There may be better ways to downgrade the kernel(?), but what I've done is re-install the previous 5.11 kernel:
sudo apt install linux-image-5.11.0-46-generic linux- headers-5.11.0-46-generic linux-modules-extra-5.11.0-46-generic Then edit /etc/default/grub to change the GRUB_DEFAULT line to select this kernel by default: GRUB_DEFAULT="Advanced options for Ubuntu>Ubuntu, with Linux 5.11.0-46-generic" and then run `sudo update-grub` and reboot. Now `uname -r` shows 5.11.0-46-generic. This will lock you on that kernel forever (no security patches!). You should watch these launchpad bugs for changes to know when to undo it. Undo the change by returning /etc/default/grub to having `GRUB_DEFAULT=0` and re-running `sudo update-grub`. Once everything is back to normal you can then `apt purge` the packages above installed with `apt install`. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1958591 Title: [amdgpu] Random noise 'static' display after internal display turned off/on To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux-hwe-5.13/+bug/1958591/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
