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i.MX28 usb_wakeup Blocking on Resume

Question asked by SteveO1z on Sep 14, 2012
Latest reply on May 23, 2013 by Binoy Jayan
Branched to a new discussion

Hi, all:


I'm currently experiencing an issue on a board very similar to the i.MX28 dev board, running the 2.6.35_10.12.01 Linux kernel. What is happening is that after an extended period of standby sleep (so far longer than a half-hour), on occasion the system will resume running extremely slowly and unresponsively. This continues until the system is put back into standby and re-awakened. I was able to determine that the process listed as "[usb_wakeup thre]" was consuming 93% - 98% of CPU cycles and never stops this level of CPU usage. Nothing is plugged into either of the USB ports. The USB's are not set as wake-up sources and in fact the system does not wake up on insertion of flash drives or a host.


Has anyone experienced this issue on the i.MX28? Thanks in advance for any help or advice.