Virtual AC cycling within an information handling system

In an information handling system (IHS), a processor-implemented method comprising:

• receiving, at a host/OS interface via an in-band management tool, a request for a virtual alternating current (AC) reset of the IHS;
• and
• in response to receiving the request:
• setting, via an application, a bit within an AUX register of an AUX based device to invoke the vAC reset if a system restart command is issued and changing a vAC recovery policy setting;
• and
• performing the virtual AC reset of the system by using an auxiliary (AUX) power control switch to control a switching of an AUX power to an AUX power rail which is coupled to an output of the AUX power control switch, wherein the AUX power control switch is coupled between an AUX power output of a chassis power supply and the AUX power rail, wherein the performing includes:
• configuring the vAC recovery policy to enable main rail power to be turned on and a system start-up procedure to be initiated when a restored vAC is detected;
• executing at least one of (i) a write to the AUX based register to set said bit and (ii) a change of the vAC recovery policy setting to trigger a system restart whenever vAC power is re-applied to said output, wherein said vAC recovery policy setting is maintained within a controller circuitry of a core logic chipset and is preserved across vAC reset operations;
• initiating said main rail power shut-down using a system restart command;
• and
• in response to detecting said main rail power shut-down while said bit is set, toggling the chassis AUX power to remove said power from the output of the AUX power control switch.

In an information handling system (IHS), a processor-implemented method comprising:

• receiving a request to trigger a virtual alternating current (AC) reset of the IHS at a server controller via an out-of-band management tool;
• in response to receiving the request:
• setting, via the server controller a bit within an AUX register of an AUX based device to invoke the vAC reset if a system restart command is issued;
• and
• changing a vAC recovery policy setting by performing one of (a) invoking a BIOS and (b) directly changing the vAC recovery policy setting;
• and
• performing the virtual AC reset of the system by using an auxiliary (AUX) power control switch to control a switching of AUX power to an AUX power rail which is coupled to an output of the AUX power control switch, wherein the AUX power control switch is coupled between an AUX power output of a chassis power supply and an AUX power rail, wherein the performing includes:
• configuring a vAC recovery policy to enable main rail power to be turned on and a system start-up procedure to be initiated when a restored vAC is detected;
• executing at least one of (i) a write to the AUX based register to set said bit and (ii) a change of the vAC recovery policy setting to trigger a system re-start whenever vAC power is re-applied to said output, wherein said vAC recovery policy setting is maintained within a controller circuitry of a core logic chipset and is preserved across vAC reset operations;
• initiating said main rail power shut-down using a system restart command;
• and in response to detecting said main rail power shut-down while said bit is set, toggling the chassis AUX power to remove said power from the output of the AUX power control switch.