USB power issues with Citrix Receiver

usbpowerexceededr So we deployed the latest Citrix Receiver (4.0 at the time).  Then the issues rolled in.  “USB Hub Power Exceeded” was one of them.  The typical customer complaining was a user with a laptop in a docking station.

The cause of the error is that the Citrix Receiver client (file ctxusbm.sys) is restricting the USB power down to 100ma, from 500ma.  It’s a bug that’s been around since at least July 2013.  At the time of writing, it’s yet to be fixed.  I’m told that Citrix will bundle the fix into the Receiver v4.2 release.