This happens generally at power-off, not only at hibernation. I can reproduce it by booting with init=/bin/bash and running "poweroff -f". I am only changing the kernel. With 2.6.17 it turns quietly off every time, with 2.6.19 it makes the ugly sound almost every time.
** Summary changed: - hard drive cries out in pain at hibernation + hard drive cries out in pain at power-off ** Description changed: Just as the power goes off, a bad sound comes from my Compaq Presario 700 laptop, as if the hard drive (Samsung MP0804H) is pulling the - emergency brakes on. This came with .19. + emergency brakes on. This came with 2.6.19. I have something similar on an Acer TravelMate 8100, but here it came - with .17. + with 2.6.17. -- hard drive cries out in pain at power-off https://launchpad.net/bugs/72765 -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs