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[ROM][GEN2]CyanogenMod 7 (Android 2.3.7)


Guest Test Zeppelin

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A good app for Battery calibration and ROM testing (only @ 100 cpu loads though )

https://market.andro...b.JuiceOffender

- Battery Brand Testing

- Full Power Cycle Charging

- Calibration Testing

- Pranks on Your Friends :)

- Also Works as a Hand Warmer! - I bet our BLADE would act as a hand burner :P lol

https://lh4.ggpht.co...eZeqcvWb1b=h230

Edited by vNa5h
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Guest KonstaT

i agree with everything you're saying there, especially B, battery life problems are related to crappy apps and wakelocks or dying batteries, otherwise everyone would have them.

UV won't even kick in when idle or when maxing out the cpu gaming. i'd be interested to see what phone functions are done at the 200-400Mhz frequencies, probably phonecalls and that's about it.

i've nothing against UV if it was implemented properly and proven to be worth the potential stability issues, but as it is its a bit "meh"

I also agree for most parts, but I still can't understand how you claim that idle time isn't undervolted? 480mhz and all frequencies below that are undervolted - also 122mhz (=122mhz-480mhz, commit). Are you saying that CPU somehow magically stops completely and doesn't use power at all when phone enters deep sleep?

Idle time, phone calls, listening to music, tracking exercise using GPS, etc. would be good examples of normal screen off activities happening in those freqs. I have also noticed that when screen is on, cpu has plenty of time to drop to undervolted 480mhz (or to 403mhz now that it is enabled) under light use e.g. just simply reading a web page. You can install CPU Spy or similar app to get statistics about the time CPU spends in each frequency.

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Deep sleep is CPU in suspend. It doesn't run then at all (pretty much 0MHz ;) ). You really should know that from your PC as well. Of course the CPU still needs some power in sleep but it's FAR less than at 122MHz. Search the forums - in (mostly) deep sleep (= normal phone idle) and with GSM off (= flight mode) the battery lasts for almost a month AFAIR.

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Guest KonstaT

I stand corrected. :)

Benefits from undervolting would be then more depending on how you use your phone. I'm not saying that it will cure anyone's battery related issues or make huge difference in battery life in general (we're talking about few percentages anyway). Since it really doesn't cause any stability issues, benefits from undervolting are still worth having.

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Guest targetbsp

Since it really doesn't cause any stability issues, benefits from undervolting are still worth having.

The thing is though it does cause issues for some and the difference is so slight as to be almost insignificant

Here's the results from the most recent test: http://android.modaco.com/topic/335328-romgen2cyanogenmod-7-android-237/page__st__12220__p__1892203#entry1892203

This was the third test I ran and the one most likely to benefit the UV kernel. The previous two tests showed no benefit to having a UV kernel. In the linked test only the CPU was using power, nothing else, the CPU was locked at a frequency where it was undervolted and run flat out constantly over 14 hours.

After 14 hours, the difference between UV and normal voltage was 5% of the battery. This is, as you say a few percent difference. But the thing to consider is that the phone was going to last close to 24 hours of flat out CPU usage. Meaning the CPU is using fairly insignificant amounts of power compared to any other hardware in the phone!

We've already agreed in the above few posts that it saves nothing whilst the phone sleeps (I proved that in an earlier test too :D ) and it can''t save anything whilst the CPU is under heavy use.

So we're down to the only condition when it saves power is light usage and the only time the saving will be noticeable is where the rest of the hardware is doing nothing. MP3 playing is pretty much the only thing that springs to mind! Or people who have crap apps keeping their phone awake. :D During a call, using the GPS, anything with the screen on is going to have the rest of the phone using so much more power than the CPU that a slight power saving by the CPU will be insignificant.

We know that it causes some people stability issues. We also now know that it will only benefit certain selected uses and even then, not much. With that in mind... surely it should very much be an optional feature? Rom's that have it as standard should have an optional normal voltage kernel surely?

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Guest targetbsp

I'm not claiming for a minute that my tests are proof that everyone should follow as gospel. But they were carried out over a period of two weeks in as controlled conditions as I could manage (to the point where some were restarted after a few days if... say I received a text) I'm more than happy for someone to counter them but I've seen no testing to that effect. Only anecdotal claims. And I've seen as many of those, if not more, saying it doesn't bring a benefit.

