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Problem: Gmail (and only Gmail) quits working for a period of 5-10 mins only on one computer.

  • Problem occurs several times daily
  • Does not appear to be any "triggering event" - user is simply using Gmail normally when the problem arises
  • User can access their Gmail from other computers on same LAN
  • User can access all other sites, including other Google sites, from affected computer
  • After several mins of outage, Gmail will spontaneously resume normal operation on affected computer
  • The problem occurs in all browsers (Chrome, FF, Safari)
  • Computer: MacBook Pro, OSX 10.7.3, latest browsers

I find this very baffling. Any advice welcome.

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Wireless, wired? If first, test if it happens with wired connection as well. Not very likely but best to rule it out immediately. –  Sašo May 31 '12 at 18:23
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A problem description of "quits working" is not very detailed. What happens when you try to access Gmail? –  David Schwartz May 31 '12 at 18:30
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A tcpdump on the affected host at the time might help diagnose the problem. –  Ladadadada May 31 '12 at 18:37
    
Have you cleared the cache on the affected browser? –  Mike Pennington Jul 7 '12 at 8:18
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2 Answers

Have you checked for DNS problems?

I have seen quite a few Macs with DNS Changer malware on them, and they often exhibit strange behaviour not unlike this.

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Sounds like a network card issue, NIC could be a little messed up which confuses GMAIL. Is DHCP being used here? If so try using a static IP for this laptop.- If this works then change your network card.

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