Kernel 5.11.xx not booting, need to fallback to 5.8

[Ian Bruntlett]

Hi Robert,

On Sat, 5 Jun 2021 at 17:13, robert <robert at redcor.ch> wrote:

> Hi there
>
> I have a dell xps 17 with Ubuntu 21.04
>
> for some time now, I can not boot into the default kernal anymore, but
> have to
> use an older 5.8.xx kernel.
>
> I just get a small blinking cursor and the booting stops there ..
>
> can anybody of you give me an idea, how to fix that


I am not a GRUB or Kernel expert but I always enable the display of boot
time kernel messages.

To do that I:-
1. Edit  /etc/default/grub
2.  Copy the line GRUB_CMDLINE_LINUX_DEFAULT="quiet splash", changing it to
GRUB_CMDLINE_LINUX_DEFAULT=""
3. Put a # in front of the original line.
4. Run sudo update-grub

After that, you should get more messages when booting or shutting down your
computer.

Try booting your PC. Hopefully the last messages displayed on booting will
give an idea as to what is wrong.

HTH,


Ian

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