To be perfectly honest... I'm thinking placebo effect. Or maybe people have just upgraded to these new UV kernel roms, excited by the idea of better battery life, but they were in fact coming from older roms that actually had battery issues?

Edited by targetbsp
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what targetbsp said. i won't use a rom that risks instability for so little benefit. i trust sej's won't include UV.

the battery life is excellent with CM anyway now, and if it isn't UV won't help you!

Edited by Smiff2
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Guest Maxsas360

I'm not claiming for a minute that my tests are proof that everyone should follow as gospel. But they were carried out over a period of two weeks in as controlled conditions as I could manage (to the point where some were restarted after a few days if... say I received a text) I'm more than happy for someone to counter them but I've seen no testing to that effect. Only anecdotal claims. And I've seen as many of those, if not more, saying it doesn't bring a benefit.

To be perfectly honest... I'm thinking placebo effect. Or maybe people have just upgraded to these new UV kernel roms, excited by the idea of better battery life, but they were in fact coming from older roms that actually had battery issues?

Actually I thought my battery is better, but I realized I still charge it every day :D

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I stand corrected. :)

Benefits from undervolting would be then more depending on how you use your phone. I'm not saying that it will cure anyone's battery related issues or make huge difference in battery life in general (we're talking about few percentages anyway). Since it really doesn't cause any stability issues, benefits from undervolting are still worth having.

The thing is though it does cause issues for some and the difference is so slight as to be almost insignificant

Here's the results from the most recent test: http://android.modac...03#entry1892203

This was the third test I ran and the one most likely to benefit the UV kernel. The previous two tests showed no benefit to having a UV kernel. In the linked test only the CPU was using power, nothing else, the CPU was locked at a frequency where it was undervolted and run flat out constantly over 14 hours.

After 14 hours, the difference between UV and normal voltage was 5% of the battery. This is, as you say a few percent difference. But the thing to consider is that the phone was going to last close to 24 hours of flat out CPU usage. Meaning the CPU is using fairly insignificant amounts of power compared to any other hardware in the phone!

We've already agreed in the above few posts that it saves nothing whilst the phone sleeps (I proved that in an earlier test too :D ) and it can''t save anything whilst the CPU is under heavy use.

So we're down to the only condition when it saves power is light usage and the only time the saving will be noticeable is where the rest of the hardware is doing nothing. MP3 playing is pretty much the only thing that springs to mind! Or people who have crap apps keeping their phone awake. :D During a call, using the GPS, anything with the screen on is going to have the rest of the phone using so much more power than the CPU that a slight power saving by the CPU will be insignificant.

We know that it causes some people stability issues. We also now know that it will only benefit certain selected uses and even then, not much. With that in mind... surely it should very much be an optional feature? Rom's that have it as standard should have an optional normal voltage kernel surely?

what targetbsp said. i won't use a rom that risks instability for so little benefit. i trust sej's won't include UV.

the battery life is excellent with CM anyway now, and if it isn't UV won't help you!

nuff' said on the UV thingy

So that pretty much sums it up....

Undervolting is a sham

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Guest Davidoff59

The best battery life I have seen was using the lewa rom. It had the security issues but battery life was better than any rom I have tested so far.

I could get approximately 2-3 more hours battery life while on the internet.

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Guest nitsy01

Hi guys..I had installed BurgerZ 3 Feb build and i was still facing the battery drain issue i faced on Sej's Rom earlier. The phone was not at all going in deep sleep. It used to drain out within a day. Android system was using most of the battery. But after a couple of days use it started going into deep sleep and a marked improvement in the battery. The only thing different i have done is uninstalled the market updates(and reverted back to the old version) and uninstalled market updater through titanium. All this after taking a backup through titanium though. I may be talking nonsense here...but thought maybe some could try it out. I have now used the phone on a single charge for 3 days 18hrs, voice calls done for 1hr and 28min(iam not that much of a talker on the phone)..few texts too...no wifi or surfing done and no music too. the cell has been on standby since 2days 19h. and yes in offline mode during the night for around 6hrs. Anyways no going back to any other roms for some time nowbiggrin.gif as i might loose out on the deep sleep thing again!

Edited by nitsy01
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Guest mitchde

Yep, if the phone never reaches deep sleep it is an big problem for battery life, doesnt matter UV kernel or not!

I use cpu spy to check that. It may NOT be a problem of kernel/ROM it may often a problem ov some non rom content apps, which avoids the deep sleep.

