I'm experiencing the same problem. The event log gives me this message: This driver responded slower than expected to the resume request while servicing this device:
Driver File Name : \Driver\WUDFRd
Driver Friendly Name : Windows Driver Foundation - User-mode Driver Framework Reflector
Driver Version : 6.1.7601.17514 (win7sp1_rtm.101119-1850)
Driver Total Time : 2342ms
Driver Degradation Time : 2277ms
Incident Time (UTC) : 2011-07-30T07:45:05.961032900Z
Device Name : WpdBusEnumRoot\UMB\2&37c186b&0&STORAGE#VOLUME#_??_USBSTOR#DISK&VEN_GENERIC-&PROD_MULTI-CARD&REV_1.00#00000#
Device Friendly Name : RTS5121LUN0
Device Total Time : 2342ms
Device Degradation Time : 2277ms
I can't find a solution for the problem. Suggestions?