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Thread: Lost sound and internet suddenly

  1. #11
    Join Date
    May 2008
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    1,217
    Distro
    Ubuntu 20.04 Focal Fossa

    Re: Lost sound and internet suddenly

    Do you want to remove the troublesome kernels or change grub to persistently boot a different kernel?

  2. #12
    Join Date
    Sep 2009
    Location
    Pennsylvania
    Beans
    3,361
    Distro
    Xubuntu

    Re: Lost sound and internet suddenly

    Either way, I guess. It is just a pain to have to choose a kernel every time. I do switch to Win10 a few times a day for a game. Switching back to Xubuntu becomes a real pain then. I suppose that when they get a kernel to work that I will want to use the new kernel, but right now none of the 5.8 kernels work for me.

  3. #13
    Join Date
    May 2008
    Beans
    1,217
    Distro
    Ubuntu 20.04 Focal Fossa

    Re: Lost sound and internet suddenly

    This is the method I used 18 months ago when a kernel upgrade caused a very slow (2 minutes) boot process.

    Back up your existing grub and change the default kernel as follows:-
    Code:
    sudo nano /etc/default/grub
    Find this line:-
    Code:
    GRUB_DEFAULT=0
    Change to (for example):-
    Code:
    GRUB_DEFAULT=“1>2
    Save the file, exit and then:-
    Code:
    sudo update-grub
    Grub default is usually 0
    The 1 in blue is Advanced Options in 1st grub menu
    The 2 in red is the is 2nd kernel in list

    If you need the third kernel in the list then enter 3
    If you need the third kernel in the list then enter 4 etc etc.

    Previously, I left the troublesome kernels in place so that, when a repaired kernel became available, the auto update kicked in and I could check that it worked OK.

  4. #14
    Join Date
    Sep 2009
    Location
    Pennsylvania
    Beans
    3,361
    Distro
    Xubuntu

    Re: Lost sound and internet suddenly

    I am so sorry for making you type all of that. I should have told you that I have Xubuntu on a separate SSD from Win10. I choose which SSD to boot from when I power the machine on or restart it by hitting F11 and then choosing an SSD.

  5. #15
    Join Date
    May 2008
    Beans
    1,217
    Distro
    Ubuntu 20.04 Focal Fossa

    Re: Lost sound and internet suddenly

    That's OK - You can still adjust the grub in your Xubuntu SSD to automatically select a working kernel.

    I always isolate, de-activate or remove other drives (i.e. your Windows 10 drive) to avoid any unforeseen alteration to the other operating systems if changing grub.

    I've always preferred each OS on a separate drive because it is easy to boot from the UEFI boot screen.

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