yashsingh1/xdaforums huggingface dataset:
[AT&T Samsung Galaxy S II SGH-I777] sound.wav:
Are you using the neak pro app? It has the adjustments you are looking for plus it goes towards devs so definitely grab that up plus gives functionality like set CPU
[AT&T Samsung Galaxy S II SGH-I777] jasvncnt1:
When you guys mention using ondemand..lulz..you set that in CPU control correct? (NEAK app) Just asking because i thought i would see those 2 under "NEAK options". Just want to make sure im checking in the correct location.
[AT&T Samsung Galaxy S II SGH-I777] sound.wav:
That's what I use to make my adjustments
[AT&T Samsung Galaxy S II SGH-I777] sound.wav:
Agreed, I have been trying to stick solely with neak app and so far it has met my needs. The only option I'm really missing from set CPU that you can't do on neak app is setting profiles like screen off to mention one. But... I do have ATFR enabled which makes my phone go into deep sleep so well that I now feel that I don't need a screen off profile

AOKP 4/28

NEAK kernel

Ondemand/noop

AFTR enabled

No uc/uv

All set through NEAK app

Edit for spelling
[AT&T Samsung Galaxy S II SGH-I777] Jonnyredcorn:
When setting governor's & schedulers with voltage control it gives you an option to set it as init.d or recommended what is the difference?
[AT&T Samsung Galaxy S II SGH-I777] ktoonsez:
One creates and init.d file and the other sets it using the app after reboot and even gives u the option to cancel. The NON init.d way is the safest to insure the phone boots up. Init.d's can cause the phone to NOT boot if ur phone doesnt like the settings.
[AT&T Samsung Galaxy S II SGH-I777] simone201:
Well from neak recovery u can always clean ur voltage control init.d file ;)
[AT&T Samsung Galaxy S II SGH-I777] ktoonsez:
+1 :D
[AT&T Samsung Galaxy S II SGH-I777] In3rDm0RetHeNu:
It worked for 2.0.3 but it doesn't let me change the gpu for 2.0.4.
[AT&T Samsung Galaxy S II SGH-I777] Karashta:
Working fine for me

sent from my magic shiny box using the tap tap tap
[AT&T Samsung Galaxy S II SGH-I777] mastergrillo:
Thx this solve my freezing issue also.
[AT&T Samsung Galaxy S II SGH-I777] Ghstudent:
1 hour 30 min screen time! with 3G on all day! I love you!
[AT&T Samsung Galaxy S II SGH-I777] ktoonsez:
Sorry I dont go that way, but we can still be friends:D
[AT&T Samsung Galaxy S II SGH-I777] Ghstudent:
Final result with 3 hours screen on time and data on all day with wifi on for about 5 hours.
[AT&T Samsung Galaxy S II SGH-I777] alacrify:
Facebook 10%? I, I don't know...what...to...say... :D
[AT&T Samsung Galaxy S II SGH-I777] cepsbow:
After 3 days. Still getting random hard locks... but I've since moved from stiflers settings to ondemand/noop with lesser UV. Still tinkering I suppose.
[AT&T Samsung Galaxy S II SGH-I777] alacrify:
Try it without the UV for a while - if the locks go away, you might have to live without them :)
[AT&T Samsung Galaxy S II SGH-I777] K Rich:
TBH, I'm running Siyah right now, and I've UV, and I actually haven't noticed much a difference compared to stock voltages. I'm running run my phone tomorrow with stock voltages to see if I actually lose any battery life. Of course, its not a perfect science.
[AT&T Samsung Galaxy S II SGH-I777] auTONYmous:
I got my first SOD today while talking, using Stiffler69's UV settings on conservative/noop. Gonna relax the UV a bit and see if that helps.
[AT&T Samsung Galaxy S II SGH-I777] Felix2402:
Some kernels are like wild horses bro. Just gotta let your phone tame it before you see results. Bad analogy i know.
[AT&T Samsung Galaxy S II SGH-I777] TechSilver13:
This is amazing. Super freaking fast and smooth. Siyah who?
[AT&T Samsung Galaxy S II SGH-I777] Dimatchka:
Sammy mic swap is the one for AOPK ROM? Or should I download the AOSP?
[AT&T Samsung Galaxy S II SGH-I777] nh5:
Seems to be in Deep Sleep more with this kernel then Siyah was getting more wakelocks seems to have quieted down. Running AOKP 4-21-12. Was on latest Siyah 3.1 but only had like 2 hours on that since that was also posted earlier today also. Thanks! liking the lulzactive/vr combo so far not erratic yet.
[AT&T Samsung Galaxy S II SGH-I777] Gutterball:
Use Aosp
[AT&T Samsung Galaxy S II SGH-I777] blaker13:
Its always hilarious to see people get mad when they hear things they don't want too...lol very entertaining. Thanks for the laughs, awesome work as well dev! Blazing fast and smooth as hell, some battery drain though...;)
[AT&T Samsung Galaxy S II SGH-I777] Galaxy_Cat:
Thank you for kernel; can I call you Colonel Kernel? Didn't think so... I am wondering what the GPU settings are, usually I can modify with extweaks. Recommend an App for that kind of system info?

