yashsingh1/xdaforums huggingface dataset:
[Nexus 4 Q&A, Help & Troubleshooting] symnem:
moles did a good job calibrating the gamma in his halfbreed kernel but I found it hard to see in daylight...when I ran it through calibration I found it was around 3 which gives great separation but makes it really dark...that's why I adjusted the gamma in mine closer to 2.2.

I tried all of his posted settings with motley...it's really easy because motley has dynamic gamma; you don't even have to switch the screen on and off to test different configurations. I ended up making my modifications to a stock kernel after testing because I found motley to be unstable and a bit of a power piggy.
[Nexus 4 Q&A, Help & Troubleshooting] Sally600:
Am I correct to assume that we just flash these in recovery? Wipe cache and dalvic?
[Nexus 4 Q&A, Help & Troubleshooting] DroidXAce:
Yes, flash in Recovery with Wipe cache/dalvik-cache (not mandatory but recommended)
[Nexus 4 Q&A, Help & Troubleshooting] iamhacked:
I, too, find the contrasty calibration better than halfbreed. I'm using trickster mod on motley's kernel.
[Nexus 4 Q&A, Help & Troubleshooting] LTavaress:
I wanna go back to stock just to see the difference... anyone's got a zip?
[Nexus 4 Q&A, Help & Troubleshooting] sirxdroid:
http://goo.im/devs/paranoidandroid/roms/mako/

The one that ends in GoogleStock
[Nexus 4 Q&A, Help & Troubleshooting] sirxdroid:
Do these kernels change the min CPU freq? I see it's set at 384, but for the stock Google kernel it is set at 1026. Or does the AOSP kernel use 384 but the stock Google one went with a higher value?
[Nexus 4 Q&A, Help & Troubleshooting] sirxdroid:
It's most likely MPDecision the messes with the min. Sorry for the false alarm.
[Nexus 4 Q&A, Help & Troubleshooting] LTavaress:
I saw someone saying not to flash this zips cuz it could "burn" the screen. It isn't true, is it? Is there anything that could happen to my phone??
[Nexus 4 Q&A, Help & Troubleshooting] aresbv2000:
how does "2nd rev, 2nd variant" affect the battery life?is it worse...or is the same!please someone who test it let me know.thanks
[Nexus 4 Q&A, Help & Troubleshooting] snak3ater:
It isn't true.. Nothing would happen to your phone..
[Nexus 4 Q&A, Help & Troubleshooting] molesarecoming:
who said that? can i get a link? its bs though. :cyclops:

you can burn the screen but only if you max out on these values, which i didn't do. i kept them inside the margins i saw lg and el goog using.

several thousand people are using these kernels, i guess someone would have complained by now.
[Nexus 4 Q&A, Help & Troubleshooting] molesarecoming:
all the same.
[Nexus 4 Q&A, Help & Troubleshooting] aresbv2000:
I don`t know why...but after flashing this kernel on stock ROM,my light sensor is "slow" . What I mean...when I am in a very illuminated place...if I turn on the display...it takes about 4-5 seconds for the phone to illuminate correctly the display. Anyone facing this?Or...is my fault using this kernel on the stock 4.2.2 ROM?
[Nexus 4 Q&A, Help & Troubleshooting] e.ad2019:
Hi,

Just to say a big THANK YOU for bring back real colors to the Nexus 4.

I was so disapointed by the creppy washed out colors!

Thanks a lot,

Best Regards.
[Nexus 4 Q&A, Help & Troubleshooting] thesebastian:
I cant wait for Google to release new driver's to go back to halfbreed or another good color calibration.

One question...which of the calibrations here doesn't need AUTO Google stock brightness adjustment?

By now I know that Halfbreed needs more auto brightness.

Also tried the recommended Franco values (franco app and kernel with gamma adjustment) and it seems OK with auto STOCK brightness. But the grays are so black there.
[Nexus 4 Q&A, Help & Troubleshooting] anto.danny:
plz update the kernel..i cant download anytin when the screen is off...:crying:
[Nexus 4 Q&A, Help & Troubleshooting] sirxdroid:
See whether this helps: http://xdaforums.com/showthread.php?t=2072930
[Nexus 4 Q&A, Help & Troubleshooting] thesebastian:
Anyone knows motleys's "2nd REV" values for Franco Kernel app?

