Comment 5 for bug 1813126

I can confirm similar behavior, but slightly different setup.

I installed 19.04 from scratch, and used the disk encryption with lvm option during setup.

Everything was working fine until upgrading to the latest kernel, 5.0.0-16-generic.

The previous kernel I had installed, 5.0.0-15-generic, still works fine.

I see no differences in the grub config for the 2 kernels:

 menuentry 'Ubuntu, with Linux 5.0.0-16-generic' --class ubuntu --class gnu-linux --class gnu --class os $menuentry_id_option 'gnulinux-5.0.0-16-generic-advanced-69cc3212-6aef-415d-a65d-30362fc514f6' {
  recordfail
  load_video
  gfxmode $linux_gfx_mode
  insmod gzio
  if [ x$grub_platform = xxen ]; then insmod xzio; insmod lzopio; fi
  insmod part_gpt
  insmod ext2
  if [ x$feature_platform_search_hint = xy ]; then
    search --no-floppy --fs-uuid --set=root 070883ed-c707-4199-b2b2-84145dc3355d
  else
    search --no-floppy --fs-uuid --set=root 070883ed-c707-4199-b2b2-84145dc3355d
  fi
  echo 'Loading Linux 5.0.0-16-generic ...'
  linux /vmlinuz-5.0.0-16-generic root=/dev/mapper/ubuntu--vg-root ro quiet splash $vt_handoff
  echo 'Loading initial ramdisk ...'
  initrd /initrd.img-5.0.0-16-generic
}

 menuentry 'Ubuntu, with Linux 5.0.0-15-generic' --class ubuntu --class gnu-linux --class gnu --class os $menuentry_id_option 'gnulinux-5.0.0-15-generic-advanced-69cc3212-6aef-415d-a65d-30362fc514f6' {
  recordfail
  load_video
  gfxmode $linux_gfx_mode
  insmod gzio
  if [ x$grub_platform = xxen ]; then insmod xzio; insmod lzopio; fi
  insmod part_gpt
  insmod ext2
  if [ x$feature_platform_search_hint = xy ]; then
    search --no-floppy --fs-uuid --set=root 070883ed-c707-4199-b2b2-84145dc3355d
  else
    search --no-floppy --fs-uuid --set=root 070883ed-c707-4199-b2b2-84145dc3355d
  fi
  echo 'Loading Linux 5.0.0-15-generic ...'
  linux /vmlinuz-5.0.0-15-generic root=/dev/mapper/ubuntu--vg-root ro quiet splash $vt_handoff
  echo 'Loading initial ramdisk ...'
  initrd /initrd.img-5.0.0-15-generic
 }