https://cros-goldeneye.corp.google.com/chromeos/healthmonitoring/testDetails?testName=audio_AudioBasicUSB*&suite=&daysBack=30&board=veyron_jerry&architecture=&boardFamily=&buildConfig=&reason=&version=&milestone=68&dut=&token=ALeBcqEzsq-mE7GmVLOQm8sR8n7f%3A1525688770612

Need check USB cable and chameleon on host chromeos15-audiobox2-host1 for veyron_jerry, too.
Thanks!

If both host don't have USB cable,
the label "test_usbaudio" should be removed.
Thanks!

Thanks paul, we'll check on 
- auron_paine at chromeos15-audiobox4-host1
- veyron_jerry at chromeos15-audiobox2-host1
and update the status here.

... my expectations are to have the cables in place, but chameleon power-cycle to resolve this. If this is the case, we'll file a bug under Test>Chameleon so USB connection state be clean at each test start and end.
... we'll check USB cables too.

1) chromeos15-audiobox4-host1 - USB cable from chameleon to USB HUB was unplugged from both chameleon and USB Hub.  I have reconnected the USB cable and the test is passing:
-----------------------------------------------------------------------------------------------------------
/tmp/test_that_results_YIJ_JS/results-1-audio_AudioBasicUSBPlayback                             [  PASSED  ]
/tmp/test_that_results_YIJ_JS/results-1-audio_AudioBasicUSBPlayback/audio_AudioBasicUSBPlayback [  PASSED  ]
-----------------------------------------------------------------------------------------------------------

2) chromeos15-audiobox2-host1 has the older chameleon board deployed (micro usb connector).  I reseated the USB cable on both ends and the test is now passing
-----------------------------------------------------------------------------------------------------------
/tmp/test_that_results_tEVu96/results-1-audio_AudioBasicUSBPlayback                             [  PASSED  ]
/tmp/test_that_results_tEVu96/results-1-audio_AudioBasicUSBPlayback/audio_AudioBasicUSBPlayback [  PASSED  ]
-----------------------------------------------------------------------------------------------------------
Total PASS: 2/2 (100%)

Hi Kalin,

The USB link between chameleon and the DUT is not work again on host
chromeos15-audiobox4-host1

Need someone to check the USB cable on host chromeos15-audiobox4-host1

Thanks!

After we changed the USB cable between DUT and chameleon, the tests on chromeos15-audio-host1 is stable now.

Please check
https://stainless.corp.google.com/search?view=matrix&row=board_model&col=build&first_date=2018-06-13&last_date=2018-06-26&test=%5Eaudio%5C_AudioBasicUSB.*%24&build=%5ER68.*%24&board=%5Eauron%5C_paine%24&exclude_cts=true&exclude_not_run=false&exclude_non_release=true&exclude_au=true&exclude_acts=true&exclude_retried=true&exclude_non_production=false
and
https://stainless.corp.google.com/search?view=matrix&row=board_model&col=build&first_date=2018-06-13&last_date=2018-06-26&test=%5Eaudio%5C_AudioBasicUSB.*%24&build=%5ER69.*%24&board=%5Eauron%5C_paine%24&exclude_cts=true&exclude_not_run=false&exclude_non_release=true&exclude_au=true&exclude_acts=true&exclude_retried=true&exclude_non_production=false
for audio_AudioBasicUSB tests on m68 and m69.

Let's close this issue.