yashsingh1/xdaforums huggingface dataset:
[One (M8) Android Development] simondavies315:
When using eXcaliBur kernel on Paranoid Android 4.4 RC1 I get mad battery drain.

As soon as I flash eXcaliBur the battery drains in like 2 hours with hardly any use. A reflash of the ROM fixes it as it restores the PA kernel
[One (M8) Android Development] xboxfanj:
Try stock frequencies.
[One (M8) Android Development] GohanBurner:
I set my frequencies at 300mhz min and 1.037mhz max. I use Faux Control and I watch the frequencies spike every few seconds to 1.498mhz. Why is this? Is it just because of AOSP? It's happening on every AOSP kernel I have tried. When I go back to a Sense ROM it'll hold my settings stable.
[One (M8) Android Development] xboxfanj:
Never seen this.
[One (M8) Android Development] CPA Poke:
The only thing I can think of that's causing the new black-screen issues on newer builds is this commit.

Looks like CM is at work updating their display drivers again.
[One (M8) Android Development] jcrompton:
I've been testing a Note 4 (locked down right - no root and I'm sure no hope of unlocked bootloader) so please excuse me if I've missed something.

I get black screen issue if I flash epsilon on Slim 8.9. I read the posts re flashing an RUU. I already have the later boatloader because of upgrading to Sense 4.4.4. Am I missing something? Also does flashing the RUU mentioned wipe my internal SD Card ... that would stink!

[MENTION=5686358]_moelle[/MENTION] when you flashed the GPE RUU doesn't that change your partition to GPE making it difficult to go back?
[One (M8) Android Development] _moelle:
ya it does! but i dont care about sense...not using it AT ALL! So just for me, its no problem. but ya, you should consider this before doing the RUU.
[One (M8) Android Development] xboxfanj:
At the very least, YouTube definitely works. Netflix too, so what issues are you guys having with videos?
[One (M8) Android Development] _moelle:
It works on vanir. on vanir everything runs fine, but on pacman, spiritrom, sinlessAOSP, AICP etc. (ya, did a big testing day this sunday^^) there is no video playback at all. youtube and every kind of other player are just giving a blackscreen. Soundoutput works just only for the first second.
[One (M8) Android Development] bacon612:
Yes. I can confirm the same issues but on cm11
[One (M8) Android Development] jcrompton:
I know I'm probably asking inn the wrong place but is it really worth it ..... wiping my sdcard is a big pain
[One (M8) Android Development] dandan2980:
I would say yes just back up your data to external sd if you have one or pc.
[One (M8) Android Development] jcrompton:
Which RUU did you use ? Are you on AT&T ?
[One (M8) Android Development] crookedview:
I'm also having video playback issues on CM11 with the new epsilon kernel. Youtube won't work, Phone will reboot if I try watching a twitch stream, files stored on a network share won't play, etc.
[One (M8) Android Development] dandan2980:
I'm on Sprint so I used HK 2.16 Ruu. Right before I received the 4.4.4 update. Not sure which you need maybe someone else could point you to the right direction.
[One (M8) Android Development] xboxfanj:
I figured it out.
[One (M8) Android Development] xboxfanj:
OP updated with the video fix included. Let me know what your favorite governors and IO schedulers are and I can maybe make them default.
[One (M8) Android Development] dandan2980:
Nice I like the Slim and interactive govs and row and deadline scheduler which are already there but wheatley and lionheart govs would be a nice addition
[One (M8) Android Development] dickenam:
Nice. What kernel is in the OP? It just says excalibur-date.
[One (M8) Android Development] xboxfanj:
Epsilon with CM updates.
[One (M8) Android Development] llsantiago:
Nice, no problems on PA, will you add overclocking? Thanks [MENTION=4003363]xboxfanj[/MENTION]
[One (M8) Android Development] jcrompton:
AT&T

I guess I'm willing to do the RUU flash to get beyond the black screen issue (I'm on Vanir latest) but I'm on AT&T and I'm not sure which one to flash -- I have updated to the latest firmware for the Sense 4.4.4 ROM installs -- do I need to go beyond that ?

Thanks!!
[One (M8) Android Development] crookedview:
Now with the kernel in OP and the 11/2 CM nightly I get the black screen problem. Reinstall 11/2 without epsilon and all is well.
[One (M8) Android Development] kickassdave:
Is it now working for those that had black screen before without all that RUU upgrading?
[One (M8) Android Development] dickenam:
Yup same on PA b5.

