MSI G52-S9617X1 - Manual (Page 61)

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BIOS Setup
MSI Reminds You...
IRQ (Interrupt Request) lines are system resources allocated to I/O
devices. When an I/O device needs to gain attention of the operating
system, it signals this by causing an IRQ to occur. After receiving the
signal, when the operating system is ready, the system will interrupt
itself and perform the service required by the I/O device.
IRQs Activity Monitoring
Press <Enter> and the following sub-menu appears.
Primary INTR
Setting [ON] will cause the system to wake up from power saving modes if
activity is detected from any enabled IRQ channels. Setting options: [ON],
[OFF].
IRQ3~IRQ15
IRQ3~IRQ15 enable or disable the monitoring of the specified IRQ lines. If set
to [Enabled], the activity of the specified IRQ line will prevent the system
from entering power saving modes or awaken it from power saving modes.