Try flashing this kernel:

motley_anykernel_422_nexus_4_build_49_with_prima_retention.zip

http://xdaforums.com/showpost.php?p=40215323&postcount=3046

You can use Franco Kernel app (it's not free) to easily edit Gamma values.
[Nexus 4 Q&A, Help & Troubleshooting] sirxdroid:
You can use Trickster Mod app to set kernel options, including RGB and Gamma (for supported kernels) and have them applied at each boot. It is free :)
[Nexus 4 Q&A, Help & Troubleshooting] apatal:
Hi guys, just wondering: can I use these kernels in CM10.1? Thanks.
[Nexus 4 Q&A, Help & Troubleshooting] DowntownJeffBrown:
I don't see why not...

Sent by my Kitteh he chews on muffins on my Sexy Nexi 4 using Tapatalk
[Nexus 4 Q&A, Help & Troubleshooting] LTavaress:
are there any zips to flash the LG standards (not the stock one but LG Optimus G one, for instance). I heard it's suppose to be really life-like...
[Nexus 4 Q&A, Help & Troubleshooting] AmitkumarBangad:
Flashing Kernel/ROM?

Hey Guys,

I am new to XDA Developers. This is my first post. I got my Nexus 4 few days back. As I compare it with Note2 colurs are definately too dull & washed out. Its really disappointing.

After some googling I came across this thread. I really want my Nexus 4 colours to look nearly like Note2 (AMOLED). I am interest in trying 2nd rev 2nd variant colour settings.

Please tell me the steps I can follow. right now my Nexus 4 is not rooted & runs on 4.2.2 stock ROM. Can someone guide me how do I flash 2nd rev 2nd variant colour settings? I am no techie, hence bear me and guide me :confused::)

Thanks!
[Nexus 4 Q&A, Help & Troubleshooting] thesebastian:
+1 anyone have the values for LG stock gamma? (Before Google calibration). Values for Franco/motley kernel.
[Nexus 4 Q&A, Help & Troubleshooting] danslecarton:
You can get them and much more here :)

http://xdaforums.com/showthread.php?t=2039607
[Nexus 4 Q&A, Help & Troubleshooting] LTavaress:
every app I used didn't display gamma control. Why??? I'm going crazy :confused: :eek: :cyclops:
[Nexus 4 Q&A, Help & Troubleshooting] danslecarton:
Are you on a custom kernel?
[Nexus 4 Q&A, Help & Troubleshooting] iamhacked:
If he's on a custom kernel it might be just the kernel not providing presets.
[Nexus 4 Q&A, Help & Troubleshooting] Onitsujj:
hi, i was wondering if this would work on aokp roms? or just on PA?

sorry if this question has been asked before.
[Nexus 4 Q&A, Help & Troubleshooting] molesarecoming:
you must unlock your bootloader, can be done with a simple console command but i guess the toolkits that you can download here can do that easier for you.

next step is getting a new recovery, thats the thing that you use to factory reset your phone when something goes wrong but the extended recoveries can install ZIP files, like this kernel here or roms. look for TWRP or CWM. i believe toolkits can do that again.

