First, let us try to understand what is Selective Suspend Feature in USBs. We all know that , when a system is inactive or idle for some time, it automatically goes on a low-power state(Sleep , Hibernation, etc.) to conserve the power. Interestingly, it has this feature, where it ca...
Users don’t really need this on a system that is already charging and can use the plug-in power whenever needed. This is why Windows lets users enable the USB Selective Suspend based on the computer’s plug-in or battery. But the Selective Suspend feature isn’t a requirement on a desk...
selective suspend allows the operating system to place a single USB port into low-power mode. However unlike with devices, for USB ports this is known as the suspended state and not sleep. The goal of this setting is to
The USB selective suspend is an excellent feature for saving power. However, sometimes using this feature means facing problems with the USB connection. Therefore, when you face issues with a USB connection, try disabling the feature to see if it helps fix the problem. You can use any of th...
Look forUSB settings and expand it, expand USB selective suspend setting and set it toDisabled. ClickApplyandOKto let the change take effect. Solution 3: Change USB Power Management Settings There is a useful feature that Windows can turn off devices that are not in use so as to save powe...
Better power management when no driver is installed. The USB driver stack now suspends a USB port that causes the hub to suspend if it's the only device connected to the controller. DPC performance has been improved to avoid watchdog timeout crashes. Devices can now recover faster than the...
ExpandUSB settingsand EnableUSB selective suspend setting. ClickApplyandOK. Turn Off Fast Startup PressWindows + S. TypeControl Paneland pressEnter. Go toSystem and Security->Power Options. SelectChoose what the power buttons doin the left pane. ...
Click on the “USB settings” option and then tap on the “USB selective suspend setting.” Check if it is enabled, then click on the “Disabled” option. Tap on the “Apply” option and then click on the “OK” option. If the device is still not recognized, open the Device Manager...
In DevMan you can see which driver is used. Usbser.sys uses names like "Usb Serial Device (COM3)", while the Honeywell driver uses names like "Xenon 1900 (COM3)". I also search for other devices fro cross testing. Found that the selective suspend does not work as described ...
First published on MSDN on Oct 11, 2009 Hi, this is Qiang Qiu again from USB core test team.