I use a Dell laptop in my patient encounters. It is provided by my hospital group. It isn't too loud; my MacBook is louder, and I have heard quieter. I think there is more important stuff if you are going to use a computer as part of the session. I think most of my patients have come to expect it, but there is definitely an unspoken protocol. There are a few things in my experience which have helped:
1. The laptop is a tool, and should not be relied upon exclusively. I usually start the appointments without the laptop at all, but then grab it to get through the necessary stuff (side effects, mood/anxiety, med compliance, refill orders, etc)
2. Pre-chart as much as possible. You don't need to be doing this in session.
3. I'll usually also put it down to discuss other stuff; this can often times bring up a "doorknob" situation but I think it is good for doctor/patient relationship. If relevant I will write this into the note later.
4. Hopefully you are a touch typist. Eye contact is very important; I have seen some docs hunt and peck, but this really takes away from the session. Of course if you need to look at the computer to ask something (I haven't refilled trazodone since 2016, are you really still taking it?) actually helps facilitate the session.
Hope some of this helps