New device (few days old), newest (bora?) OS version.
Just answer to question(s) you can. After these are answered, I'll edit my post to make it easier for people to find the answers.


--- #1 Backlight flicker ---
The screen's brightness varies semi-rapidly in all situations (small variations, not a big one)

- Very barely seen (if at all, maybe my brain just makes me see it now that I know) when brightness set to very bright
- Better seen when set to very low
- Best seen when the "screen dimmer" kicks in which sets the screen brightness a notch lower than can be set by the utility.

- Clearly seen when the "screen dimmer" kicks in, the N800 is in charger AND charging (this is the first time I noticed it.. Just have some application running with white areas, as on top of those colors the brightness variation is seen best)

Question: Is this with your device as well? Report! (Think this is normal?)
Answer: It is normal. For details, see post #3.

Side-question: Does the charger emit odd sound (for ~5 seconds) when you
plug it off the wall outlet (just plug it it, keep it in for a moment, take it out and keep it near your ear) .. No, I'm not a "sound freak", just worried about new stuff.
Answer: Not answered yet. (I got my hands on same Nokia charger model and it exhibits the same sound effect, so normal?.. Still waiting input from the community

Side-question: I read somewhere that I can set the screen brightness manually by echoing values to some /sys/ (was it?) file, but can't remember and can't find the post.. Anyone?
Answer: Read http://fanoush.wz.cz/maemo/#backlight. See post #3 for details.




--- #2 Cursor jitter ---
- When I scroll a page in the browser (hold the scrollbar), it jumps up and down a bit (no, not hand shake as it doesn't do this in Sketch or when pressing something longer, to make the menu appear)

Question: What's that? the touch screen doesn't seem to register that "jitter" anywhere else than when scrolling, odd.
Answer: It is normal. See post #2 and #3 for details.


Thank you guys and/or girls, these answers help me sleep a bit better at night.

My N800 had the touch screen issue with the old firmware.

The new firmware solved that...the screen is very responsive now....but it has the jitter issue when I hold the scroll bar at a static point. I just assumed that to fix the non-responsive screen issue, this new firmware makes the screen very sensitive, so micro-movements (which a human cannot sense) causes the screen image to jitter. Ok, that was just my opinion...someone let me know if this can be solved...



Luke

The brightness issue happens both with n770 and n800. It is more visible when the brightness is low, when on charger or maybe also when wi-fi is transferring data (just my guess). With n800 it is worse, that's probably why the lowest brightness available on n800 is brighter than on n770, but at least the screen is silent.

as for setting the brightness - for n770 this is included in my mmcplus enhanced kernel and similar code works also for n800 see http://fanoush.wz.cz/maemo/#backlight

The touchscreen in n800 is known to be oversensitive/erratic. That's why in previous firmwares the output from it was heavily filtered in software to remove errors. Yet it was not ideal and you still had some spurious pen release events (can be nasty in scummvm when you try to move cursor without generating button press, with n770 there is no such issue). Looks like in newest firmware they finetuned the filtering and allowed better sensitivity. The jitter is the result. I still think current state is much better then before and almost OK.

Yes I am also able to see the screen flicker on the lowest brightness setting or when the dimmer kicks in.

I don't think I can hear any sound from the charger when taken off the wall outlet. I have the AC-4U which I believe is a North American model.

Also had the touch screen sensitivity issue (right side) with the previous firmware but seems to have been much improved with the new software release. However, I can also observe scrollbar related jitter (held statically at a position) and in addition, can hear pen release/tap sounds some of the times when dragging the right vertical scrollbar (does not affect scrolling most of the time).