Never had the black screen issue until the 110214 zip in the OP. Was able to run NV9 thru epsilon with no issues, color me confused. Rolled back to epsilon, back to normal.
[One (M8) Android Development] kickassdave:
OK no. Still black screen on Bliss ROM.

I am S-ON, GSM device.

Older bootloader I think. Waiting for Android L rather than doing a full RUU just to get a kernel to work!
[One (M8) Android Development] dandan2980:
Well doing a Ruu period is not such a bad idea every once in a while, cleans all the garbage up from flashing but suit yourself.
[One (M8) Android Development] jcrompton:
Which RUU would you recommend for a GSM AT&T guy? It's really confusing which will work, which won't, and which might mess up my phone. I saw [MENTION=5686358]_moelle[/MENTION] flashing a GPE RUU but I had questions about that since its a kinda older RUU.
[One (M8) Android Development] dandan2980:
I wish I could give you advice on that but my carrier is Sprint and I am not familiar with the RUU's for GSM don't wanna lead you in a bad direction. Don't you guys have a dedicated Ruu thread? I'm sure someone can give you further assistance.
[One (M8) Android Development] TarekElsakka:
I assumed this would work with TeamEOS's AOSP ROM but apparently it doesn't, it just gives me a black screen and does not boot in.
[One (M8) Android Development] kickassdave:
Was it sensible to update the OP with a kernel that will result in a black screen for lots of users?
[One (M8) Android Development] bacon612:
I'll try it this afternoon and post back. I'm on a vzw m8 on latest firmware. I think what would be most helpful to users and the op is that they would state what version of the m8 they have and its respective firmware.
[One (M8) Android Development] _moelle:
as i mentioned before, there seems to be no RUU(sense) out there for the gsm. - I dunno why you guys over the big sea got lots of different RUU and here for the european people, there are no RUU´s available at all. - [MENTION=230362]jcrompton[/MENTION]: I dunno about AT&T, I´m from Germany so I would need to have at least a European RUU, but I can´t find even a single one. - What RUU´s you got to choose? ....The fact that I only be able to take the GPE RUU (which is the only one available for my device) doesnt let any space to choose ....but it worked for me and i dont care about sense, ...WIN!^^
[One (M8) Android Development] David 617:
The op thought that the balckscreen issue was fixed. See a couple posts back.
[One (M8) Android Development] TarekElsakka:
I also tried it on CM11, same result. I hope it can be fixed because it looks like a promising kernel.
[One (M8) Android Development] bacon612:
Ya. This newest build didn't work for me either. Black screen. Had to reflash an older cm11 build to boot again
[One (M8) Android Development] jsanta11:
Htc m8 s-off running pa beta 5 , after flashing the new kernel in op ..everything works good minus i can't connect to my wifi @ home ( I connected perfectly to optimum wifi only one i had to test aside from mines ) , I wiped , i restarted my modem and still the same problem , Once I flashed the franco kernel all was good again ... any ideas on what i can do ..

Thanks in advance
[One (M8) Android Development] bacon612:
Ya I had something similar happen. I had to flash a few different cm11 night lies till my WiFi came back. Even then it erased my saved WiFi profiles.
[One (M8) Android Development] krazie1:
I was having similar issues with black screen before we got our 4.4.4 update with new firmware on vzw. Now most of the new kernels from here I've tried since Oct 25 and up have worked fine. I'm currently using the Excalibur 11/2 build with crdroid and all is well.
[One (M8) Android Development] DonKilluminati23:
On newest carbon nightly it boots but videos (YouTube, tv portal) do not play. Also, using the flashlight for more than a minute or two caused reboots occasionally.
[One (M8) Android Development] Ikarisan:
Hi!

I am using CM11 nightlys on my M8 and I recently installed your kernel. Is it possible to enable tap2wake? I have installed the donated version of trickster mod but I cannot find any option to enable it. :(
[One (M8) Android Development] krazie1:
Anyone have a recommended setup for battery enhancements? What's a good governor, I/O scheduler and hotplug?
[One (M8) Android Development] Shamestick:
I've had good life on both interactive and slim governors, I don't have any screenies but I was always on point for 6+ hours SOT with 2-3 hours of music as well, outside of that my phone usage is texting and web surfing mostly, some games if I have a chance between classes. Hotplug I always kept with mako (I don't even know if you can enable MPD only on these, haven't tried). And as far as I/O schedulers go, the only time I've noticed a difference was when I switched from noop to row (while running slim governor) and it got much smoother. I later found out that noop is really a battery saving i/o so that made sense. I know dandan likes deadline governor (especially while running interactive) and I have used it with success as well.

