I’ve found a few posts that seem to indicate you can upgrade as well as downgrade the kernel (and its dependent packages) by editing the /etc/apt/sources.list to point to the Ubuntu distribution you want (and then running update, upgrade, dist-upgrade commands). Not sure what the previous Ubuntu distribution name was for you, but this post, https://sypalo.com/how-to-upgrade-ubuntu, lists the distributions as,

While that post gives the example of *upgrading*, this post gives the example of *downgrading*, https://linuxconfig.org/how-to-downgrade-ubuntu-linux-system-to-its-previous-version, but I think they are essentially doing the same thing, i.e. it’s a function of the distribution name listed in /etc/apt/sources.list.

Note that even if you are downgrading the kernel, as far as the apt package manager is concerned you still have to run the various “upgrade” commands to change the distribution to a different one even if it is older.

On Oct 26, 2020, at 11:00, Rovai Antonin <Antonin.Rovai@erasme.ulb.ac.be> wrote:

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Dear experts,

I use to have a perfectly working freesurfer installation on my Ubuntu
18.04 LTS machine, until that doomsday where I installed updates as
recommended by ubuntu itself.

Now, each time I run freeview, I get the following error:

Aborted (core dumped)

I reinstalled freesurfer from scratch, fixing nothing.

I think Ubuntu did a kernel upgrade; now I have a uname -r output =
5.4.0-52-generic
I think it used to be 49 instead of 52 before the upgrade, but I am not
sure.

Do you know of any patch fixing this, by any chance?

Thanks for your lights

Antonin Rovai

Hôpital Erasme - ULB
Cliniques universitaires de Bruxelles
Route de Lennik 808 - B - 1070 Bruxelles
S www.erasme.ulb.ac.be

Disclaimer : http://www.erasme.ulb.ac.be/email-disclaimer

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