I tried 1] systemctl poweroff
2] GRUB_CMDLINE_LINUX_DEFAULT="quiet" to quite splash acpi=force The syslog error is as below: Mar 19 20:04:36 debian kernel: [ 0.221101] ACPI Error: No handler for Region [CMS0] (ffff88026e048e00) [SystemCMOS] (20140424/evregion-163) Mar 19 20:04:36 debian kernel: [ 0.221104] ACPI Error: Region SystemCMOS (ID=5) has no handler (20140424/exfldio-297) Mar 19 20:04:36 debian kernel: [ 0.221106] ACPI Error: Method parse/execution failed [\_SB_.PCI0._INI] (Node ffff88026e04e8d8), AE_NOT_EXIST (20140424/psparse-536) Mar 19 20:04:36 debian kernel: [ 11.093996] EXT4-fs (sda4): re-mounted. Opts: errors=remount-ro Mar 19 20:04:36 debian lightdm[856]: ** (lightdm:856): WARNING **: Error getting user list from org.freedesktop.Accounts: GDBus.Error:org.freedesktop.DBus.Error.ServiceUnknown: The name org.freedesktop.Accounts was not provided by any .service files Mar 19 20:04:40 debian lightdm[856]: ** (process:902): WARNING **: Error getting user list from org.freedesktop.Accounts: GDBus.Error:org.freedesktop.DBus.Error.ServiceUnknown: The name org.freedesktop.Accounts was not provided by any .service files Mar 19 20:05:00 debian lightdm[856]: ** (process:987): WARNING **: Error getting user list from org.freedesktop.Accounts: GDBus.Error:org.freedesktop.DBus.Error.ServiceUnknown: The name org.freedesktop.Accounts was not provided by any .service files Mar 19 20:09:18 debian kernel: [ 300.212411] mce: [Hardware Error]: Machine check events logged Mar 19 20:42:35 debian org.a11y.atspi.Registry[978]: g_dbus_connection_real_closed: Remote peer vanished with error: Underlying GIOStream returned 0 bytes on an async read (g-io-error-quark, 0). Exiting. Mar 19 20:43:46 debian kernel: [ 0.237081] ACPI Error: No handler for Region [CMS0] (ffff88026e048e00) [SystemCMOS] (20140424/evregion-163) Mar 19 20:43:46 debian kernel: [ 0.237084] ACPI Error: Region SystemCMOS (ID=5) has no handler (20140424/exfldio-297) Mar 19 20:43:46 debian kernel: [ 0.237086] ACPI Error: Method parse/execution failed [\_SB_.PCI0._INI] (Node ffff88026e04e8d8), AE_NOT_EXIST (20140424/psparse-536) Mar 19 20:43:46 debian kernel: [ 11.975204] EXT4-fs (sda4): re-mounted. Opts: errors=remount-ro Mar 19 20:43:46 debian lightdm[854]: ** (lightdm:854): WARNING **: Error getting user list from org.freedesktop.Accounts: GDBus.Error:org.freedesktop.DBus.Error.ServiceUnknown: The name org.freedesktop.Accounts was not provided by any .service files Mar 19 20:43:50 debian lightdm[854]: ** (process:906): WARNING **: Error getting user list from org.freedesktop.Accounts: GDBus.Error:org.freedesktop.DBus.Error.ServiceUnknown: The name org.freedesktop.Accounts was not provided by any .service files Mar 19 20:44:24 debian lightdm[854]: ** (process:991): WARNING **: Error getting user list from org.freedesktop.Accounts: GDBus.Error:org.freedesktop.DBus.Error.ServiceUnknown: The name org.freedesktop.Accounts was not provided by any .service files Mar 19 20:48:27 debian kernel: [ 300.204379] mce: [Hardware Error]: Machine check events logged