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      1 import logging, time
      2 from autotest_lib.client.common_lib import error
      3 
      4 
      5 def run_linux_s3(test, params, env):
      6     """
      7     Suspend a guest Linux OS to memory.
      8 
      9     @param test: kvm test object.
     10     @param params: Dictionary with test parameters.
     11     @param env: Dictionary with the test environment.
     12     """
     13     vm = env.get_vm(params["main_vm"])
     14     vm.verify_alive()
     15     timeout = int(params.get("login_timeout", 360))
     16     session = vm.wait_for_login(timeout=timeout)
     17 
     18     logging.info("Checking that VM supports S3")
     19     session.cmd("grep -q mem /sys/power/state")
     20 
     21     logging.info("Waiting for a while for X to start")
     22     time.sleep(10)
     23 
     24     src_tty = session.cmd_output("fgconsole").strip()
     25     logging.info("Current virtual terminal is %s", src_tty)
     26     if src_tty not in map(str, range(1, 10)):
     27         raise error.TestFail("Got a strange current vt (%s)" % src_tty)
     28 
     29     dst_tty = "1"
     30     if src_tty == "1":
     31         dst_tty = "2"
     32 
     33     logging.info("Putting VM into S3")
     34     command = "chvt %s && echo mem > /sys/power/state && chvt %s" % (dst_tty,
     35                                                                      src_tty)
     36     suspend_timeout = 120 + int(params.get("smp")) * 60
     37     session.cmd(command, timeout=suspend_timeout)
     38 
     39     logging.info("VM resumed after S3")
     40 
     41     session.close()
     42