Full USB hub devnode dissapears
in [Device Drivers]
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From: Pepe on 12 Nov 2007 10:08 Hi, I already posted a question about this problem (http:// groups.google.es/group/microsoft.public.development.device.drivers/ browse_thread/thread/01990e3585a93c83?hl=es). Now, I have reproduced the situation and I have the following traces from Windbg: USBHUB: Warning ************************************************************** ESD or hub failure occurred, attempting recovery. ****************************************************************************** >From this point on, the devices that are attached to that hub disappear and I have to manually disable and re-enable **any** HCI to get the devices up and working again. The involved hub is from Cypress (PID 6812) in case this information helps. My question is, where can I get detailed information about all the events that can cause the trace "ESD or hub failure occurred, attempting recovery" in usbhub.sys appear? Thank you very much
From: Doron Holan [MSFT] on 12 Nov 2007 12:55
ESD is "electric static discharge". this means that something went crazy on the wire and the hub driver tried to recover d -- Please do not send e-mail directly to this alias. this alias is for newsgroup purposes only. This posting is provided "AS IS" with no warranties, and confers no rights. "Pepe" <PepeRodriguezArgente(a)gmail.com> wrote in message news:1194880111.647890.9920(a)57g2000hsv.googlegroups.com... > Hi, > > I already posted a question about this problem (http:// > groups.google.es/group/microsoft.public.development.device.drivers/ > browse_thread/thread/01990e3585a93c83?hl=es). Now, I have reproduced > the situation and I have the following traces from Windbg: > > USBHUB: Warning > ************************************************************** > ESD or hub failure occurred, attempting recovery. > ****************************************************************************** > >>From this point on, the devices that are attached to that hub > disappear and I have to manually disable and re-enable **any** HCI to > get the devices up and working again. > > The involved hub is from Cypress (PID 6812) in case this information > helps. > > My question is, where can I get detailed information about all the > events that can cause the trace "ESD or hub failure occurred, > attempting recovery" in usbhub.sys appear? > > Thank you very much > |