then you simply install the kernel and thats that.
[Nexus 4 Q&A, Help & Troubleshooting] molesarecoming:
all roms. doesn't matter.
[Nexus 4 Q&A, Help & Troubleshooting] molesarecoming:
gamma control is a rom scene hack. a kernel must expose that. i don't because i don't wanna mess around, i like simple. this is googles original kernel calibrated in 5 different ways, im sure you'll find your fit and that should basically end the need to worry about colors any longer. i use contrasty, haven't looked back. this stuff is complicated anyway, a calibration consists of many values you can shift up and down - without documentation. google kernel exposes rgb calibration, that should get you color correct.
[Nexus 4 Q&A, Help & Troubleshooting] iamhacked:
Do you plan to release a better version of contrasty or something?
[Nexus 4 Q&A, Help & Troubleshooting] molesarecoming:
i think its perfect. if google pushes new updates i will compile a new batch but they're all up to date. im not a kernel developer - i wanted to fix color thats that, no nightlies needed, and i don't see much need for extra functions or tweaks, googles kernel is fast and efficient what more is there to add.
[Nexus 4 Q&A, Help & Troubleshooting] Droid2drummer:
Hi moles. Just wanted to stop in and say kudos on a fabulous write up. BTW I shot professionally for a decade (almost) while maintaining/management of three portrait studios .. Just saw you post way back and thought its a really cool thing that more photographers are out involved in aosp/Android/tech devices...peace bro. Good work. And I Dont think I would've been able to patiently do what you did eyeballing each color to try and harness solutions to what our n4s are plagued by...its all good. Once more thanks for all the hard work from you and PA.
[Nexus 4 Q&A, Help & Troubleshooting] matus201:
Is this kernel exactly same as stock google kernel, but color calibrations? If yes, I found what I was looking for! If not, any advice where I can get completely stock kernel BUT with calibrated colors? Thanks :)
[Nexus 4 Q&A, Help & Troubleshooting] resynx:
Yes.
[Nexus 4 Q&A, Help & Troubleshooting] abhishek24dogra:
can this kernel be used with franco kernel..... as in can it be combined?
[Nexus 4 Q&A, Help & Troubleshooting] resynx:
The colors have been translated onto the spread sheet in my sig. You can set them as such using Franco's kernel.
[Nexus 4 Q&A, Help & Troubleshooting] sirxdroid:
I'm not sure that's actually possible. For example the very first entry in the spreadsheet contains the values 57 and 72 that cannot be set either via the Trickster or Franco apps as they are deemed invalid values.

Could the spreadsheet please be fixed so that it only lists valid values for the molesarecoming color profiles? I happen to like what's known as "PA Brighter" in the Trickster app for Faux color interface and I'd like to know the values that should be used for the Franco color interface. Thanks.
[Nexus 4 Q&A, Help & Troubleshooting] DirgeExtinction:
The spreadsheet has three tabs. One for Trickster, one for Franco's app, and one for Faux's; respectively.
[Nexus 4 Q&A, Help & Troubleshooting] sirxdroid:
I know it has 3 tabs and they are as follows, not as described by you:

http://xdaforums.com/showthread.php?t=2039607

The problem is the Gamma tab has invalid values for molesarecoming profiles that cannot be set either via Trickster or Franco app.
[Nexus 4 Q&A, Help & Troubleshooting] resynx:
Ah, I forgot that those are the old values of Franco's. No one has translated them over into the new versions yet =/

I'll have to look into it.
[Nexus 4 Q&A, Help & Troubleshooting] AmitkumarBangad:
Thanks!

Thank You so much. Let me root the Nexus 4 then I will be back again to this forum !!:D:good:
[Nexus 4 Q&A, Help & Troubleshooting] kerngehirn:
How do I get the halfbreed colors in Franco kernel?

The values in the OP are not sufficient.

I also tried a predefined setup by another user called halfbreed PA, but its almost as washed out as stock.

I really liked the halfbreed of the PA stock kernel.

sent from my nexus4 with PA, not speaking English natively. so you're welcome to correct me anytime.
[Nexus 4 Q&A, Help & Troubleshooting] sirxdroid:
Install Trickster, select PA Halfbreed profile in the TOOL screen.
[Nexus 4 Q&A, Help & Troubleshooting] kerngehirn:
Do I need the paid version? Can't see any color profile options ...

sent from my nexus4 with PA, not speaking English natively. so you're welcome to correct me anytime.
[Nexus 4 Q&A, Help & Troubleshooting] sirxdroid:
Hmm, I'm not sure, I have the paid version. Sorry about that. But I can tell you what values I get in terms of Franco for the PA profiles. I posted them here:

http://xdaforums.com/showthread.php?p=41525699#post41525699

Now you just need to find a way to set them, Franco's app, or an init.d script, use this as a starting point:

http://xdaforums.com/showpost.php?p=38125711&postcount=13816
[Nexus 4 Q&A, Help & Troubleshooting] kerngehirn:
Okay, thank you very much for looking that up for me again. But it's way to high for me right now. I'm learning, but if it's that complicated, I will stick to Francis recommended values for now.

