Wifi turning off in sleep mode
I am noticing over the last few days that occasionally when I pick up my phone after it's been 'asleep' (screen off) for a while, that the phone has fallen off my Wifi network and gone onto 3G. This is kinda annoying as I have a very limited 3G data plan and don't want to use it when I don't have to. Does anybody have any ideas what might be causing this?
I'm running Cyanogen 5.0.6, and am using SetCPU, and have a sleep profile set up of 499/245 (set up as ondemand) and was wondering if this could be causing it? Is it possible that when the the CPU is running at that speed it just shuts off the Wifi? That said, it doesn't happen every time, so I don't know what it is. It could be something completely different, so if anyone has any ideas please let me know.
- 05-18-2010, 01:19 PM #2
- 05-18-2010, 01:49 PM #3
In fact it may even be a positive affect, as using the 3G radio probably takes more power. Eric's Corner: Which uses more power? WiFi or 3G?
- 05-18-2010, 05:24 PM #4
Hey, thanks a million, i changed that setting and hopefully it'll solve it. I must have just not noticed it before. I will update again in a few days in case anything changes.
On a side note, RogerPodacter: how the hell did you get 12hours out of the battery at all, never mind having 89% at the end of it. I burn through battery, though I think CM is part of the problem to be honest.
- 05-19-2010, 11:58 AM #6
- 05-19-2010, 01:44 PM #7
That's pretty reasonable for a smart phone these days. I have wifi on all the time and I'm in wifi range most of the day.
One thing that helped me was use Gmail, or Imap servers that support imap-idleD, (and maybe exchange?), and avoid pop mail, and avoid polling: use push.
It take way less power to keep a socket open in a wireless environment than it takes to poll a server. k-9 mail is awesome for this.
Avoid pointless social network location logging. - Nobody cares where you are, and they keep the radio needlessly busy.
I use the phone a LOT. Its not like I baby it.
Stock att model.
- 05-19-2010, 02:25 PM #8
WCDMA preferred has the phone try to find 3G directly. This takes more power until a connection is established.
You can verify this in the 4636 display, below the Run Ping Test button. You will see the Network Type say EDGE, then, after a bit, it will switch to HSPDA.
If your phone is near your computer speakers, you will hear edge chatter as it obtains its Preferred Roaming List. You may periodically hear a lot of EDGE chatter if you have nothing requiring a data channel running, because it might drop to edge and stay there for unexplained reasons.
Depending on your towers and service availability, you may see no difference in this at all. I live in a strong 3G area, and this does not help me at all. In fringe 3G areas or in 3G areas where there are a lot of 3G phones (cities, near schools, etc) this will help quite a bit.
In Edge only areas it saves a lot of battery by not searching for HSPDA when it does not exist.
Note: I also see something of a speed test hit on GSM (PRL), but this may be just the speed test app doing odd things.
- 05-19-2010, 02:26 PM #9
I routinely get ~36-40 hours out of a full charge on my N1. In the article I linked there's a picture of my phone 15 hours off the charger with 73% battery still left.
- 05-19-2010, 02:47 PM #10
- 05-19-2010, 02:53 PM #11
- 05-19-2010, 06:47 PM #12
Oh: one more thing I've noticed with GSM (PRL) mode is that the phone will occasionally drop to No Signal mode. I've NEVER seen that while running HSPDA Preferred. (ATT version of N1).
I'm going to stay on GSM/PRL for a day or three to measure battery performance, but if that keeps up, I'm going right back to the default.
- 05-19-2010, 07:25 PM #13
i think it depends on the network. because there are some people who dont see any increase whatsoever with this setting. and then others see a tremendous difference. like me. i lost 11% in 12 hours, i mean, how crazy is that? and it was on 3g the whole time.
- 05-20-2010, 03:46 PM #14
Re: Wifi turning off in sleep mode
Just to say, changing that setting to stop wifi sleeping worked perfectly. The gsm prl thing didn't really seem to make a battery difference , but then again I live in strong 3g.
Thanks a million to everyone.
Sent from my Nexus One using Tapatalk
- 06-16-2010, 09:37 AM #16
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However I have a question that requires a bit of info first:
My carrier is a WCDMA only carrier (it has the best WCDMA coverage in my country), but from the very beginning it has had a roaming agreement with another carrier, allowing customers to roam on said other carriers (truly excellent) GSM net when no WCDMA coverage is present.
However as my carrier's WCDMA coverage has become better and better, they have recently made the decision to cancel the roaming agreement in select areas (I'm only sure of one city where they have cancelled the roaming agreement).
My question is then:
How will my phone react when set to GSM auto (PRL) when no GSM coverage is present? Will it be impossible for it to register on the network as no GSM network is available to connect to and retreive the PRL from?
Thanks in advance