Nexus 7 2013 Timur's Kernel USB OTG + Charging is here

[holmes5518]

Hello everyone.

On my 2013 Nexus running 4.4.2 and Timur's kernel I am having no luck with tethering the internet from my phone. I have read countless accounts of it being a flaw of Kit Kat..

What do you folks use as a solution? The in car tablet is useless for me without internet. I really don't want to go back to the old 2012 Nexus with the crap DAC it has just so I can use internet.

Ideas?

 

[smalltownbird]

So, need a bit of advice..

I mounted my Nexus 7 (2013) yesterday in my car, and i got a FM-Radio and JoyCon (to control steering wheels functions) connected to my USB powered hub.
Everything works fine, but my tablet doesn't charge as good as I want.. I got the Timur's Kernel installed, activated "USB Fastcharge".

I also got the "PowerGen" adapter that most people recommend.

On the way home from work, It didn't even charge 1% (about 20mins drive time), And the screen was on auto light (very low light level at the time).

Any idea? Is there any other configuration i need to go through?

Also, I'm not sure if the "Deep Sleep" works like it should.. Again it's activated in the small app, but it lose about 5%~ power during the night.
I haven't installed so many apps yet because I want to do it slow to make sure everything works..

Any idea?

From what I've seen on youtube, people claim that the kernel only drains 1-2% during night and charge up like crazy while driving.. heh.
appreciate some answers

Other than that, it works perfectly - so far.

I was having the same issue. I changed to a different USB cable and it charges extremely fast now

Sent from my HTC One_M8 using XDA Premium HD app

 

[alb3rt018]

Hello everyone.

On my 2013 Nexus running 4.4.2 and Timur's kernel I am having no luck with tethering the internet from my phone. I have read countless accounts of it being a flaw of Kit Kat..

What do you folks use as a solution? The in car tablet is useless for me without internet. I really don't want to go back to the old 2012 Nexus with the crap DAC it has just so I can use internet.

Ideas?

no problem with nexus 4 tethering to nexus 2013. do you phone provider charge for for hotspot? you need to have the right plan to tether to work and apn

---------- Post added at 01:42 AM ---------- Previous post was at 01:41 AM ----------

I've looked high and low and figured this would be the best place to ask this.

I'm experiencing some sever buzzing/hum/whine in my audio system when the tablet is charging. I've tried re-grounding everything, grounding the RCA jacks, different power adapters and cables but have had no luck. I can't post links yet, but if you search for "Nexus 7 2013 electrical buzzing" one of the youtube results shows exactly what I'm hearing.

I just donated for the kernel and have everything working except for this audio issue. It'd be a major waste of $40 if I can't fix this.

Has anyone had the same issue and resolved it? Any suggestions on other things I can try?

you need to find another ground spot.

---------- Post added at 01:44 AM ---------- Previous post was at 01:42 AM ----------

So, need a bit of advice..

I mounted my Nexus 7 (2013) yesterday in my car, and i got a FM-Radio and JoyCon (to control steering wheels functions) connected to my USB powered hub.
Everything works fine, but my tablet doesn't charge as good as I want.. I got the Timur's Kernel installed, activated "USB Fastcharge".

I also got the "PowerGen" adapter that most people recommend.

On the way home from work, It didn't even charge 1% (about 20mins drive time), And the screen was on auto light (very low light level at the time).

Any idea? Is there any other configuration i need to go through?

Also, I'm not sure if the "Deep Sleep" works like it should.. Again it's activated in the small app, but it lose about 5%~ power during the night.
I haven't installed so many apps yet because I want to do it slow to make sure everything works..

Any idea?

From what I've seen on youtube, people claim that the kernel only drains 1-2% during night and charge up like crazy while driving.. heh.
appreciate some answers

Other than that, it works perfectly - so far.

no problem on my nexus it got auto brightness on, my is always 100%. My tablet turn off when i turn off the car.

 

[Merkoen]

I was having the same issue. I changed to a different USB cable and it charges extremely fast now

Sent from my HTC One_M8 using XDA Premium HD app

Hmm. Thanks, will try that..
Perhaps the original Nexus charge cable will be good enough (if i find it).

Do you have the PowerGen adapter? Which one of the ports do you have the tablet connected to? "A" or "NA"

Thanks.

 

[t1mur]

Battery drain in suspend mode when using Torque and/or DashCommand

This is the one remaining cause of battery drain in suspend mode, resulting in ~1% discharge per hour (10% in 12 hours). There is actually nothing wrong with the two apps. The issue is also not with my code. What we have here seems to be an Android bug. Unfortunately, neither 4.4.3 nor 4.4.4 is fixing the problem.

What seems to happen, is that the particular Bluetooth profile in use by the two apps (Bt serial profile?), will NOT close down when airplane mode is activated. And because the Bt radio will stay ON, the CPU will not suspend.

v2 kernel has the ability to execute a user provided shell script (/data/local/usersuspend.sh) before FI-mode is trying to push the device into suspend mode. When I configure these two lines...

killall com.palmerperformance.DashCommand
killall org.prowl.torque

...the two apps will be terminated, their Bluetooth connection will be closed down, airplane mode will succeed, the tablet will suspend just fine and the battery discharge in suspend mode will be no more than 2%/24 hours (or up to 1% overnight).

A nicer fix may become available in the future. However, going about it like this shows, that the issue is being triggered by these apps. And battery drain is effectively prevented. Other Bt apps (probably using other Bt profiles) do not seem to be affected.

Edit: "killall" shell command requires BusyBox.

Edit: I made the script available here: https://timur.mobi/files/dcmd-torque/usersuspend.sh
Download to your PC and run the following commands to install:

adb root
adb push usersuspend.sh /data/local/
adb shell chmod 755 /data/local/usersuspend.sh

 

[t1mur]

Also, I'm not sure if the "Deep Sleep" works like it should.. Again it's activated in the small app, but it lose about 5%~ power during the night.
I haven't installed so many apps yet because I want to do it slow to make sure everything works..

Any idea?

From what I've seen on youtube, people claim that the kernel only drains 1-2% during night and charge up like crazy while driving.. heh.
appreciate some answers

Other than that, it works perfectly - so far.

Battery drain in suspend mode when using Gapps

Other than with the Bt issue (above), your tablet is going to suspend mode. But 3rd party apps (or maybe I should say: apps that are not part of the base OS) are waking it up on a regular basis and for short periods of time, using the rtc alarm wakeup mechanism.

There are two solutions:
1. Uninstall (or disable) a number of Gapps and services -or-
2. Disable their respective rtc alarms http://forum.xda-developers.com/showthread.php?p=52851202#post52851202

Option 2 is available now as part of the v2 beta kernel installer for 4.4.4.

 

[Merkoen]

Thanks. Will check it out.

 

[stamatis]

Thread closed.

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