Thanks again. :)

sent from my nexus4 with PA, not speaking English natively. so you're welcome to correct me anytime.
[Nexus 4 Q&A, Help & Troubleshooting] Wraithers:
Hey just wanted to know, when you said PA 3.55 with Franco optimized kernel has PA colours, did you mean Halfbreed? Just doing a quick check 'cause I haven't downloaded or flashed yet :)
[Nexus 4 Q&A, Help & Troubleshooting] eluspo:
Just got my n4. Do i need a rooted and unlocked n4 to flash zips? What do i need to calibrate my screen? Im still in stock 4.2.2
[Nexus 4 Q&A, Help & Troubleshooting] kerngehirn:
Please specify your question. I don't really understand what you mean. PA 3.55 has the new stock kernel with Franco tweaks. I think they kept the halfbreed colors though.

Unlocked it must be. You find several toolkits on xda. I recommend the n-cry toolkit.

sent from my nexus4 with PA, not speaking English natively. so you're welcome to correct me anytime.
[Nexus 4 Q&A, Help & Troubleshooting] DesmoDavid:
Ehi guys, can I use those kernel with the alpha build of PA3+ without any problems? :confused:
[Nexus 4 Q&A, Help & Troubleshooting] kerngehirn:
Of course you can. They're all stock kernel. Only colors are changed. Pick whatever you like.

sent from my nexus4 with PA, not speaking English natively. so you're welcome to correct me anytime.
[Nexus 4 Q&A, Help & Troubleshooting] DesmoDavid:
Ok thanks! Just tried the "contrast" one and I really like it. So, it just overwrite the colours settings?

Inviato dal mio Nexus 4 con Tapatalk 2
[Nexus 4 Q&A, Help & Troubleshooting] kerngehirn:
Any kernel you flash overwrites the old one.

sent from my nexus4 with PA, not speaking English natively. so you're welcome to correct me anytime.
[Nexus 4 Q&A, Help & Troubleshooting] DesmoDavid:
Ok, but I think it's not a smart thing overwrite the new kernel with the older (February!) version, don't you?

Inviato dal mio Nexus 4 con Tapatalk 2
[Nexus 4 Q&A, Help & Troubleshooting] FloMi:
It doesn't really matter.

If you like it-use it.

The New one had just a few optimizations by Franco.

The others are the kernels, which Google delivers with your n4 only with tweaked colors.

It's absolutely OK!

I like contrasts too, but now am using the New one (which actually had the colors of halfbreed-very nice too)

sent from my paranoid Nexus 4
[Nexus 4 Q&A, Help & Troubleshooting] kerngehirn:
It's not that they're "old".

They work as fine as the new one tweaked by Franco. It's the same kernel in fact. Franco did some minor changes as for example the possibility to undervolt underclock and so on.

sent from my nexus4 with PA, not speaking English natively. so you're welcome to correct me anytime.
[Nexus 4 Q&A, Help & Troubleshooting] DesmoDavid:
Ok, thanks for help! ;)

Inviato dal mio Nexus 4 con Tapatalk 2
[Nexus 4 Q&A, Help & Troubleshooting] itpromike:
Anyone know where I can find the original values from LG for the N4? Not the Aosp Google color values but the retail LG N4 color values?
[Nexus 4 Q&A, Help & Troubleshooting] sirxdroid:
See the post below, it has both the LG and Google presets, but you have have to match them to what the numbers are:

http://xdaforums.com/showpost.php?p=40859209&postcount=2
[Nexus 4 Q&A, Help & Troubleshooting] WRAITH07:
Anyone else having an issue with the zip files? I'm trying to get holoblue but when I try to flash it I just get a bad zip error
[Nexus 4 Q&A, Help & Troubleshooting] sirxdroid:
Did you check the md5sum after you downloaded it? goo.im has been having issues lately.
[Nexus 4 Q&A, Help & Troubleshooting] WRAITH07:
Cheers, for the reply.

I'd made a silly mistake of not checking the actual zip after it had downloaded lol (it corrupted). How embarrassing
[Nexus 4 Q&A, Help & Troubleshooting] x000x:
sorry if this has been asked already, but is there any other rom besides paranoidandroid that has one of these calibrations already incuded?

is there any other firmware that has one of these calibrations included?

lastly, if i use a rom that does not have these calibrationss already included, and then use this firmware... what happens if i update the rom? do i have to keep reflashing the calibration firmware every time the rom gets updated? or is it a one time thing? and i wont have to worry about it ever again?
[Nexus 4 Q&A, Help & Troubleshooting] iamhacked:
It's more of a kernel thing.
[Nexus 4 Q&A, Help & Troubleshooting] noobletsausecakebbq:
Bedt kernel is faux + his app to tweak everything
[Nexus 4 Q&A, Help & Troubleshooting] For_itembine:
franco settings but turn the saturation to 7 = perfect

but his kernel is laggy in the app drawer, which annoys me.
[Nexus 4 Q&A, Help & Troubleshooting] thesebastian:
Anyone know a way to have the Paranoid Android automatic brightness values for Halfbreed? I don't want to use 3rd party software.