However, this can only be a starting point since everyone's device/usage are different. Start with these and play aroaund and you'll find the prime set up soon enough!

Edit: and I don't know what you mean by battery enhancements exactly, because these settingsa re what i used for the stated battery life without sacrificing performance
[One (M8) Android Development] krazie1:
Thanks I meant what was the best setup for trying to save battery, enhancement just sounded fancy. Using slim governor now will mess with io scheduler. This is what I have checked for hotplug.
[One (M8) Android Development] Shamestick:
I mean if you want the suck every possible % out of your battery and take a performance hit then you could UC as well, and use conservative governor, don't remember if Excalibur has it. I used to use a script by dandan to edit the hot plug settings if you wanted to play with that (it gives more options than what's shown in kernel rweaker)
[One (M8) Android Development] CPA Poke:
Hopefully [MENTION=4003363]xboxfanj[/MENTION] doesn't mind me doing this, but for those of you trying to flash this on LiquidSmooth (or any of the other recent builds of ROMs that are causing issues with this kernel), go ahead and try out this flashable zip of the kernel, which I compiled within the LS ROM source tree in an effort to solve the black-screen-on-boot issues.

I'm on Liquid (of course), and the kernel is working great so far. No black screen issues, video works fine, etc.

The kernel was compiled using the most up-to-date source from [MENTION=4003363]xboxfanj[/MENTION]'s source here...the ONLY change I made in the source was to include a little special sauce: kexec hardboot compatibility (i.e. compatible with MultiRom, if you so choose). I have tested this as well and it's working fine.

It's worth a shot to try this on the other ROMs that are causing issues, as well - but I haven't tried it with any of them so I can't make any promises. For comparability purposes, I am on AT&T and RUU'ed my phone to GPE 4.4.2 firmware a few months ago - but haven't done anything else like that since.

Edit: Screenshot
[One (M8) Android Development] _moelle:
just did noticed that SUPER CID (111111) gives me the blackscreen again. - after changing back to googl001 (on gpe) , everything works fine again. - dunno if this is a genereally causing issue or just depend on my gpe RUU.
[One (M8) Android Development] _moelle:
poke i love you! this kernel was allready near to perfect but with included hexec multi support its just the non plus ultra for my personal use. i m a aosp/cm-only guy and be like a flash-a-holic installing many different roms and new builds. as i just use this kernel on every rom i test, its really really helpfull to finally dont have to swap the roms i test to primary anymore. wished to have multi support on xboxfanj's images for a long time. - so i really appreciate your step to make it happen. running awesome btw....just tested pacman and blissstalk .
[One (M8) Android Development] CPA Poke:
Good! Just curious, were you having issues (apart from not being able to use MultiRom) beforehand?
[One (M8) Android Development] Shamestick:
[MENTION=4913579]CPA Poke[/MENTION].. I am on liquid and the kernel you posted is working just swimmingly (although I was not having any issues beforehand either) and could you possibly PM me that wallpaper? I run klearkat theme when I can so I switch it around frequently
[One (M8) Android Development] jcrompton:
I recognize that there are a million variables:

I am on an AT&T variant phone that has TWRP installed with MultiRom. I am supercid 1111111.

I tried to install the latest LS Nightly withe new kernel and sure enough still got a black screen and would not boot. I could try to install as a primary ROM but don't want to go through time and trouble unless I can be of help in solving this issue. Let me know if you want me to try something differently
[One (M8) Android Development] CPA Poke:
Haha I'm actually not sure where it came from, it just kinda popped up in my wallpaper listing under "Google Now - KitKat". Maybe it comes with the Google Now app? I'm not sure. Here's where I found it:

Then this one:

Edit: ok just kidding, it's this Nova theme: https://play.google.com/store/apps/details?id=com.sonny.lpi.googlenow
[One (M8) Android Development] mopperx2:
I tried this on a verizon m8 with pac rom and kept getting fcs. Could not get into phone to test. Had to revert to a nandroid backup. I
[One (M8) Android Development] CPA Poke:
I doubt that the Rom slot has anything to do with it, but if you did want to make sure, it's a really easy process - you can do a Nandroid backup of whatever your primary rom is, and then add a secondary ROM using the "Add from Nandroid backup" option. Then your primary ROM is preserved, it's just in a different slot.
[One (M8) Android Development] jcrompton:
Ok, so since my last post I moved LS to primary and reinstalled with stock kernel ..... Boots fine. Then installed the modified Excalibur zip ..... Black screen. So the slot is not the issue. (@_Moelle, Is there a way to change CID without a PC (i don't have right now) to see if that helps or changes anything?

