Same issue here with an ASUS T100 tablet. With DisplayLink installed but no hub connected, Connected Standby drained 25% in 14.5 hours, with Intel HD Graphics showing 100% active time.
After installing R7.5M1 last night, battery drain was 4% in 8 hours. HD Graphics is the fifth offender, with 0% active time; top offender is Intel SD Host Controller with 1% active time.
Thanks everyone for reporting this and thanks DisplayLink for fixing it. I didn't even think of DisplayLink when I saw that Intel was the "offender," but a thread at another site pointed me here and now it seems it's already fixed!
Mark Berry
MCB Systems
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