Firefox uses 100% of CPU after hibernate

I recently upgraded to Firefox 2.0.3. Previously I had been using a 1.5.x version. After discovering Firefox frequently using 100% of the CPU after using it only for a short while, I investigated further. It apparently is makes tons of gettimeofday syscalls. I stumbled upon a known issue in bugzilla. Mozilla runs at ~100% cpu usage after connection is interrupted or wakeup from hibernate or standby. I thought it was some page I was visiting, but apparently not. Firefox 1.5 doesn’t have this issue on my hardware platform, a Dell Inspiron 1100 running Linux 2.6.20.6 with the latest release of suspend2. I have downgraded back to 1.5, which I was happy with anyway.

Update, May 14th. Apparently Firefox 1.5 suffers from the same issue on my laptop. I have switched to Opera. I am much happier for it.

This entry was written by jasonb, posted on 4/30/2007 at 12:52 am, filed under Rants. Bookmark the permalink. Follow any comments here with the RSS feed for this post. Post a comment or leave a trackback: Trackback URL.

3 Comments

  1. Mark
    Posted 5/13/2007 at 7:58 pm | Permalink

    Hi Jason,

    I have the same “Firefox hoggs CPU after hibernate” problem. Not all the time, but especially when it wakes up with lots of tabs open…..

    Did you ever find a definitive cause or surefire fix?

    Thanks

  2. Russ P
    Posted 7/12/2007 at 9:12 am | Permalink

    Appears to be a problem with the Flash plugin. See:
    http://kb.mozillazine.org/Flash#Delay_or_hang_waking_from_standby

  3. jasonb
    Posted 7/15/2007 at 10:36 pm | Permalink

    Meh. I don’t have Flash installed on that box. The advice to close Firefox before hibernating is worthless. If I wanted to close Firefox — and these days the browser is one of the more important applications that’s running — I’d just shut the system down.

    Fortunately Opera remembers all my tab preferences, tab histories, and actually survives a hibernate.

    I can’t imagine ever going back to Firefox again.

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