The usual way of waking the computer from sleep mode is to press the mouse button or press a key on the keyboard.  I don't recommend waking it by pressing the power button.  Are you pressing the power button because pressing the mouse button doesn't do anything?  If so , then you will go to Control Panel, Hardware, Device Manager.  Under Mice, open the settings for your mouse and under the power management tab, "Allow the computer to turn off this device to save power" should not be checked, and "Allow this device to wake the computer" should be checked.

Hi Tony

This started on mine very recently. I could not find a proper answer to stop from this happening. So I went into power options, on the left pane choose "change when computer sleeps" here on put the computer to sleep-I have chosen "never".

Now I know I am not saving power but I do not need to stop and restart the computer as you have mentioned.

njs1, I tried to go to Mouse the way you described but when come to the Device Manager, I am stuck. Perhaps one has to be loged on as administrator to access as what you have described. The way you described and I reach the mouse and I cannot see "power management" under mouse!!

Would you mind elaberating If I had missed something? Thanking you

snow

Dimension 9200
Intel ViiV Core 2Duo E6400 Processor 2.13GHz 1066 MHz 2MB
Windows XP media Centre Edition 2005 now VISTA OS 32bit
Memory:2048 MB Dual DDR2 533 MHz [2x1024]
Dell Wireless Bluetooth Keyboard & Mouse Dell Wireless Bluetooth
Video Card: 1GB nVidia GeForce 7950 GX2 Dual graphics card
Sound Card Sound Blaster X-Fi Xtreme music
BIOS 2.5.3
Intel 82801 HR/HH/HO SATA RAID controller
Intel Matrix Storage Manager v7.6.0.1011
Chipset v.8.1.1.1013
HL-DT-ST DVD +/- RW GSA-H31N
HL-DT-ST DVD-ROM GDRH10N
Hard Drive: 640 GB [2*320GB]SATA stripe RAID 0
Media Card Reader 13-in- 1 internal

Thank you njs1.

Yes, you are correct.

My computer is used by other family members who do not have the Administrator rights and hence earlier on I could not reach that point.

Now I went in with my account and see what you say.

Thanks

snow

snow,

On my computer (I am the only user, the administrator), I click on Device Manager and the box pops up that Windows needs my permission to continue, and I click continue.  Device Manager appears.  Then I have "Mice and other pointing devices" on the list, I click the plus sign next to that, then see "HID compliant mouse" and double click it, then I see the "Power Management" tab.

>>>>"USB Device not recognized. One of the USB devices attached to this

computer has malfunctioned, and windows does not recognize it. For further

assistance in solving this problem, click this message" 

Tony614, I too have an XPS 420 that does not respond well upon waking up

from sleep. your error messages are fairly close to what I have experienced

with mine.  sometimes mouse would not respond, sometimes the keyboard

would not respond, and sometimes neither device would respond.  sometimes

an unplug-then-replug the USB device solves it. but most times, a clean reboot

resolves all. 

i tried reloading drivers for USB devices and tried using "Problem Reports and Solutions"

program. nothing positive.

i just learn to live that the sleep doesn't work well with my computer. 

I have read, don't remember where, that Vista SP1 may address some of the sleep problems.

when I load SP1, I will try it again.

but actually I have changed my computing habits because of this sleep problem.

I think in the long run it saves more power.

during the week when I'm at work the computer is OFF.

it's ON only when I use it in the evenings.

during the weekend when I'm at home, I leave the computer ON all the time.

even when I had XP on another machine, this was the way I computed.

I never used sleep.

Vista boots up fast for me - just as fast as XP.  only about 30-45sec

so sleep is really a non-issue for me.

joe