Any other ideas or is there anything else you want me to try?
[One (M8) Android Development] TarekElsakka:
I tried that kernel on CM11 as secondary and I got no black screen so I thought it worked but then in the ROM itself I keep getting a com.android.phone FC which won't go away so I am going to have to reinstall. With the kernel in the OP, I always got a black screen, but with your fix it booted but gave a phone FC. I tried taking a screen shot but it says "couldn't capture screenshot". Would you like a log? And if so, how do I retrieve one? Thanks.
[One (M8) Android Development] dandan2980:
Just got back on Aosp from sense the OP says last update is November 4 but the kernel is dated November 2 when I download it is this the correct kernel

---------- Post added at 11:15 PM ---------- Previous post was at 11:08 PM ----------

Well just flashed and everything is good no black screen.
[One (M8) Android Development] xboxfanj:
Updated it to show that and also when the kernel was put into the OP.
[One (M8) Android Development] dandan2980:
OK good I'm on the right one then running great so far this kernel is a a must have
[One (M8) Android Development] direwolf1:
Got black screen

I've loved this kernel and tried a lot of the various versions. Just coming back to it now, and I've tried to follow the discussion on this forum.

I installed the kernel on the following setup:

- AT&T Firmware 2.23.502.3

- SlimROM 8.10 weekly

Got black screen. Rebooted and dirty flashed SlimROM; got my phone back.

Is it fair to say at this point that the new version of the kernel doesn't work with the 2.23.502.3 firmware?
[One (M8) Android Development] krazie1:
I would say so, I was on the 4.4.3 firmware for my vzw variant and kept getting black screen on the kernels. Ever since updating to the 4.4.4 firmware all these kernels flash with no black screen.
[One (M8) Android Development] Shamestick:
Did you have signal/data when you booted LS? I answered a little prematurely to CPA poke as I was not on the new milestone build yet, and each time I've tried to flash it I have no data/signal
[One (M8) Android Development] dandan2980:
Well I am on Slim weekly 8.10 and I am now getting the blacked out screen on video play back. I can here the voices can't see it though. Is probably changes in the rom cause slim 8.9 and this kernel worked

---------- Post added at 08:59 AM ---------- Previous post was at 08:43 AM ----------

Also went back to Elipson and same Black screen on video but think Elipson is nicer cause I like the Slim gov
[One (M8) Android Development] jcrompton:
Can you clarify "updating to the 4.4.4 firmware". I have the latest 4.4.4 firmware but still get the black screen issue. I've seen some posts re flashing RUU etc. So it may be more than just a firmware upgrade ???
[One (M8) Android Development] Superm@π:
What are the best settings on the newest kernel using trickster mod to maximize battery? Thanks in advance!
[One (M8) Android Development] kickassdave:
I found I was capable of undervolting all frequencies by 65mV minimum with 300MHz happily sitting at 700mV and 2265MHz sitting at 960mV so you could give that a go for starters. A safe undervolt is -50mV on all frequencies if you are less adventurous.

You could use 268MHz minimum as well and undervolt to 690mV.

You could limit the CPU to a max of 1728MHz without really noticing a performance impact. The voltage required jumps significantly going to any frequency above 1574MHz so limiting to that frequency might save even more juice.

Reducing the hispeed_freq value by one step as well as increasing the go_hispeed_load value from 90 to 95 should also provide some good battery savings.

Beyond that, just have a go at experimenting with those figures till you find a nice balance ;)
[One (M8) Android Development] _moelle:
i recommend to leave it as it is stock settings are chosen by OP and it gives a blast of performance with also fantastic battery life.
[One (M8) Android Development] nickespi:
I'm a t-mobile user, update to the current firmware ECT. what i don't get not only this kernel, but EOS and Vanir will not flash for the life of me! ANNOYING LOL. why do i need to be excluded?? Argh??? Anyone with the same issues or fixes?? Suggestions??
[One (M8) Android Development] v01rider:
whats the trickster mod?

also, in op, i followed the link to download. it still reflects uploaded on 11-2. i downloaded anyway and reflashed, still black screen.
[One (M8) Android Development] jcrompton:
My Bootloader screen shows:

CID-11111111

HBOOT- 3.19.0.0000

RADIO-1.21.21331147A1.19.2G

OpenDSP-v46.2.2-00564-M8974_F0.0811

OS-3.28.401.7

eMMC-boot 2048MB

Oct 10 2014

This is one of the latest frimwares -- updated to run Sense 4.4.4

Do I need to do something else? Is there something that running one of the RUU does beyond updating the firmware , like I did to install/run Sense 4.4.4.?
[One (M8) Android Development] Superm@π:
Trickster mod is an app in the playstore to control kernel settings.
[One (M8) Android Development] Freak07:
Yes that sounds good this is approximately what I've been doing!

