Getting Black screen while capturing screen shot in IE 8

[rajesh singh]

Hi all,

 I am using Python script with Webdriver to automate testcase. In my test script i have used driver.get_screenshot_as_file("path") to capture screenshot. The test runs for 8 hrs on windows 7 machine on IE 8 browser and captures screen shot in every one hour. It successfully captured screenshot up to 6th hour, but after that it captured screenshot with only  BLACK screen. I executed the same script in Firefox 10, i didn't get any BLACK screen as screenshot.

 If anybody has any idea on this(capturing Black Screen on IE8), please feel free to suggest.

Thanks,

Rajesh

[Gustavo Godoy]

Hi,

When you run in FF, the time elapsed is the same, on IE? Did you check if our windows go to hibernation after this 6hr? I asked about FF because the tests run more faster on it, so I think you can´t get blank screen...

I have this issue when my win machine goes sleep or when automatically locked, asking for password.

gustavo

[David Lai]

Are you trying to save it from a RemoteWebdriver?  for some reason I remember it being more reliable to pipe it as a base 64 encoded stream and decoded locally before saving it when dealing with Remote webdriver instances.

Here's my code for saving screenshots in Python.

https://github.com/wiredrive/wtframework/blob/master/wtframework/wtf/web/capture.py

[rajesh singh]

hi gustavo,

 In both case(FF and IE 8), the same test is made to run for 8 hrs and captures screen shot in every one hour intervals ,then test terminates. In FF 10, it successfully captured screenshot for 8 hrs, but in IE 8 in last two hrs i.e 7th and 8th hr it took BLACK screen as screenshot. I executed multiple time in IE 8 and got the same results.

regards,
Rajesh

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