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Re:Do not leave XPS laptop in any sleep/hibernate/standby mo... by chippiewill on Friday September 24, 2021 @05:14PM (#28647918)
Yep, the XPS 9500 and 9700 series with a discrete GPU cannot to s3 sleep.

It's because Intel have been incrementally removing support for s3 sleep, it's completely gone in the latest Tigerlake chips.

Linux s2idle support for modern Intel low CPU package power states is still pretty rough which is why you'll get a good chunk of power drain still.

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