This kernel is way way hot! Where's the user manual for settings?

Update: found in the i9100 General forums, a ton of stuff, been around awhile, I see... [TWEAK][N.E.A.K][14.3.2012]Rock Solid Config v1.1 for Lulz/VC app + Guide... Interesting that there's a stand alone APP for NEAK (says it's for international only, but I downloaded and opened it, no prob). This is definitely taking my geek-rom-kernel romance to a new level.

AT&T i777

ShoStock2.1
[AT&T Samsung Galaxy S II SGH-I777] drakester09:
Thanks for this, it seems to be a great kernel.

So far the best performing one I have tried. Hopefully battery life will be good. :)

No issues in CM9 latest so far
[AT&T Samsung Galaxy S II SGH-I777] Gutterball:
What the??? :D
[AT&T Samsung Galaxy S II SGH-I777] SeanHacker:
Leave it alone dude. Its obvious you have no clue what you are doing considering the fact that this kernel was released today and you're already posting battery results. Your battery results don't mean **** yet. You need to give at least 3 FULL CYCLES from full charges to even get a reading on battery. So leave these kinda posts out of this thread please. Thanks and have a good night. :D
[AT&T Samsung Galaxy S II SGH-I777] SeanHacker:
There's no such thing as resetting battery stats for our phones bro. Using apps or cmw option does absolutely nothing. Our phones do it automatically upon boot up.:D
[AT&T Samsung Galaxy S II SGH-I777] tylerdurdin:
I am STILL running Omega 5.2 flashed this, booted nicely no issues.... Smooth..... Holy **** smooth. Nice work man.... Nice work.

killing is my business, And business is good.
[AT&T Samsung Galaxy S II SGH-I777] :
Wow this kernel is fast... I miss the siyah kernel cwm though. No Saul booting on here.
[AT&T Samsung Galaxy S II SGH-I777] trell959:
Why does Neak sound so familiar..... I'll try soon ;)

Can you change charging current settings?
[AT&T Samsung Galaxy S II SGH-I777] nismax:
Battery omg my battery. I think this kernel eaten my battery help. For the guy thats crying about battery life. One great thing about android is you can always go back if you are not happy with rom, kernel, modem etc. Why panic ?
[AT&T Samsung Galaxy S II SGH-I777] nismax:
Ktoonsez thanks for your hard work.
[AT&T Samsung Galaxy S II SGH-I777] MarioAZ:
No one is crying bro get your facts straight just saying what I see don't take it personal just giveing feed back. Awesome kernel btw super fast and smooth
[AT&T Samsung Galaxy S II SGH-I777] Dimatchka:
First impression : very smooth and very snappy I can scroll through 50 posts on tapatalk without any lag, very nice :D:D:D keep up the good work!!!
[AT&T Samsung Galaxy S II SGH-I777] nismax:
And everyone is telling you to calm down and wait, just like rest of us. Thank you.
[AT&T Samsung Galaxy S II SGH-I777] biofilter69:
my phone burst in to flames after flashing.
[AT&T Samsung Galaxy S II SGH-I777] SETdown:
I m running on NEAK with the config posted for bajee11 in the kernel test post:

http://xdaforums.com/showpost.php?p=25102919&postcount=3

*Governor/Scheduler Used: Lulzactive/VR

lulz settings:

inc_cpu_load = 80%

pump_up_step = 2

pump_down_step = 2

up_sample_time= 28000

down_sample_time= 40000

screen_off_min_step= 3 (500mhz)

