seconds stops, but it is still seingh on the screen. The GRUB
menu doesn't react to any key.

I'm seeing this same behavior with GRUB EFI being loaded by UEFI PXE Netboot
on a Gigabyte GA-B75N motherboard. 
I've tried the latest 2.06 tag, and the latest 2.11 version from master git,
with the same results. 

Loading grub using Legacy Bios Mode PXE works perfectly, without freezing. 

But when loading from UEFI PXE, it freezes the moment the menu shows up, and
the timer doesn't change. 

The machine doesn't even respond to crtl+alt+del. 

If I set the menu timeout to 0 (essentially disabling the menu), grub works
perfectly and boots whatever menu option I leave as default without problem. 

I tried setting some "sleep" commands in the grub.cfg, and it does wait and
continues without problem. 

It's just when it shows the menu and waits for the timeout/key input that grub
freezes. 



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