USB stop working

My USB port stoped working, so when I cannoect an external hard or flash memory or anything else there is no response, the other one still working though!
I remember once I faced this problem and called Apple support and they asked me to restart and presseing Option and command key's while restating, and the problem was solved!
but now it is back again and I cannot solve it!
any one help please

You mentioned in your post that prior per the Apple support told you to press the Option and Command keys.  Did you try that again?
Please note:  4. Press and hold the Command-Option-P-R keys. You must press this key combination before the gray screen appears.  (from the PRAM instructions)
That may be a missing element.  Try it.  Will not do any harm.
Ciao.

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    [ 569.310960] xhci_hcd 0000:03:00.0: HC died; cleaning up
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    [ 569.324628] Extended CMOS year: 2000
    [ 569.331940] [drm] Enabling RC6 states: RC6 on, RC6p on, RC6pp off
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    [ 569.534701] usb 1-1.5: reset full-speed USB device number 3 using ehci_hcd
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    [ 569.674395] ata1: SATA link up 6.0 Gbps (SStatus 133 SControl 300)
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    [ 569.684439] usb 1-1.6: reset high-speed USB device number 4 using ehci_hcd
    [ 569.969276] iwlwifi 0000:01:00.0: L1 Enabled; Disabling L0S
    [ 569.976072] iwlwifi 0000:01:00.0: Radio type=0x2-0x1-0x0
    [ 570.377316] PM: resume of devices complete after 1116.468 msecs
    [ 570.378930] PM: Finishing wakeup.
    [ 570.378933] Restarting tasks ... done.
    [ 570.409428] video LNXVIDEO:00: Restoring backlight state
    [ 606.007121] usb 1-1.2: new high-speed USB device number 6 using ehci_hcd
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    [ 607.096239] sd 9:0:0:0: [sdb] 31266816 512-byte logical blocks: (16.0 GB/14.9 GiB)
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    Last edited by otto_simpson (2013-01-23 01:28:49)

    Oh crap! I am kid with his new toy...
    After a lot of google it I read something about firmware control the wake up of USB 3.0 and when I entered in this laptop BIOS what I found?! This option disabled:
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    So, just enable it and all my USB ports go back to work after suspend. I don't understand the purpose of it disabled by default.
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    Last edited by otto_simpson (2013-01-23 04:16:20)

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