#Windows wol wake support drivers
To ensure that the correct set of WOL patterns is set when the number of requested WOL patterns is higher than the number that the network adapter can support, protocol drivers assign a priority to each WOL pattern. Starting with NDIS 6.20, multiple protocol drivers can set WOL patterns on a network adapter. This method is separate from the wake on pattern match method. Note NDIS 6.20 and later versions of NDIS also support the wake on magic packet method. Specific patterns provide reliable pattern matches.Ī packet in which the wake-up pattern defines a specific packet type (such as TCP SYN on IPv4).Ī WOL pattern that is specified with an offset and bitmap. The interface for WOL patterns identifies specific patterns that are based on the packet type (for example, TCP SYN packets on IPv4). Note To support WOL, Surface devices must be plugged into AC power and use a Surface Ethernet adapter that is connected to a wired network. This WOL method minimizes spurious wake-up events and ensures that the computer is brought back to running state when expected. With WOL, IT admins can remotely wake up devices and automatically perform management tasks with Microsoft Endpoint Manager or third party solutions. It is not supported from fast startup or soft off (S5) shutdown states. WOL is supported from sleep (S3) or hibernate (S4).
#Windows wol wake support driver
The driver issues this status notification while it is handling the OID set request of OID_PNP_SET_POWER for the transition to a full-power (D0) state.įor more information, see NDIS Wake Reason Status Indications.Starting with NDIS 6.20, Wake-on-LAN (WOL) patterns are supported for the wake on pattern match method. The wake-on-LAN (WOL) feature wakes the computer from a low power state when a network adapter detects a WOL event (typically, a specially constructed Ethernet packet). Starting with NDIS 6.30, if the miniport driver supports NDIS_STATUS_PM_WAKE_REASON status indications, it must issue this status notification if the network adapter wakes the system. The MediaConnectStateConnected value is set in the MediaConnectState member of the NDIS_LINK_STATE structure. The network adapter notifies NDIS of a media connect event with the NDIS_STATUS_LINK_STATE status indication.
#Windows wol wake support full
NDIS notifies the miniport driver that the network adapter is at full power (D0) with the OID set request of OID_PNP_SET_POWER. NDIS sets the bus to full power (D0) with the IRP_MN_SET_POWER IRP. The IRP is pending completion from the last step in the power down sequence. The bus completes the pending IRP_MN_WAIT_WAKE IRP. The network adapter wakes the system by asserting WAKE# on the PCIe bus or PME# on the PCI bus. When the network adapter is waking the computer the following sequence occurs: The following figure illustrates the sequence of events that occurs to restore full power to a network adapter after a WOL event. NDIS sends the PCIe bus an IRP_MN_SET_POWER IRP to set the bus to the D3 state. NDIS sends the PCI Express (PCIe) bus an IRP_MN_WAIT_WAKE IRP to wait for a WOL event. For more information, see the NDIS_STATUS_LINK_STATE documentation. The MediaConnectStateUnknown value is set in the MediaConnectState member of the NDIS_LINK_STATE structure. The miniport driver may indicate an unknown media connect state using the NDIS_STATUS_LINK_STATE status indication. NDIS uses OID_PNP_SET_POWER to notify the miniport driver of the new power state (D3). NDIS_PM_WAKE_ON_LINK_CHANGE_ENABLED is cleared in the WakeUpFlags member. NDIS uses OID_PM_PARAMETERS to enable wake on LAN and to disable wake on media connect. When NDIS puts a network adapter in a low power state, the following sequence occurs: The following figure illustrates the sequence of events that occurs to set a network adapter to a low power state. For more information about D3 on disconnect, see Low Power on Media Disconnect. Note that the lower power on the media disconnect (D3 on disconnect) feature is canceled when the computer enters a sleep state in order to prevent waking the computer when the link state is externally cycled that is, when a switch is turned off and on. For more information about reporting WOL capabilities, see Reporting Power Management Capabilities. The wake on LAN (WOL) feature wakes the computer from a low power state when a network adapter detects a WOL event.Ī miniport driver reports network adapter WOL capabilities during initialization.
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