Dell Latitude E6500 freezes when in dockingstation

A quick one here, just to share an issue that was bothering me.
I have a Dell latitude E6500 laptop. When i ran Windows XP SP3 on it, i could work fine with it, whether on battery, on ac-power, or in a docking station.
Then i upgraded to Windows 7.
It still runs OK on battery and on ac-power, but when i would dock it in a dockingstation, the laptop would randomly freeze within 10 minutes of using.
Freeze as in: no more response to mouse / keyboard, screen still working, and the only way to resolve it is by pressing the power button for 5 seconds to turn it off.
Tried the following:
– newest BIOS (using A22 now)
– Re-install of Windows 7
– eliminate possible driver issues, tried latest version of all device drivers

Still no dice.
Then i started eliminating causes:
– It can’t be a hardware failure (for instance of the dockingport on the laptop), because then with XP it should also have crashed when on the docking station.
– It’s not a driver or software issue, because then it should also crash while on battery or on ac-power.

FInally, i thought about powersaving issues. Maybe the laptop wants to go on some sort of hibernation or S-state, and doesn’t correctly handle the “on-battery” vs. “on-AC power” change when putting it into the dockingstation.
After all, the freeze looked as if the CPU was just being halted.
So i disabled all power-saving features in Windows 7 (Energysavings->High Performance) and applied this profile to be used when on battery and when on ac-power.
Since then, no more problems when used in docking station!
I’ve worked for a few weeks now with the laptop occasionally docked, and still going strong.
I hope anyone can be helped with this.

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5 Responses to “Dell Latitude E6500 freezes when in dockingstation”

  1. Bob Says:

    The E6500 is a notoriously bad docker!!!! My prevous D810 was wonderful. You could hot dock, cold dock, etc. without problem. The E6500 on the other hand is very fragile. The things I have discovered that help are: 1)NEVER HOT DOCK!!! 2) Dock only when the laptop is in “sleep mode”, standby 3) Undock by putting the laptop in “Hibernate.”

  2. Grateful Says:

    Thank you, thank you! My E6400 was randomly freezing up after upgrading to Windows 7. It took me an embarrassingly long time to make the connection to the docking station. I was at a total loss until I came across this post. The disabling of all power-saving features has worked like a charm for me.

  3. Paul Says:

    Go to your control power power options and select “High Performance”.
    I went from locking daily, swapping out motherboard, swapping dock, and hours of pain, then a kind angel provided me this solution.
    That kind angel is Robert B Hall Jr of Pinnacle Technical Resources. Buy him a beer if this works for you!

  4. Paul Says:

    What about if I am using Windows Vista rather than Windows 7?

  5. paul Says:

    Worked a treat… Incidentally on the 6220 – the High Performance works, on the 6230 the “Dell” plan works – both had latest BIOS too.

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