Re: Grub hangs if no key is pressed

[Jürgen Bausa]

Some additional information and a workaround I found:

Grub is extremely slow. When I press a key, it takes more than 2 seconds 
before I see the result on the screen. Another information that might be 
important is that the Laptop has a high resolution (1920 x 1080) and grub 
makes use of this.

The workaround I found is to either use a textual grub screen           

        GRUB_TERMINAL=console
        GRUB_GFXPAYLOAD_LINUX=text

or to use a fixed and lower resolution like 

        GRUB_GFXMODE=800x600
or
        GRUB_GFXMODE=1024x768

Setting either a textual screen or the fixed resolution solves the problem: 
grub is more responsive and starting the default kernel via timeout works.

As this is only a workaround and grub should work without it, I am still 
interested in a solution.

Regards,

Juergen

Am Mittwoch, 27. Dezember 2017, 22:22:16 CET schrieben Sie:
> I have a Xiaomi Air 12 with deiban stretch (amd64) installed. Grub
> (2.02~beta3-5) works in principle but I found out, that it hangs very often,
> if no key is pressed (timeout for selecting the boot option).
> 
> In this case the default option is correctly selected. Then, the screen is
> cleared, the name of the selected kernel is displayed and the message
> "loading initial ram disk". Then the screen gets black and nothing happens
> anymore. It seems that the system is never started (nothing is written to
> the logs).
> 
> If I select the default boot option by pressing <Enter> on the first grub
> screen, everything works fine and the system boots up normally.
> 
> I have no idea how to debug this. Is there a debug option for grub that
> enables some output on the screen?
> 
> Any other hints?
> 
> Regards,
> 
> Jürgen