How to Disable BCL

[DespairFactor]

Here is how to disable BCL using various methods

init.d script

#!/system/bin/sh
sleep 40
echo disable > /sys/devices/soc.0/qcom,bcl.67/mode

kernel
fastboot flash boot nobclbullheadj.img

Download: http://renderserver.net/?dl=14f21584ff2eadceecaea497a2b2ae5b

What is BCL?
BCL polls the battery monitor system for various values such as voltage, current and temperature through the battery. This driver is meant to help prevent possible reboots, but with it removed on several devices we have seen no issues.

The way it prevents reboots is by setting thresholds and when the threshold is passed or tripped, it will throttle or unplug cores, which is detrimental to performance(we have seen it on the OnePlus Two and Nexus 6 so far). With that being said, wouldn't you truly like your device to run at its maximum performance and let the real hotplugging and thermal drivers work properly?

 

[stu5797]

To get it back do you do the same commands except change "disable" to enable?

 

[agentdr8]

Will give it a go and report back. Thanks!

 

[DespairFactor]

To get it back do you do the same commands except change "disable" to enable?

You can just reboot.

 

[dbrohrer]

Awesome. Thank you very much!

 

[DespairFactor]

I just made a kernel that disables BCL by default, it also has root access, not verity checks and no forced encryption.

http://renderserver.net/?dir=devs/DespairFactor/bullhead

 

[dbrohrer]

I just made a kernel that disables BCL by default, it also has root access, not verity checks and no forced encryption.

http://renderserver.net/?dir=devs/DespairFactor/bullhead

Excellent. Flashing now.

 

[TheBigOne71]

I tried flashing the img file that you posted and i get a gray screen that tells me there is a "Crash on the LK!" along with some other info. Any idea what happened or what i may have done wrong?

 

[dbrohrer]

I tried flashing the img file that you posted and i get a gray screen that tells me there is a "Crash on the LK!" along with some other info. Any idea what happened or what i may have done wrong?

Did you flash it via fastboot? I did this without issue. Also are you on the mdb80i build?

 

[TheBigOne71]

Did you flash it via fastboot? I did this without issue. Also are you on the mdb80i build?

Yeah, i did it via fastboot and I am on the mdb80i build :/

 

[bblzd]

So this would stop the device from throttling charge speeds over 36 and 38 degrees Celsius I'm assuming? Hopefully you don't fry your batteries charging at 3000mA while gaming.

 

[DespairFactor]

So this would stop the device from throttling charge speeds over 36 and 38 degrees Celsius I'm assuming? Hopefully you don't fry your batteries charging at 3000mA while gaming.

BCL is disabled on stock when charging, but not off charger.

 

[bblzd]

BCL is disabled on stock when charging, but not off charger.

Oh so this only affects the device when discharging the battery? Thanks for the info BTW.

 

[DespairFactor]

Oh so this only affects the device when discharging the battery? Thanks for the info BTW.

If you hangouts me I will tell you about it in more detail

Sent from Nexus 6P in the Despair filled Dark Side

 

[0.0]

Hey OP, would it be possible to create a boot.img with bcl off only, no root and not the other extras?

Sent from my Nexus 5

 

[QUEDRO]

If I have root, can I just use a command to disable it under terminal or adb shell?
what would be the command?

 

[ghettopops]

BCL is disabled on stock when charging, but not off charger.

So this is not a fix for slow charging ( or lack of rapid charge) while screen is on?

 

[DespairFactor]

So this is not a fix for slow charging ( or lack of rapid charge) while screen is on?

How the hell would we fix that with no source?

Sent from Nexus 6P in the Despair filled Dark Side

 

[ghettopops]

BCL is disabled on stock when charging, but not off charger.

How the hell would we fix that with no source?

Sent from Nexus 6P in the Despair filled Dark Side

I'm just trying to piece things together man.

 

[yy31228]

The link is unaccessible now. Could you please upload the nobclbullheadj.img again if possible?