*CPU:

200Mhz (875mv)

500Mhz (950mv)

800Mhz (1000mv)

1000Mhz (1075mv)

1200Mhz (1175mv)

* GPU :

133Mhz (850mV)

267Mhz (950mV)

* NEAK Config:

SCHED_MC (Enabled)

AFTR Idle Mode (Enabled)

Ext4 Boost Optimisations (Enabled)

Is a Rock Solid for me :D
[AT&T Samsung Galaxy S II SGH-I777] Colton127:
AOKP 5.1, N.E.A.K latest:

9 hour on battery, 1 hour of screen-on time, 60% battery remaining

Underclocked to 800mhz and undervolted, rock solid.
[AT&T Samsung Galaxy S II SGH-I777] Jonnyredcorn:
whats aftr mode do with lulz/vr?
[AT&T Samsung Galaxy S II SGH-I777] ktoonsez:
AFTR(ARM OFF TOP RUNNING) mode in cpuidle driver for EXYNOS4210. L2 cache keeps their data in this mode. This patch ports the code to the latest interfaces to save/restore CPU state inclusive of CPU PM notifiers, l2 resume and cpu_suspend/resume.
[AT&T Samsung Galaxy S II SGH-I777] K Rich:
Yeah.....that makes perfect sense.....:what:
[AT&T Samsung Galaxy S II SGH-I777] cepsbow:
Well, you asked for it lol.
[AT&T Samsung Galaxy S II SGH-I777] ktoonsez:
LOL, think of it as an IDLE mode agent. Use it if your phone likes it, if you start having SOD's, take it off.
[AT&T Samsung Galaxy S II SGH-I777] Jank4AU:
That doesn't sound very good with only 1 hour of screen on time...maybe average at best, especially uc to only 800.
[AT&T Samsung Galaxy S II SGH-I777] Hobbbez:
Trying this out, but I can't figure out where to edit GPU settings or the specific lulz settings. Where can one do this? Thanks!

Edit: Think I figured it out. Thanks anyways!
[AT&T Samsung Galaxy S II SGH-I777] In3rDm0RetHeNu:
Here is a link to my screen capture which shows that I do not have the GPU & Charging menu in Voltage Control Extreme.

How did you figure out? I know about the lulzactive app for the lulz settings but I personally like Voltage Control.
[AT&T Samsung Galaxy S II SGH-I777] xcentrik05:
I think you need the extreme version? Maybe.

You could also dl the neak app.
[AT&T Samsung Galaxy S II SGH-I777] xcentrik05:
Yeah, doesn't sound very good. My battery was eaten alive when I had wifi and GPS signaling on. Might want to look for any apps causing wake lock. When I used this kernel I enabled conservative and used it with noop. I enjoyed the ability to go down to 100mhz until entropy pointed out it uses the same voltage as 200mhz and just creates an extra step to scale through. I also uc to 1000
[AT&T Samsung Galaxy S II SGH-I777] In3rDm0RetHeNu:
I have the extreme
[AT&T Samsung Galaxy S II SGH-I777] xcentrik05:
Try downloading the neak app. I know you can modify it there
[AT&T Samsung Galaxy S II SGH-I777] In3rDm0RetHeNu:
Only with the pro. ( 100th post yay )
[AT&T Samsung Galaxy S II SGH-I777] TEXASMADE1978:
I thanked ur post on accident, sorry

TASK AOKP RUNNIN' GSII BEAST, ALL DEVS AREN'T CREATED EQUAL!!
[AT&T Samsung Galaxy S II SGH-I777] jasvncnt1:
If you havent already, try setting NEAK to ondemand/noop. See if that helps. Dont know what you have it set to now...
[AT&T Samsung Galaxy S II SGH-I777] bonnatron:
Same thing with phone-bricker
[AT&T Samsung Galaxy S II SGH-I777] Eckyx:
After some reading, I have seen people suggesting not to use AFTR and SCHED_MC together. I also read that SCHED_MC might be redundant because of dynamic hotplugging. What's the truth behind this? I'm still trying to understand these settings.

---

Also, what does checking the "Conservative Governor" box do in the Configurator? I already have Conservative available to me.

The settings I'm currently using are:

Lazy Gov. + NOOP

SCHED_MC

AFTR Idle Mode (is LPA automatically enabled?)

