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The chipmaker says a USB bug in the chipset that accompanies the "Haswell" processor exists and will be fixed.
The bug can cause USB (Universal Serial Bus) 3.0 devices, like thumb drives, to disappear after entering standby. In some cases, removable devices have to be reconnected again, according to a report at BSN.

According to the Product Change Notification, a new "stepping" -- a version of the chipset with the fix -- will be sent as samples to customers starting April 19. The final version of the fixed chipset will be available starting July 15.

Haswell, which is shipping to PC makers now, is the next-generation mainstream Intel processor that will power ultrabooks and a variety of hybrids that straddle tablet and laptop designs.

Haswell's new microarchitecture will deliver "the single largest generation-to-generation battery life improvement in Intel history," according to a recent statement from Intel CEO Paul Otellini.