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Can we detect USB selective suspend ?
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Kid
Oct 25, 2009, 5:53:01 AM10/25/09
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Hi
Is there any good tool or api to detect if installed USB devices support
selective
suspend or not .
If device supports USB suspend , can we detect if it fully or partially
supports ?
Thank for your teaching .
Philip Ries [MSFT]
Oct 26, 2009, 4:09:09 PM10/26/09
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In Win7 there is "powercfg.exe -energy" which tells you what devices
didn't selective suspend during the 60 seconds it runs. But a device
might support selective suspend and not perform selective suspend during
this period (or any specific time period).
didn't selective suspend during the 60 seconds it runs. But a device
might support selective suspend and not perform selective suspend during
this period (or any specific time period).
There's not much you can do to query for selective suspend support. USB
device descriptors don't indicate support for selective suspend or lack
thereof. Similarly USB device drivers don't have to indicate to the OS
whether their device supports selective suspend. Some of the drivers
that support selective suspend will allow you to disable selective
suspend via Device Manager property page (WMI).
What do you mean by partial support for selective suspend, vs. full support?
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