Perception while Sleeping
I had some house rules to cover this issue, but Xanathar's came out with some applicable RAW (page 77).
Xanathar's covers sound/hearing. Sight and taste aren't likely to matter if you're asleep.
Using the Target numbers given for hearing checks while sleeping I will extrapolate Smell and Touch numbers for Passive Perception checks.
However, regarding Touch, there are some things to keep in mind: It doesn't take much shaking to wake someone up. It's automatic when that is the goal in fact. Lighter touches are what matters.
Much as Stealth would affect Hearing checks, Sleight will affect Touch checks. The examples given in Xanathar's seem to take into account the Disadvantage from sleeping. So, assuming a target number of the success roll for Stealth/Sleight under normal circumstances, while asleep the passive perception roll would be a target number 5 higher than the success roll was to reflect Disadvantage.
A Disadvantage penalty also applies to walls and doors. They are, after all, meant to block out noise. Pounding on your cabin door will wake you, per normal rules regarding sunned loud noises. Pounding on the door of the cabin next to (or directly across from) yours, however only wakens you if your passive perception is 15 or higher. Pounding farther away requires a Passive perception of 20. This is extrapolated from Xanathar's. An alarm bell from the Bridge will alert the on duty crew and anyone sleeping in the cabin below the bridge, but that's really about it.
Actual unconsciousness due to spell, injury, or ingested chemicals would make you entirely unaware, as per the Conditions section of the PHB. The above rules are for normal sleep.
This message was last edited by the GM at 20:46, Fri 13 Jan 2023.