penalvch,I managed to post report of this issue to linux-acpi mailing list.
thanks you and your instruction documents.
by the way,kernel 3.19.rc4 still has this problem.
and I noticed that I forget to write about USB cable.
to cause this issue at my computer,USB 3.0 HDD must be connected to USB 3.0 port with USB 3.0 (5Gbps superspeed) cable.
when USB 3.0 HDD is connected to USB 3.0 port with USB 2.0 480Mbps Highspeed cable, this problem does not happen.
penalvch,I managed to post report of this issue to linux-acpi mailing list.
thanks you and your instruction documents.
by the way,kernel 3.19.rc4 still has this problem.
and I noticed that I forget to write about USB cable.
to cause this issue at my computer,USB 3.0 HDD must be connected to USB 3.0 port with USB 3.0 (5Gbps superspeed) cable.
when USB 3.0 HDD is connected to USB 3.0 port with USB 2.0 480Mbps Highspeed cable, this problem does not happen.