It can't be added to Moles AOSP truly fast kernels?

That's because it's more battery optimized. So it has a little less performance to don't spend lot of battery while touching the screen.

P.s.: remember to apply revert fix after going back from Franco kernel to you stock ROM kernel. Otherwise you will have even more delays.
[Nexus 4 Q&A, Help & Troubleshooting] For_itembine:
the other stock 4.2.2 kernels like hatebreed color settings and co. all look horrible (in the lets calibrate mako thread, like a white film over the display)

FUUUUUuuu :S
[Nexus 4 Q&A, Help & Troubleshooting] thesebastian:
This is the best option but it hasn't the AUTO brightness values that PA ROM has.
[Nexus 4 Q&A, Help & Troubleshooting] mangomonkey00:
dont know much about this but can we put color and gamma values from lg optimus g kernel in our kernel will that work

just the color and gamma values
[Nexus 4 Q&A, Help & Troubleshooting] thesebastian:
Could you compile that for Nexus 4 stock Google ROM? :cowboy:

(With Paranoid Android values).

EDIT: I tried to do it by myself...but failed...

Downloaded "APK-Multi-Tool"

Modified Arrays.xml.....with this values:

https://raw.github.com/ParanoidAndr...rameworks/base/core/res/res/values/config.xml

<item>18</item>

<item>33</item>

<item>47</item>

<item>63</item>

<item>85</item>

<item>94</item>

<item>110</item>

<item>126</item>

<item>162</item>

<item>196</item>

<item>250</item>

<item>255</item>

And tried to install my failed .apk and had a bootloop...

So i restored with nandroid in CWM Recovery. :P
[Nexus 4 Q&A, Help & Troubleshooting] sneezy316:
Are there updated builds for these that will work with CM? Thanks
[Nexus 4 Q&A, Help & Troubleshooting] thesebastian:
I finally managed myself to change auto brightness values on framework-res.apk.

These are the stock values:

STOCK VALUES

14

28

37

51

71

80

96

108

144

181

254

255

I extracted this from PA GIT, but i'm not sure if they are correct.

Temp 1:

PA VALUE (APR)

18

33

47

63

85

94

110

126

162

196

250

255

Temp 2 (I'm actually using this one with Halfbreed):

PA VALUE (FEB)

22

38

47

63

85

94

110

126

162

196

250

255
[Nexus 4 Q&A, Help & Troubleshooting] ibr4him:
I flashed this couple months ago, now I want to go back to stock without losing anything, what should I do?

Thanks!
[Nexus 4 Q&A, Help & Troubleshooting] thesebastian:
You can just flash again the Stock Kernel....using fastboot...

Fastboot flash boot boot.IMG

You can get the Stock boot.IMG from the Google Nexus 4 factory image.
[Nexus 4 Q&A, Help & Troubleshooting] Chris016:
4.3

Since android 4.3 is out, will you release new versions to work for 4.3???
[Nexus 4 Q&A, Help & Troubleshooting] iamhacked:
Is there anything new in the calibration?
[Nexus 4 Q&A, Help & Troubleshooting] LTavaress:
can you get it working on 4.3? The stock colors are murdering my eyes

EDIT: I'm sorry now I saw that other people were already bugging you about it

---------- Post added at 04:31 AM ---------- Previous post was at 04:30 AM ----------