But depending on your pvs you might be able to go much lower, especially on the lower frequencies :)
[One (M8) Android Development] Superm@π:
You thinking smartmax or interactive for battery life?
[One (M8) Android Development] TarekElsakka:
So as I posted yesterday it gives me a black screen on TeamEOS and it gives me a "com.android.phone" FC on CynanogenMod 11. I have the latest firmware 3.28 installed. Can someone tell me which AOSP ROM it actually works perfectly on without any video problems, black screen, or FCs? I'd really like to use this kernel for a better battery life. Thank you.
[One (M8) Android Development] Superm@π:
I'm running latest kernel on the latest bliss. No problemo's.
[One (M8) Android Development] jcrompton:
Can someone that is successfully using this kernel please post the Bootloader info on their phone? This is very confusing ....
[One (M8) Android Development] Superm@π:
My CID is vzw__001, hboot is the same as yours, but my radio is 1.09----something
[One (M8) Android Development] jcrompton:
What does OS say?
[One (M8) Android Development] Superm@π:
3.28.605.4
[One (M8) Android Development] v01rider:
thanks. ive been using no frills forever now. i guess this is the latest app. i will give it a try!
[One (M8) Android Development] nickespi:
:

same exact situation my infO boot;oader ect. Is the same too
[One (M8) Android Development] kickassdave:
Make those changes on the Interactive governor. That's the one we had all been spending ages trying to perfect.

Well Xbonfanj made all the important changes and we all spent ages trying to tweak it to perfection :P
[One (M8) Android Development] SeVIIn:
So is it safe to say that Super CID = black screen?
[One (M8) Android Development] bacon612:
I got the black screen on the kernel posted in the op. Running cm11 nightly 11/5
[One (M8) Android Development] Superm@π:
Did everything you said except I undervolted by -75 instead. You think that is a dumb move?
[One (M8) Android Development] kickassdave:
Not dumb at all. It might work perfectly fine for you. If you get any random freezes where the phone just stops and resets itself that's a tell tale sign you've went too low. So just bump them all up by say 5mV and try again... And so on till you find the sweet spot!
[One (M8) Android Development] Superm@π:
10-4!
[One (M8) Android Development] jcrompton:
So it appears that CID doesn't really effect things???

This is really strange. I think I may just give up ...
[One (M8) Android Development] TarekElsakka:
I give up. I've tried almost everything. I installed Bliss several times with OP kernel and modified kernel with kexec with different results - with the OP kernel, I got a black screen and my internal storage was wiped, and with the modified kernel it booted in but there was no network. I'm going to attempt one last thing, which is change from Super CID to my original HTC__J15 CID and see if that fixes the black screen.
[One (M8) Android Development] tjeeeeee:
Until I can ruu I've just been running nv9 since all others give me issues as well
[One (M8) Android Development] _moelle:
almost everything ..except of RUU'ING...and thats actual the step all users have had to go to get this black screen issue solved. ( or at least the step that works after failing on every other tryed method) ;)
[One (M8) Android Development] TarekElsakka:
And where can I find the appropriate RUU for my device? And by the way, do you mean I am supposed to RUU while I am on SuperCID or after changing it to HTC__J15?
[One (M8) Android Development] _moelle:
dunno where to find a ruu thats compatible with your device, but talking about CID, I would recommend to change back from super to stock before ruuing.
[One (M8) Android Development] jxcorex28:
Black screen on the latest kernel also black screen on CPA LS kernel
[One (M8) Android Development] Shamestick:
Are you running LS when you're trying CPAs version? I'm on the latest milestone with it and its running just dandy
[One (M8) Android Development] jcrompton:
Another stupid and off topic question

Since in AT&T I don't really want to do my stock RUU. If I flash the GPE RUU can I install one of the Sense 4.4.4 roms as secondary .... Or Does this RUU preclude me from any Sense ROM no matter how installed?
[One (M8) Android Development] jxcorex28:
Yes sir I am

---------- Post added at 03:35 AM ---------- Previous post was at 03:34 AM ----------

I'm sorry, no I was using bliss or DU...I can't remember which one