Comment 8 for bug 54621

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Allison Karlitskaya (desrt) wrote :

From page 436 of the ICH7 spec (January 2006)

bit 3 of SMI_EN:

LEGACY_USB_EN — R/W.
0 = Disable.
1 = Enables legacy USB circuit to cause SMI#.

temporarily disabling this single bit allows the delay loop calibration to work.