No... :(
[Nexus 4 Q&A, Help & Troubleshooting] Chris016:
There seems to be a slight difference... I noticed that some of the app icons aren't washed out as they used to be... But it wasn't as good as the halfbreed one
[Nexus 4 Q&A, Help & Troubleshooting] MariusWildfire:
In my opinion its a bit better then 4.2's calibration, but not compareable the halfbreed calibration :(
[Nexus 4 Q&A, Help & Troubleshooting] uosiumen:
Is there planned release of updated kernels for 4.3? I've flashed latest version and this remembered me how much stock Nexus colors are.
[Nexus 4 Q&A, Help & Troubleshooting] anto.danny:
+1 on 4.3 kernel we need it badly...Google stabbed us again :mad:
[Nexus 4 Q&A, Help & Troubleshooting] dr0o2o:
I hope for calibrated bright version of 4.3 kernel. Stock pa kernel with Franco modifications its too dark for me and i have feelings my phone acting better on google kernel.
[Nexus 4 Q&A, Help & Troubleshooting] nyyankees3511:
I miss the contrasty kernel. I hope this thread gets updated.
[Nexus 4 Q&A, Help & Troubleshooting] matus201:
Maybe we can do this ourselves? Are there any tutorials?
[Nexus 4 Q&A, Help & Troubleshooting] SweetwaterBurns:
I was going to try to build these this weekend if I have time just for something to do. There's a basic guide to setting up a build environment under Ubuntu here.

http://xdaforums.com/showthread.php?t=2021202

It's for 10.04 so some of the package names might have changed, but it would be a place to start if you would like to learn how to compile a kernel yourself. I know there are some guides for building on a Mac as well.
[Nexus 4 Q&A, Help & Troubleshooting] molesarecoming:
compiled them for JSS, but you'd probably want them for stock android (JWR), right?
[Nexus 4 Q&A, Help & Troubleshooting] supguise:
Forgot how awesome this makes the screen look. Dem colors... my gawd. Thanks so much bro; was checking this thread like a madman the past 2 weeks.
[Nexus 4 Q&A, Help & Troubleshooting] Sgace:
Stock JWR builds would be freakin awesome Moles!;). Love youre work:D

Cheers
[Nexus 4 Q&A, Help & Troubleshooting] gospodarvuk:
it would be a really really great if you could make JWR flashables...thank you very much in advance
[Nexus 4 Q&A, Help & Troubleshooting] apdude:
gerrit submits?

Did you try to submit the suggested change to AOSP? If, can you provide a link as I could not find any. -- Feedback from Google, LGE, .. would be interesting, IMHO.
[Nexus 4 Q&A, Help & Troubleshooting] molesarecoming:
i guess i just have to revert a few commits to get a JWR kernel. i try it later.
[Nexus 4 Q&A, Help & Troubleshooting] molesarecoming:
perhaps i should try for giggles and laughs. i'm pretty sure they'd turn it down with a snarky comment or two but why not - when i've got time for it.
[Nexus 4 Q&A, Help & Troubleshooting] thesebastian:
Fyi moles!
[Nexus 4 Q&A, Help & Troubleshooting] molesarecoming:
try this,

ROMS ON 4.3 JSS15J

http://download.paranoidandroid.co/roms/mako/pa_mako-Kernel-4.3_JSS15J_HALFBREED.zip

4.3 STOCK ANDROID (OR 4.3 ROMS ON JWR66V)

http://download.paranoidandroid.co/roms/mako/pa_mako-Kernel-4.3_JWR66V_HALFBREED.zip

i have no way of knowing if this works on stock android, it should. therefore better back up your phone before you install it.
[Nexus 4 Q&A, Help & Troubleshooting] Chris016:
Thx molesarecoming :)
[Nexus 4 Q&A, Help & Troubleshooting] Dark Fear:
is there any difference flashing these kernels (for example brighter) or applying "brighter profile" with fauxclock app?
[Nexus 4 Q&A, Help & Troubleshooting] Sgace:
Thnx Moles! Gonna try asap.

Cheers
[Nexus 4 Q&A, Help & Troubleshooting] dr0o2o:
Moles could you compile calibrated bright version of JSS kernel? I see many people complaining that halfbreed is too dark. Imho calibrated bright is what they looking for. I was using this one on every 3+ PA and noticed big improvement on details when watching photos or movies. Well everything is simply brighter with best colours i've ever seen :)
[Nexus 4 Q&A, Help & Troubleshooting] Ranguvar:
Thanks moles. Do these kernels have any other changes? mpdecision still active?
[Nexus 4 Q&A, Help & Troubleshooting] tarroyo:
How would u guys compare the new 4.3 changes to franco kernel's changes?
[Nexus 4 Q&A, Help & Troubleshooting] molesarecoming:
this is googles latest 4.3 kernel, untouched otherwise. mdp is active but your rom has to support it-