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Re: Grub hangs if no key is pressed

From: Narcis Garcia
Subject: Re: Grub hangs if no key is pressed
Date: Thu, 28 Dec 2017 21:38:02 +0100

Did you try with GRUB_GFXMODE=1920x1080 ?

El 28/12/17 a les 20:06, Jürgen Bausa ha escrit:
> 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
> 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
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