I've attached the requested fresh dmesg.txt. I'll be reverting the kernel to see if anything improves and will post back with the details.
As a side note, and its probably not related, I'm also seeing sporadic temporary lockups which seem to correspond with the CE: hpet3 warning in dmesg but even when disabling hpet at grub the lockups still occur but as I mentioned; probably not related. ** Attachment added: "dmesg.txt" https://bugs.launchpad.net/ubuntu/+bug/1867405/+attachment/5337012/+files/dmesg.txt -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1867405 Title: gdm3 loads very slowly with newer kernels To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+bug/1867405/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs