A timeout occurred while waiting for the EHCI host controller Asynchronous Schedule to transition to the enabled state.

Anonymous
2012-10-29T18:24:53+00:00

When I'm using my computer running Windows 8 Pro x64 randomly all of the USB's will freeze up, yet the PC will still run fine. Then they will all come back online a little while later. 

By online my WiFi adapter doesn't seem to re-initiate.

Checking the events log I see a flurry of the following error.

"A timeout occurred while waiting for the EHCI host controller Asynchronous Schedule to transition to the enabled state."

Thanks,

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Windows for home | Previous Windows versions | Devices and drivers

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Anonymous
2014-11-12T17:34:51+00:00

Those of you with USB WiFi adapters based on Atheros AR9271 chips (TP-Link WN722N, Netgear WNA1100 etc.) might want to try this.

I found a driver in the windows update catalog that is newer (version 2.0.0.49) than the one offered by windows update (2.0.0.32) that seems to have cured all the WiFi drops I was getting under heavy network load.

Atheros AR9271 Driver x64

You'll have to extract the .cab(inet) archive and then do a manual driver install (right click the adapter in device manager, update drivers and then pick the location manually, point it to where you unpacked the driver, from the 'have disk' dialog)

I have been running this for over a month and have not had any network specific drops since. Now, if I could only find a fix for the joystick drops in FSX...sigh

Notice, this is the 64bit driver, I cannot comment on the x86 driver one way or the other.

Also, if you are already running version 2.0.0.49 of the driver and still have problems, obviously this won't help you.

Hope this helps someone, best of luck.

Much thanks，this REALLY helps on tplink W822N

Problem solved~~~

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  1. Anonymous
    2014-11-12T16:57:19+00:00

    Windows Technical Preview Build 9860

    tp link W822N

    still have this problem..

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  2. Anonymous
    2014-07-29T22:34:35+00:00

    First, sorry for my English, but I'm Spanish :)

    I had the same problem, and luckily my mobo have an Etron EJ168 USB3.0 chip integrated. So I thought about connecting the Wi-Fi dongle in one of those Etron USB ports. But it didn't worked. After thinking about it, I remembered that I hadn't installed the drivers. So I installed it and it worked!

    So if you have another USB chip like me, try to put the Wi-Fi dongle on those ports. I know, it isn't the best fix, but if you're lucky enough to have another USB chip, this will work. Good luck to you!

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  3. Anonymous
    2014-07-22T08:37:30+00:00

    I did have an older AMD mobo but have upgraded since reporting the issue am running Win 7 pro and no longer any issues.  Am sure it will be useful to othets do thanks for the input!  Cheers

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  4. Anonymous
    2014-07-08T06:46:50+00:00

    You should check whether you have a motherboard with an older AMD southbridge chipset.  There is a known problem with some of the AMD USB EHCI controllers on Windows Vista+.  Here is a Microsoft KB article that explains how to work around the problem.  It doesn't mention Windows 8, but the solution may work in Windows 8 anyway.  I haven't tried it so proceed at your own risk.

    http://support.microsoft.com/kb/982091/en-us

    If you have a motherboard with one of the affected southbridges then read that article and make the registry changes.  Reboot and see if the problem still happens.  I have no idea whether it will work or not since I neither use Windows 8 nor use a USB wireless network adapter.  However, I do have a motherboard with the AMD SB850 southbridge.

    Microsoft's advice applies to the following AMD southbridges: SB600, SB700, SB710, SB750, SB810, SB820M, SB850.

    You'll know whether you have an affected motherboard if your USB EHCI controller has one of the Vendor and Device IDs mentioned in the KB article.  If it doesn't then this advice is not relevant to you.  Carry on with troubleshooting.  :-)

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