Develop Bugs

[Q] Batterydrain Wifi CM7 + DD-WRT

Hello,
My Desire runs CM7 (latest nightly) and is connected to the internet via a Linksys WNR160N Wifi Router with DD-WRT firmware on it. But this combination gives me massive battery drain, up to 8% per hour. I've changed the DD-WRT version a couple of times, but that doesn't solve the problem. I've used a lot of CM7 versions, but the problem is with all of them, so it has nothing to do with the nightly I run. The problem exits for a few months now.
When I flash a Sense rom on my phone, I have no problem. When I use a different Wifi router, there's also no problem. A fresh install of CM7 doesn't help. So it is just the combination CM7 and DD-WRT, but that's the combination I prefer to use.
Anybody an idea or solution to fix this?

CM7 use wifi N hack ? Maybe that is the cause. At least from what i've read activating wifi N can cause higher battery drain - and as you said you have wrt160N router which obviously has wireless N implemented.
You can try use other channel, Try OpenWRT instead of DD-WRT, Chech if you have enabled "best wireless performance" (Or similar) - In advanced settings of wifi.

Go into wireless and network then wireless settings. Press menu then advanced and change it to never, the wifi policy sleep thing.
Swyped...

Meaple said:
Go into wireless and network then wireless settings. Press menu then advanced and change it to never, the wifi policy sleep thing.
Swyped...
Click to expand...
Click to collapse
Also try to disable "Best wi-fi performance".

Thanks for the replies. But it has nothing to do with wifi sleep policy, which was already on never. Also changing wifi channels doesn't help. The wifi n hack also isn't the problem, i've used a vast range of roms over time, OpenDesire, Oxygen, Leedroid, RCMix and they had wifi n and there was no problem. Also changing wireless settings doesn't help (and this still doesn't explain why only CM has this problem and why there's no problem on other N routers) So I really have tried my fair share of solutions. I will try OpenWrt, I thought there was no build for my router, but there is. So I will try that.

Did you solve this issue?
Thor

Yes I did. I flashed the latest build of DD-Wrt standard and that solved it. Previously I had used a lot of different builds, but mostly mini and micro builds. So I don't know exactly what does and what doesn't work.

[Q] Annoying WiFi issue with many ROMs

Hi all,
I'm currently running latest CM10.2.0, and when I connect to any WiFi network, the initial negotiation speed is very fast.
From the moment I push the WiFi button, to the moment the WiFi is "connected", the duration goes from 2s to 4-5s max.
This duration includes internal WiFI activation and DHCP lease negotiation.
With all KK based ROMs I've tested (CM11, Carbon, LS, etc ...), or with F4K kernel (KK or JB, I've tested JB version on CM10), I'm having terrible negatiation times, generally next to 30s, but sometimes as high as 60s.
Having to wait up to 60s before being able to perform a mail check or a calendar sync that takes only 3s is very annoying.
What can I do to obtain a descent activation speed with KK or F4K JB ?
Is there a build.prop tweak or an init.d script that can speed the thing up ?
Tks

10.2.0 is not the latest!
There is already 10.2.1

ladislav.heller said:
10.2.0 is not the latest!
There is already 10.2.1
Click to expand...
Click to collapse
Sorry, my S4m runs CM10.2.1 indeed.
WiFi negotiation speeds has always been the same under all CM10 flavors (i.e. very fast), and always been the same under all CM11 flavors (i.e. very slow).

I'm on Carbon KK and negotiating time is close to zero. I actually don't even see it switch on. For instance, I use Llama and have it set up that in the night hours WiFi is turned off, unless the screen is turned on. I never had to wait at all during such an occurence until I had the internet connection.

jake3317 said:
I'm on Carbon KK and negotiating time is close to zero. I actually don't even see it switch on. For instance, I use Llama and have it set up that in the night hours WiFi is turned off, unless the screen is turned on. I never had to wait at all during such an occurence until I had the internet connection.
Click to expand...
Click to collapse
Tks for your reply Jake.
Thanks to your testimony, I guess my WiFi issue is due to some parameters that are specific to networks I'm connecting to.
All my tests are done on 2 different WiFi HotSpots, with different hardware, but both :
- Are running OpenWRT
- Have WPA2 PSK (CCMP) encryption
I will do some tests to see if encryption type or hotspot software has an influence on negotiation speed.