Ext4 Boost Optimisations

After switching from Task's CM9 kernel, I was immediately impressed with the increase in responsiveness.
[AT&T Samsung Galaxy S II SGH-I777] SETdown:
Hi,

This is a nice read to explain it

http://xdaforums.com/showthread.php?p=23139300#post23139300

Maybe ktoon or simone can help you better on this questions ;)
[AT&T Samsung Galaxy S II SGH-I777] Eckyx:
Thanks!

I noticed with Lazy my CPU wasn't downclocking like it should so I've gone back to conservative. I also found this, in regards to SCHED_MC:

So I've removed that.
[AT&T Samsung Galaxy S II SGH-I777] Colton127:
I'm running AOKP 5.1 with the latest N.E.A.K kernel and are encountering a bug. Sometimes when I unlock my phone, the brightness setting resets. This is extremely annoying, because I'm out in the sun sometimes and it is nearly impossible to see the screen on low brightness in lots of sunlight, making it a huge pain to turn the brightness back up.

Is this because of the kernel or AOKP 5.1? Also, is there any fix?

Thanks

EDIT: This only started occurring after I updated to AOKP 5.1 and flashed the latest N.E.A.K kernel.
[AT&T Samsung Galaxy S II SGH-I777] ktoonsez:
It is the ROM.
[AT&T Samsung Galaxy S II SGH-I777] dandrumheller:
logs for freezes?

@Ktoonsez:

I finally decided to jump over to the NEAK kernel earlier this week - wanted to see what all the fuss was about :-) I'm currently running Tasks 5/1 release of AOKP. While the performance increase was a welcome upgrade, I, like some others who have posted previously, have run into some device lock-ups.

Initially I tried settings for what I hoped would give me the performance I was looking for: AFTR enabled, lulzactive governor and VR scheduler. This led to 3 quick screen-on lockups within a short (maybe 30 or 40 minutes) period of time.

I tried backing off on the settings, first disabling AFTR, then going to conservative governor and noop scheduler, and finally to ondemand and noop. The frequency of the freezes seemed to improve some with each change - to the point that 2 days ago I got through the day with only 3 freezes with the ondemand/noop setup.

In all cases, these were screen-on freezes - touch panel and keys unresponsive. power button long-press to reboot the phone required. I had to switch back to Task's kernel for the last 2 days as I needed a little more reliability in the phone for work. But I'm thinking about going back to NEAK for the weekend at least to play around some more.

Are there any logs I can grab, assuming I get more lock-ups, that could help you with them? So far, they seem to be somewhat random, though all have happened either immediately or shortly after device activity (immediately after phone calls or pausing music) or shortly after exiting apps.

Thanks,

DD
[AT&T Samsung Galaxy S II SGH-I777] ktoonsez:
First thing you can try is to hook up to PC and see what "adb logcat" gives you. If you dont get anything, reboot and grab the "last_kmsg" file from /proc directory. More than likely you will have to switch governors/scheduler to a combo that ur phone likes. With 4 schedulers and 3 govs, that is alot of combos, lol:D
[AT&T Samsung Galaxy S II SGH-I777] alacrify:
Last time mine choked (on my alarm, which could have been bad in other circumstances) there was no last_kmsg when I had to hold power to reboot. Maybe if it rebooted itself?

Open to alternatives, but I was on AOKP 5-1 and reflashed back to his base because I couldn't find a stable mix - I was at ondemand/noop when the last one happened, which I think is as "low as I could go".
[AT&T Samsung Galaxy S II SGH-I777] dandrumheller:
Thanks...I'll try grabbing a logcat this weekend (if I run into freezes). I actually tried several other gov/scheduler combos...not all, but I did run all schedulers on ondemand and conservative. As alacrify said, I thought last kmesg would get wiped on reboot, so I never checked it...I'll look at that a well....
[AT&T Samsung Galaxy S II SGH-I777] eep2378:
Are you using the Lulz app? I had a few lockups/freezes as well. Since I started usuing the Lulz app(have to be on lulz governor) I haven't had one since. I'm on AOKP 5/1 build too. Look at Setdown's post at the top of this page for more info on the app and some decent settings to use :D
[AT&T Samsung Galaxy S II SGH-I777] dandrumheller:
Wow, I learn something new here every day. I didn't know there was a lulz app until you posted this - musta missed it before. I assume you are referring to "lulzactive" by tegrak in the play store. I'll give that a shot this weekend too. So far just used the NEAK pro app. I have VC installed for use with other kernels, but have frozen it with TiBu when I was on NEAK kernel to attempt to avoid the two conflicting with each other...

