[Bug 530487] Re: BUG: soft lockup - CPU#2 stuck for 0s! [firefox-bin:1751] (during suspend/resume)

[Colin King]

Looking at the kernel log time stamp, it's incredibly large:
1266874884.727449, which suggests that you are suffering from a bug in
the Time Stamp Counter (TSC) (see
http://en.wikipedia.org/wiki/Time_Stamp_Counter).

This is very similar to a known issue with other Intel processors, where
the top 32 bits of the 64 bit TSC gets set to 0xffffffff after coming
out of resume. This causes the soft lockup code to get confused because
of an overflow error and this it then it erroneously reports softlockups
on various CPUs.

This error message is essentially a false positive. A workaround to stop
the kernel getting confused when the TSC warps so badly when coming out
of resume is to use the following kernel boot parameter:  notsc

This will disable the use of the TSC.  Please try this and let me know
if it resolves the issue. Thanks!


** Changed in: linux (Ubuntu)
       Status: In Progress => Incomplete

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BUG: soft lockup - CPU#2 stuck for 0s! [firefox-bin:1751] (during suspend/resume)
https://bugs.launchpad.net/bugs/530487
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