| # Copyright (c) 2013 The Chromium OS Authors. All rights reserved. |
| # Use of this source code is governed by a BSD-style license that can be |
| # found in the LICENSE file. |
| |
| from autotest_lib.client.bin import test |
| from autotest_lib.client.cros import power_utils, sys_power |
| |
| |
| class power_BacklightSuspend(test.test): |
| version = 1 |
| |
| def run_once(self, resume_percent=70): |
| results = {} |
| backlight = power_utils.Backlight() |
| |
| results['initial_brightness'] = backlight.get_level() |
| max_level = backlight.get_max_level() |
| resume_level = int(round(max_level * resume_percent / 100)) |
| |
| # If the current brightness is the same as the requested brightness, |
| # request 100 - |resume_brightness| instead. |
| if resume_level == results['initial_brightness']: |
| resume_level = max_level - resume_level |
| backlight.set_resume_level(resume_level) |
| |
| sys_power.kernel_suspend(seconds=5) |
| |
| final_level = backlight.get_level() |
| if final_level != resume_level: |
| raise error.TestFail( |
| ('Brightness level after resume did not match requested ' + \ |
| 'brightness: %d vs %d') % (final_level, resume_level)) |
| |
| results['resume_brightness'] = resume_level |
| self.write_perf_keyval(results) |