As far as the other settings posted - I was aware of them, but had avoided using them to this point - didn't want to "muddy the waters" so to speak as far as trying to troubleshoot. To this point with NEAK, I have done no OC, no UV, and no tweaks to GPU. Just gov/scheduler adjustments, and AFTR idle on/off.

thanks for the continued input and suggestions guys!
[AT&T Samsung Galaxy S II SGH-I777] eep2378:
Yup, thats the one from Tegrak :)

I'm using the Neak free app(for AFTR, EXT4 boost), Lulz app and VC all together without issue. The Neak pro app has some other features(OC, UV, etc) but for me VC has always been more reliable than even SetCpu and others. I'm on default VR/lulzactive combo and its been rock solid.

Also the Lulz app is nice because you can tweak the various settings for more battery vs more performance with easy sliders to see what works best on your device. Posted settings are simply recommendations. If you're getting slowdown, freezes, etc then you can tweak for more performance. :)
[AT&T Samsung Galaxy S II SGH-I777] kwanbis:
Exactly my problem. I reported it in AOSP thread, to task650, but he says it is the kernel.

I do not want to go back to the CM9 kernel or other, cause this is the fastest one, but the brightness thing is really annoying.

Any ideas?
[AT&T Samsung Galaxy S II SGH-I777] BestInGalaxy:
Yeah its definitely the NEAK kernel that's causing it for me. After no one answered my help, I switched back to Siyah and the problem is gone. Still looking for the answer, as I also want to use this kernel.
[AT&T Samsung Galaxy S II SGH-I777] ktoonsez:
I will look into it this weekend.
[AT&T Samsung Galaxy S II SGH-I777] kwanbis:
thanks ktoonsez, really appreciated, since I love your kernel.
[AT&T Samsung Galaxy S II SGH-I777] lilbigdude1:
Is this kernel effected by the Samsung death bug like some others are.....

http://xdaforums.com/showthread.php?t=
[AT&T Samsung Galaxy S II SGH-I777] ktoonsez:
Ur link is not working. R u talking about the people that bricked there phones?
[AT&T Samsung Galaxy S II SGH-I777] lilbigdude1:
This is a quote from entropy

Reinbeau asked me to summarize the situation with ICS leaks in a way that can be stickied, so here it is:

DO NOT FLASH OR WIPE USING ANY ICS REPACK

The list of "known safe" kernels is below in this post - there are currently two known-safe ICS kernels, but only two.

These kernels are fundamentally dangerous. Samsung introduced some sort of bug in the eMMC driver that can permanently damage the eMMC flash storage of the phone. This leads to unusable partitions at best, and at worst a hardbricked device. The nature of the failure is so severe that the usual method for hardbrick recovery (JTAG) is unable to recover devices damaged in this manner.

Kernels that have been confirmed affected are:

All ICS leaks for the Samsung Epic 4G Touch (SPH-D710)

All ICS leaks for the Samsung Galaxy Note (GT-N7000)

XXLPY official ICS release for the Samsung Galaxy Note (thanks to Chasmodo for sacrificing his device to find this out)

UCLD3 ICS leak for the AT&T Samsung Galaxy S II (SGH-I777) - Other leaks may also be affected

Kernels built using the most recent SHW-M250S/K/L official source code release as of May 3, 2012 - This includes SiyahKernel 3.1rc6 for GT-I9100 (all other Siyah releases are safe)

Damage is not guaranteed - it may only affect a small percentage of users, but even a 5% chance is far more dangerous than the effectively 0% chance of hardbricking due to kernel bugs in safe kernels.

Kernels that have been confirmed safe:

All known Gingerbread kernels for the Galaxy Note and other affected devices listed above

Kernels built from the GT-I9100 Update4 source code release - this includes XplodWILD's CM9 release and my DAFUQ release, hopefully more kernel choices will become available soon

If you are running an affected kernel:

STOP USING IT IMMEDIATELY. FLASH A SAFE KERNEL USING ODIN/HEIMDALL.

