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Lid switch BIOS option does not place the system in sleep

Summary: Workaround for the issue with the Switch Lid option not allowing the system to sleep.

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Symptoms

The Lid Switch BIOS option is newly added in BIOS 1.8.3 for Latitude 7390 2-in-1 and 1.7.4 for Latitude 5491 / 5591 / Precision 3530, and the default setting is set to disabled.  When this BIOS version has been updated by the executable file you may notice the setting is enabled after applied the BIOS, and experience the system being unable to enter into sleep mode when the lid is closed regardless of the setting in the power management.

Resolution

As a workaround, please change the setting in the BIOS to load default and this will change to disable.

A further BIOS update will be released to Dell Drivers and Downloads soon to resolve this permanently and we recommend checking back for this new version.

Affected Products

Latitude 7390 2-in-1, Latitude 5491, Latitude 5591, Precision 3530