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Why is there no wake from sleep using only on-board keyboard and touchpad with Dell eighth generation systems?

Summary: This article provides information about why only some Dell systems will wake if you are using the systems Power Button.

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Article Content


Symptoms


The following article provides information about why only some Dell systems will wake if you are using the systems Power Button.


 

Why does only the Power Button wake some Dell Systems from Sleep?

 

Why is it that certain generations of laptops or tablets can only be woken from sleep mode by using the power button?

Why is there no Deep Sleep Control feature in the BIOS of your system? (Even with no external connected devices (USB), the system onboard keyboard and touchpad can only be awoken from sleep with the power button.)

QNA44466_en_US__1icon Note: This feature is those systems working as they were designed.


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Resolution

 

USB Wake Support

 

This has everything to do with the USB Wake Support functionality of the following Dell systems:

(Table.1 USB Wake Support Functionality)

Systems with USB Wake Support Functionality
Inspiron Vostro XPS XPS
Desktop
Latitude OptiPlex Precision
Mobile
Precision
Workstation
14" 7472 13" 5370 15" 9560 27" 7760 AIO 12" 7285 5050 15" 5520 5720 AIO
15" 7572 14" 5471 13" 9370   12" 5280 3050 15" 7520 3620 Tower
15" 7577 15" 7570     12" 5288 5055
A-Series
17" 7720 3420 Tower
13" 7370 14" 3478     14" 5480 5055
Ryzen CPU
15" 5530 2-in-1 5820 Tower
13" 7373 2-in-1 15" 3578     14" 5488 5250 15" 7530 7820 Tower
15" 7570       15" 5580 7050 17" 7730 7920 Tower
15" 7573 2-in-1       11" 3180 3050 AIO   7920 Rack
13" 5370       11" 3189 7450 AIO    
15" 5570       13" 3380      
17" 5770       12" 5289      
14" 3476       13" 7389      
15" 3576       12" 7212      
        14" 3490      
        12" 5285      
        12" 7280      
        13" 7380      
        14" 7480      
        14" 3480      
        15" 3580      
 

What is USB Wake Support?

There is a BIOS setup setting on some systems called USB Wake Support, which can enable or disable the ability of a USB device to wake the system from the S3 state (Sleep).

When enabled, USB devices can wake the system from S3 (example: USB mouse, USB keyboard). Furthermore, on AIO (All in One) systems, the touch screen is a USB input device and also has the capability of waking the system.

When disabled, USB devices cannot wake the system form S3. Disabling this setting can help a user save power by turning off power to the USB ports in S3.

USB Wake Support does not function on battery power; that is, if a portable system on battery power enters S3, USB devices will not be able to wake it up. Whether the USB devices are externally powered or derive their power from the system’s USB port makes no difference. The determining factor is whether or not the system’s USB ports are powered and able to detect USB traffic. Upon entering S3, the system will turn off power to the USB ports in order to conserve power.

Some systems support a feature called Deep Sleep. For USB Wake to work, the USB ports must not be in Deep Sleep.

Deep Sleep Support:

  • When set to Disabled: All USB ports can wake up the system from S3, but only the system’s Smart Power On Connector port can wake up the system from S4 and S5.
  • When set to Enable S5 only: All ports can wake up the system from S3, but only the system’s Smart Power On Connector port can wake up the system form S4. No wake support for S5.
  • When set to Enable S4 and S5: All ports can wake up the system from S3. Wake from S4 and S5 is disabled in this case.


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Article Properties


Affected Product

Inspiron 5370, Inspiron 7370, Inspiron 7373 2-in-1, Inspiron 5575, Inspiron 5770, Inspiron 5775, Latitude 3180, Latitude 3189, Latitude 5280/5288, Latitude 7212 Rugged Extreme Tablet, Latitude 7214 Rugged Extreme, Latitude 7280, Latitude 13 3380Inspiron 5370, Inspiron 7370, Inspiron 7373 2-in-1, Inspiron 5575, Inspiron 5770, Inspiron 5775, Latitude 3180, Latitude 3189, Latitude 5280/5288, Latitude 7212 Rugged Extreme Tablet, Latitude 7214 Rugged Extreme, Latitude 7280, Latitude 13 3380, Latitude 5480/5488, Latitude 7414 Rugged, Latitude 7480, Latitude 5580, OptiPlex 3050 All-In-One, OptiPlex 3050, OptiPlex 5050, OptiPlex 5250 All-In-One, OptiPlex 7050, Precision 5820 Tower, Precision 7820 Tower, Precision 7920 Tower, Precision 7920 Rack, Precision Rack 7910, Precision Tower 7910, Vostro 5370, Vostro 5471, Vostro 15 7570, XPS 12 9250, XPS 13 9333, XPS 13 9343, XPS 13 9350, XPS 13 9360, XPS 13 9365 2-in-1, XPS 13 9370, XPS 15 9530, XPS 15 9550, XPS 15 9560, XPS 15 9570, XPS 15 9575 2-in-1See more

Last Published Date

21 Feb 2021

Version

4

Article Type

Solution