DO NOT wipe in recovery

DO NOT flash anything else in recovery

In general, DO NOT use recovery at all

Right now, what we know:

Some people can wipe with affected kernels as often as they want without problems. Just because you didn't brick, DO NOT advise other users that they will be OK.

Based on reports from the Epic 4G Touch community, some people can wipe/flash 20-30 times before hardbricking - Just because you didn't brick once, DO NOT continue flashing with an affected kernel

The source of the problem is somewhere within the changes between I9100 Update4 and SHW-M250S Update5 - https://github.com/Entropy512/kernel_galaxys2_ics/tree/m250s_dangerous

What we don't know:

Exactly which source commit above is responsible

How to determine if a future kernel or source release is safe without putting user's devices at risk - You only need to reproduce the problem once to be hosed.
[AT&T Samsung Galaxy S II SGH-I777] ktoonsez:
That's what I thought u were talking about. No we did not use the update 5 stuff that is suspected to be the culprit
[AT&T Samsung Galaxy S II SGH-I777] lilbigdude1:
OK cool....I really like this kernel, with that being said, quote 3 in the change log is?

I'm not trying to be disrespectful, I'm just trying to understand, I like my 600 dollar device.....:D

OK...I've done more reading, I think I get the gist of the subject you only used the wifi update and not the kernel source update.
[AT&T Samsung Galaxy S II SGH-I777] justin860:
This is by far the best kernel on here but it always causes my phone to freeze no matter what settings I do and I am not under volting
[AT&T Samsung Galaxy S II SGH-I777] Colton127:
This kernel is great other than the usual lock-ups (mainly on lock screen, sometimes the phone freezes when unlocking the phone), and the brightness issue mentioned by many users here (including me).
[AT&T Samsung Galaxy S II SGH-I777] Jonnyredcorn:
This kernel was running great on aokp 5/1 with my previous phone before I broke it. I was worried the refurbished replacement would be unlucky and not be friendly with NEAK. Fortunately the replacement has been awesome and everything is running better than ever.
[AT&T Samsung Galaxy S II SGH-I777] Phalanx7621:
Yup. I love the kernel as well. But I just can't run it. (I'm on AOKP). And I suffer from the lock ups . Never had a SOD but about 1 out of 4 times I unlock the phone it'll freeze while unlocking and i have to reboot. Also sometimes it locks up while typing and I have to wait for it to catch up. Usually takes 30 seconds. But it doesn't happen constantly. Only it seems when I NEED it to work lol. But it does run so damn fast and battery life for me was great too.
[AT&T Samsung Galaxy S II SGH-I777] JmPTaz09:
Running great for me on ics slim 3.6 ported rom. Really nice and smooth, fast, no lock ups or freezes and nice battery. Running at stock settings - lulzactive/vr
[AT&T Samsung Galaxy S II SGH-I777] eep2378:
Similar experience here with this kernel. Its funny, when I "need" to use the phone it locks up on me, otherwise it flies. I'm staying on Task's updated kernel(5/12 build) and see what kind of battery life I can get(its already looking solid) :)
[AT&T Samsung Galaxy S II SGH-I777] Virus1x:
See i'd do this but no LULZ Kernel :|

Lulz is my battery Baby
[AT&T Samsung Galaxy S II SGH-I777] abraxo:
Flashed from a zip file I found on Google code. I think its the international version since only home button works. No one has drop box links?
[AT&T Samsung Galaxy S II SGH-I777] sound.wav:
Try an app off the market called download all files it works really well and its free. Hope that helps
[AT&T Samsung Galaxy S II SGH-I777] abraxo:
Finally flashed. Also got the brightness issue
[AT&T Samsung Galaxy S II SGH-I777] Najuto9tail:
Kernel is the best on battery life but brightness dims... It should be fixed when ever you have the time ;)
[AT&T Samsung Galaxy S II SGH-I777] abraxo:
Is it possible that the reason battery life is so great is because of the brightness issue?
[AT&T Samsung Galaxy S II SGH-I777] SeanHacker:
nevermind
[AT&T Samsung Galaxy S II SGH-I777] evostevo1:
Lol
[AT&T Samsung Galaxy S II SGH-I777] ktoonsez:
So r all u guys saying it never goes to full brightness or it is just slowing getting up to full brightness?