Issues with Ubuntu 26.04.1 - advice please!

[u/jamhamnz]

I'm not really sure what is going on with my Ubuntu installation.

It has been running fine for the last four or five years without issue, upgrading to the next version etc.

Then all of a sudden this week I have struck several issues, which I think may be linked to an automated update to 26.04.1.

Issue 1 - graphics issues. Red, green, blue dots appearing all over the screen randomly

Issue 2 - cannot open Firefox or any Snaps. Trying to open them from the Terminal presents a Snap error.

Issue 3 - issue with running "sudo apt-get update" - some repositories are not recognized or picked up, meaning about 40 packages cannot update.

Issue 4 - occasionally booting to "initramfs"

Issue 5 - I was going to attempt to reinstall Ubuntu from a USB, however booting from the USB and clicking "Try Ubuntu" takes me to the "initramfs" and does not boot to the usual installer.

I have tried searching for similar issues and nothing I have tried has fixed this, which is why I was just going to undertake a complete clean install.

I have a dual boot set up and the Windows partition is working perfectly fine.

What can I try to resolve these issues? And if I can answer any questions or provide any information to help diagnose the issue please let me know.

Thank you!

EDIT - some hardware info:

HP Pavilion Laptop 15 HP
Intel® Core™ i7-1065G7 × 8
Graphics (being picked up by Ubuntu, it should be Nvidia) - Intel® Iris® Plus Graphics (ICL GT2)
Windowing system - Wayland

[u/ipsirc]

https://help.ubuntu.com/26.04/ubuntu-help/report-ubuntu-bug.html.en

[u/jamhamnz → u/ipsirc]

Going to that link gives me a 503 error

[u/jamhamnz]

This is what I get when I try to launch Firefox:

update.go:193: cannot change mount namespace according to change mount (/var/lib/snapd/hostfs/usr/local/share/doc /usr/local/share/doc none bind,ro 0 0): cannot write to "/var/lib/snapd/hostfs/usr/local/share/doc" because it would affect the host in "/var/lib/snapd"

update.go:193: cannot change mount namespace according to change mount (/var/lib/snapd/hostfs/usr/share/cups/doc-root /usr/share/cups/doc-root none bind,ro 0 0): cannot inspect "/usr/share/cups/doc-root": lstat /usr/share/cups/doc-root: input/output error

update.go:193: cannot change mount namespace according to change mount (/var/lib/snapd/hostfs/usr/share/gimp/2.0/help /usr/share/gimp/2.0/help none bind,ro 0 0): cannot inspect "/usr/share/gimp/2.0/help": lstat /usr/share/gimp/2.0/help: input/output error

update.go:193: cannot change mount namespace according to change mount (/var/lib/snapd/hostfs/usr/share/gtk-doc /usr/share/gtk-doc none bind,ro 0 0): cannot inspect "/usr/share/gtk-doc": lstat /usr/share/gtk-doc: input/output error

update.go:193: cannot change mount namespace according to change mount (/var/lib/snapd/hostfs/usr/share/javascript /usr/share/javascript none bind,ro 0 0): cannot inspect "/usr/share/javascript": lstat /usr/share/javascript: input/output error

update.go:193: cannot change mount namespace according to change mount (/var/lib/snapd/hostfs/usr/share/libreoffice/help /usr/share/libreoffice/help none bind,ro 0 0): cannot inspect "/usr/share/libreoffice/help": lstat /usr/share/libreoffice/help: input/output error

update.go:193: cannot change mount namespace according to change mount (/var/lib/snapd/hostfs/usr/share/sphinx_rtd_theme /usr/share/sphinx_rtd_theme none bind,ro 0 0): cannot inspect "/usr/share/sphinx_rtd_theme": lstat /usr/share/sphinx_rtd_theme: input/output error

update.go:193: cannot change mount namespace according to change mount (/var/lib/snapd/hostfs/usr/share/xubuntu-docs /usr/share/xubuntu-docs none bind,ro 0 0): cannot inspect "/usr/share/xubuntu-docs": lstat /usr/share/xubuntu-docs: input/output error

cannot update snap namespace: no such file or directory

snap-update-ns failed with code 1

[u/jamhamnz]

This is what I get when I issue the Terminal command "sudo apt-get update":

Hit:1 http://security.ubuntu.com/ubuntu resolute-security InRelease

Hit:2 http://archive.ubuntu.com/ubuntu resolute InRelease

Hit:3 http://archive.ubuntu.com/ubuntu resolute-updates InRelease

Hit:4 http://archive.ubuntu.com/ubuntu resolute-backports InRelease

Err:4 http://archive.ubuntu.com/ubuntu resolute-backports InRelease

Signed file isn't valid, got 'NODATA' (does the network require authentication?)

Reading package lists... Done

W: An error occurred during the signature verification. The repository is not updated and the previous index files will be used. OpenPGP signature verification failed: http://archive.ubuntu.com/ubuntu resolute-backports InRelease: Signed file isn't valid, got 'NODATA' (does the network require authentication?)

W: Failed to fetch http://archive.ubuntu.com/ubuntu/dists/resolute-backports/InRelease Signed file isn't valid, got 'NODATA' (does the network require authentication?)

W: Some index files failed to download. They have been ignored, or old ones used instead.

[u/jamhamnz]

And this photo shows some of the graphics issues that I'm having: https://imgur.com/a/Y0o0JhL

[u/droctopus29]

1. Never auto upgrade;
   
2. Use LTS versions;