Clock Running Fast on Guest Linux

Parallels Desktop is great, but I noticed a strange problem yesterday. The clock on my virtual Linux box was advancing a lot faster than realtime. This causes a host of weird problems like the compiler warning me that some of my source files were modified in the future. Another symptom was the wacky Idle Time shown in ‘top’.

After some googling, I found this page. Basically, the solution involves adding one line to the configuration of your boot loader (e.g. grub or lilo) - “clock=pit”. Visit the above page for detailed explanation or google “parallels clock=pit”.

One Response to “Clock Running Fast on Guest Linux”

  1. Yellow Mug Blog » Blog Archive » Virtual Machine Clock Issue Part II Says:

    […] A few days back, I blogged about the clock on my virtual Linux box running faster than normal. Even though the fix works, there is another problem. When I resume the virtual machine after letting Parallels Desktop suspend it, the clock continues from the time the virtual machine was suspended. […]

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