[Nexus 7 Android Development] kar10s:
Hi everyone!

I am using this rom for only few days, so, so maybe I am missing something? If so, could anyone show me what is wrong?

It seems that I have some wierd battery issue similar to that mentioned earlier:

Without reason (which I could detect), batery drain on my n7 almost doubled today (or that is how I "feel" about it) - I do not have any screenshots which would prove that, sorry :crying: But from my observation, after I have got that susspision, I noted the device status, chceked running processes (found nothing unusual) and after that it had lost around 5% battery in some 30 minutes while the device was not used (and had display turned off) :silly:

I have no new app installed / running that I was not using before I noticed this power drain. So, I am thinking, can this be somehow related to this ROM or the kernel I am using (curently it is the bricked-kernel from this rom installer)? Maybe some bug somewhere, like when the kernel forgets to switch off unussed cores or something?

I am thinking this way, becuse I noticed that my n7 is recharging realy slowly now (like when it is recharging from PC USB), even when it was connected to its original charger with its original cable - and I have read somewhere, that the kernel can control how the USB behaves - whether it will be charging batery or tring to comunicate while charging (which is causing slower recharging). That way I have managed to completly empty the battery while plaing some game (Knights of Pen and Paper, if that is important?) - the n7 complained about battery (14% left), so I connected the charger - I thought it will be fine, but after another +-30minutes, it died out without any warning (but it has produced some ugly screen artefact before diing out, so I thought the hardware burned out somehow. After some more laboring (and freaking out :eek:) I accidentaly managed to get to reboot it to fastboot and then back to system (well, for now I only saw 0% charging on the lockscreen before the device turned out, but I think it will be ok).

So, do you have any ideas what can cause this batery drain problem?

EDIT: I have now some power recharged, and have done some more testing, but I found nothing interesting. Well, except for that when I tryed to change anything in the "power setings"->CPU (or what is correct english name for it - I have got it translated in my N7), it completely ignored me at first time (except for the chceckbox for "set on startup"). So I suppose the kernel can indeed be the problem, because after another reboot it somehow started responding as expected and I was able to chage the governosrs, CPU max frequency, etc...

EDIT2: Well, just to complete the information - the power setting menu (well, anything in it, I mean) simply stops responding after some time (or maybe certain number (time?) of application is run (not realy sure why is that)) and only way (which I found) how to change anything here is to reboot the device. :crying:

/EDIT2

Also I have noticed that speed of recharging (while using the device) get a LOT (I would say 2-3x but I do not have enough data, that number is from short observation only) up when the CPU governor is changed to "conservative" or "powersave" (well, with that one the device is slugish, but I think that is suppossed to be so), so maybe the power problem is not in kernel itself but in the used "ondemand" governor... Anyway, I think that does not belong to this thread.

So, because I think that solves my problem for now, no more trashing from me here. Well, at least until something gets wrong again :o

/EDIT