I am happy with newest burgerZ 09.feb (+ kernel fiy 10.feb).

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Guest JimJam707

Doesn't really affect us as we have the kangs (good work guys!) but the Cm7.2 RC1 Changelog has been posted to gerrit.

  • New devices: Samsung Galaxy Ace, Mini, and Epic 4G (slider). LGE Optimus Black, 3D, Hub, Pro, Sol, and One. Motorola Atrix. Sony Ericsson Xperia Live, Pro, and Active. Huawei U8150
  • Common: ICS telephony fix backports - Spencer Oliver
  • Common: ICS Transition effects backport - Russ Underhill
  • Common: ICS Rotation effects backport - Tanguy Pruvot
  • Common: Lockscreen updates and new styles - Andrew Sutherland, Danny Baumann, Danesh M, Sven Dawitz
  • Common: Fix color banding in Gallery while displaying 32bpp images - Sang Tae Park
  • Common: T9 predictive Phone dialer - Danesh M, Pawit Pornkitprasan
  • Common: ADB over network
  • Common: Updated translations - (everyone)
  • Common: Media player and recorder fixes for a number of corner cases - CAF, Danny Baumann
  • Common: Profile resets - Ladios Jonquil
  • Common: Assorted Wifi fixes
  • Common: Control haptic in quiet hours - Danesh M
  • Common: Bluetooth MAP support - Jonathan Bensen
  • Common: Support for Bluetooth GPS dongles - Cuong Bui
  • Common: Better support for mouse and usb keyboards - Emilio Lopez, Tanguy Pruvot
  • Common: Fix timezone detection in Hawaii - Warren Togami
  • Common: Allow photo storage selection when possible - Greg Kochaniak
  • Common: Improved Calendar reminder options - Danny Baumann
  • Common: Improved AVRCP 1.3 compatibility
  • Common: Improved external keyboard and mouse behaviour on some corner cases - Tanguy Pruvot
  • Common: Status bar battery icon configuration - Simon Davie
  • OMAP Common: Support for recent OMAP3/OMAP4 devices - omapzoom
  • p990: Add FM Radio support
  • p990/p999: fix background calls, fix HDMI output in 1080p
  • zeppelin, morrison, motus: Fixed camera zooming issues
  • Samsung Galaxy S devices: Add tv-out
  • Samsung Galaxy S devices: Device specific settings section
  • Samsung Galaxy S GSM devices: Fix emergency dialing
  • Several devices: Fix device identification on Android Market: crespo, jordan, blade, v9

Source: Android Police

Edited by JimJam707
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Guest JudasLucifer

I just found one of the most annoying/odd bugs ever :P (for me) (okay that was an exaggeration)

So when I try and use the lovely change lockscreen background option:

screenshot-1328964916315.png

Hurrah! It works fine with this jellyfish. My lockscreen will look beautiful.

However, when you try and change it to some pictures:

screenshot-1328964876341.png

It selects a square region (with a locked aspect ratio), and so when you look at your locksreen, ITS ALL SQUISHY.

This happens when you try and use a picture with a face in the lockscreen background, the square automatically sets itself around the face (as you can see)

I didn't even know that the Gallery had face detection.

But there you go, sometimes, you can't have a face in your lockscreen background.

I'm using the Jan 26th build (or one of them :P)

Edited by JudasLucifer
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Guest sej7278

I just found one of the most annoying/odd bugs ever :P (for me) (okay that was an exaggeration)

So when I try and use the lovely change lockscreen background option:

Hurrah! It works fine with this jellyfish. My lockscreen will look beautiful.

However, when you try and change it to some pictures:

It selects a square region (with a locked aspect ratio), and so when you look at your locksreen, ITS ALL SQUISHY.

This happens when you try and use a picture with a face in the lockscreen background, the square automatically sets itself around the face (as you can see)

I didn't even know that the Gallery had face detection.

But there you go, sometimes, you can't have a face in your lockscreen background.

that's really bizarre. its either because the face picture is square/landscape and the jellyfish is rectangular/portrait, or it truly is face detection!

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Guest JudasLucifer

that's really bizarre. its either because the face picture is square/landscape and the jellyfish is rectangular/portrait, or it truly is face detection!

I've tried it with portrait pictures featuring faces in varying places, and the box still snaps square around the face. It's really odd, having face detection when there seems no obvious way to utilize it :)

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