Vilo76 said:
Tks for your reply Jake.
Thanks to your testimony, I guess my WiFi issue is due to some parameters that are specific to networks I'm connecting to.
All my tests are done on 2 different WiFi HotSpots, with different hardware, but both :
- Are running OpenWRT
- Have WPA2 PSK (CCMP) encryption
I will do some tests to see if encryption type or hotspot software has an influence on negotiation speed.
Click to expand...
Click to collapse
The network I connect to most of the time has WPA2 PSK encryption. No clue about the OpenWRT

No WiFi Connection after Standby Time

Hi,
i have a strange problem with the latest CM based builts (for example Pure CM). I normally set the "Keep WiFI on during sleep" to "only when plugged in".
So after the phone will get into deep sleep, it will disconnect from my WiFi. This is "working" but it should reconnect after I turn on the screen and here is the problem. It is not connecting to a WiFi network.
It also cannot find any WiFi connection at all, even the ones in my neighbourhood are not in the list.
Anyone else facing this problem?

I'm not experiencing this issue, but i recommend you a solution. Use "Never" instead of "Only while charging". So it'll disable your Wi-Fi in deep-sleep, and when you want to use it, enable the WiFi by yourself. ( That' how i used it.)

wifi disconnects: Which ROM to use?

Hello All,
like other people I'm facing wifi disconnects when the phone screen is off. When it happens the phones switches to LTE although wifi signal strength is good. Of course wifi options are set to "always on". I had these wifi drops with the original OOS and with the official CM13 ROM. I assume both use the same wifi driver in the kernel.
Did anybody had the same issue and found a ROM which solved the problem?
Any help is much appreciated!

Freedomos seems to be stable with good wifi performance. Orion is also very good with connectivity.

Wifi, BT and poor coverage drain my battery

Hi, I have the nexus 5x since Oct 2016.
With wifi, BT or poor coverage, y consumption is high. Minimum of 1,5%/hour. With mobile data 0,2%/hour. Perhaps with poor coverage is normal, but I don't understand why it happens with Wifi (At home (2.4Ghz and 5 Ghz) and at work (5Ghz)). I have tested multiples cases.
I have had 7.0 (stock), 7.1(stock), 7.1.2 (Dev), without root and with root + (Franco kernel or ElementalX kernel) + naptime. I have desactivate Wifi scaning on location. I never see the flat line in battery graph with Wifi.
I use the app "gsam battery" to see the battery graph.The kernel and Android system are the first app suckers, I think it's normal. I don't see anthing unusual in battery graph. The mobile go to sleep mode correctly.
What would be the problem? What new tests I can do?
Thanks

Question: Are you using Project Fi, or any other carrier that allows for WiFi calling/texting?
To clarify: I don't think Project Fi is the culprit, but I may have a solution that I've been testing.

A common complaint that goes back to my N5 running Kit Kat. The fix was to force the device to only use 2.4Ghz Wifi, however since 7.0 Google has removed that option.
Changing router's or updating the router firmware has helped some in the past but not for me.
Does your device Doze properly on a mobile data connection also? And does wifi occasionally idle properly, say when switching back and forth between wifi and cell data? That's the case for me currently, and you know something's wrong when a 3G connection idles better than Wifi.

I'm not using Project Fi, or any other carrier that allows for WiFi calling. My carrier is vodafone, a normal carrier.
I have tested a router with 2.4Ghz only, but the problem persists.
Doze works correctly with mobile data connection and Wifi. I can see the mobile go to sleep mode correctly in both cases.
But in idle mode, wifi use a 1.5%/hour and mobile data 0.2%/hour, but I don't see nothings strange in the graphs or stadistics.
What I can I try?

NaxoForum said:
But in idle mode, wifi use a 1.5%/hour and mobile data 0.2%/hour, but I don't see nothings strange in the graphs or stadistics.
What I can I try?
Click to expand...
Click to collapse
Ya sounds exactly like the issue I was describing. The fix used to be to force the device to only pick up 2.4Ghz connections but Google took the option away ever since 7.0. Being on a network they only transmits 2.4Ghz doesn't help as the device is still listening to and picking up 5Ghz signals.
There is no known fix that I'm aware of. I don't think Google considers it their problem, they would likely say it's a router compatibility issue and tell us to upgrade our router firmware.