W520 entering sleep mode but sleep disabled in power mgmt?

Question

I have a W520 running Windows 7 Professional. Just recently, my laptop has been going into sleep mode after being idle for about 2-4 minutes (the time is not consistent). My power management is set to "high performance". Put the computer to sleep is set to "Never". The advanced power settings are:
Sleep after
On battery: Never
Plugged in: Never
Allow hybrid sleep
On battery: Off
Plugged in: Off
Hibernate after
On battery: Never
Plugged in: Never
Allow wake timers
On battery: Disable
Plugged in: Disable
Does anybody have an idea of why my laptop goes into sleep mode after 2-4 minutes? Is this a software or hardware problem?

Answer 1

Hi KnightCa,
Welcome to Lenovo Community Forums!
I'm really sorry to hear that your Lenovo W520 goes into sleep mode even after it has been disabled in Power management.
Go to Control panel - - >Power Options - - >Change plan settings (Choose the Power plan that you have selected) - - >Change advanced power settings - - >Adjust the settings under sleep and display as shown below.
Also, try doing a windows update and reinstallation of Power manager in your system.
If the above said didn’t help, try doing a registry editing.
1. Open the Start Menu.
2. In the white line (Start Search) area, type regedit and press Enter.
3. If prompted, click on Continue in the prompt.
4. In regedit, go to: HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\Power\PowerSettings\238C9FA8-0AAD-41ED-83F4-97BE242C8F20\7bc4a2f9-d8fc-4469-b07b-33eb785aaca0\DefaultPowerSchemeValues.
5. Expand DefaultPowerSchemeValues and Click on the key that is for the Power Plan that you want to change the wait time (Refer the table below)
Spoiler (Highlight to read)
6. In the right pane, right click on ACSettingIndex (while on AC power) or DCSettingIndex (while on battery power) and click on Modify.
7. Choose Decimal, and type in how many seconds you want Windows to wait to go back to sleep automatically after an unattended wakeup.
Spoiler (Highlight to read)
8. Close regedit.
9. Restart the computer to apply.
Hope this helps and do post back with the results. Expecting to hear from you soon.
Best Regards,
Mithun.
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