[vivid] Shutdown and reboot stuck on "synchronizing SCSI cache"

[Marek Jędrzejewski]

When shutting down or rebooting the system either through interface or console it hangs on "Synchronizing SCSI cache" and "Stopping disk" following it. I am not able to switch console or reboot by ctrl+alt+del. I can only shutdown or restart by hardware buttons.

[Marek Jędrzejewski (slomianowlosy)]

It may be the same thing causing this:
When trying to suspend (using either keyboard suspend key or suspend shell extesnion) computer is stuck in the same manner (but instead of synchronizing scsi cache i can see "Suspending console(s). Use no_console_suspend to debug"), except I can switch consoles witch ctrl+alt+F[x], though they are useless, since it only shows blinking

[Artem.Kustikov (kustikoff)]

Same situation, Lenovo z51-70, Ubuntu 15.10 freezing on "Synchronizing SCSI cache" without ablity to ctrl+alt+F[x] and Ctrl-Alt-Del

[Artem (artem80)]

Same situation. HP 530, Ubuntu 15.10. Freezing on "Synchronizing SCSI cache" or "Stopping disk" without ablity to ctrl+alt+F[x] and Ctrl-Alt-Del.