I attach three pictures, those show that newer kernel cannot find root device and than newer kernel really miss several important modules including "pata" driver (I emulated similar error in 5.3.0-28-generic by changing disk ID
** Attachment added: "5.3.0-40-generic cannot find root device" https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1869919/+attachment/5343877/+files/20200331_191146_5.3.0-40-generic-error.jpg -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1869919 Title: Kernel 5.3.0-40-generic cannot boot from PATA drive To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1869919/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs