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View Poll Results: Which devs kernels work the best for you
jdlfg 4 3.81%
ChevyNo1 51 48.57%
P3Droid 15 14.29%
Jake 0 0%
Bekit 1 0.95%
TopQuark 1 0.95%
Slayher 33 31.43%
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Old June 11th, 2010, 12:20 PM   #1 (permalink)
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Default Froyo Kernels

I searched and didn't find a separate thread dedicated to all the kernels available for Froyo, so I'm posting what Ive found in doing my research.

There are the jdflg kernels that redflea told us about here:
http://androidforums.com/all-things-root-droid/94673-new-froyo-kernels-released-jdlfg.html
Also, jdflg kernels made specifically for CyanogenMod: jdlfg kernels v.32.2.4 kernels. - CyanogenMod Forum - Page 19
And jdflg kernels with CPU Temp:
http://androidforums.com/all-things-root-droid/139543-new-jdlfg-kernels-out-w-cpu-temps.html

For ChevyNo1 (ULV/LV/MV) with CPU Temp:
[8-1-2010] New Froyo Kernels - CPU Temp Monitoring is Back! - Droid Forum - Verizon Droid & the Motorola Droid Forum

For P3Droid (use those specifically for Froyo):
P3Droid Kernels
These P3Droid kernels for Sapphire have been reported as working on other ROMs (I can confirm this), as well:
P3Droid Kernels
And these P3Droid for Liquid Frozen Yogurt have been reported as working on other ROMs (I also can confirm this), too:
Recommended P3Droid Kernels
And now, for kernels that report CPU temp here are these from P3Droid:
P3Droid Kernels

Jake's Froyo Kernels:
Jake's Froyo Kernels - Jake and Boostdscoob - AllDroid Public Board - Jake's Froyo Kernels - Jake and Boostdscoob - AllDroid Public Board - Forum
Jake also has new kernels with working WiFi, in the OP here: Team Awesome does it again - Jake and Boostdscoob - AllDroid Public Board - Team Awesome does it again - Jake and Boostdscoob - AllDroid Public Board - AllDroid.org > Home (thanks endmao!)

A Bekit (test) kernel for Froyo has now been posted. From his Twitter (2:50 PM Jun 25th):
"For those who have asked, here is a test .32 kernel for Froyo Droid builds - http://bit.ly/aoRUqR I will work on more features next week!"

Kernel choices up to 1.4Ghz by TopQuark that inssane told us about here:
http://androidforums.com/all-things-root-droid/117279-new-froyo-kernel-up-1-4ghz-other-speeds-topquark-based-off-p3.html

New kernels by Slayher (with "interactive governor"):
Froyo Kernels by slayher - CyanogenMod Forum

If you know of any others, post them in this thread and I'll add them to the OP.


INSTRUCTIONS: How to Flash a Kernel








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Old June 11th, 2010, 12:36 PM   #2 (permalink)
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Good thread!

I have only had success with the P3 Kernels ATT. I was up to test out the hype of the jdflg kernels...but all of them are a huge fail except for the 800MHz one. I'm running P3's 1.1GHz and don't see a reason to switch to anything else. Haven't tried Jake's or Chevy's yet...but it looks like they still don't have any 1.1GHz (my droid's sweet spot).

Someone give me a reason?
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Old June 11th, 2010, 12:41 PM   #3 (permalink)
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Yea I was running Jdflg's kernels awesome on my CM 5071, however his 2.2 kernels aren't running very well for me... He is working on them though...

Does anyone know if the cpu temp issue is worked out yet? I heard that P3 was aware of it and working on it but haven't heard any updates in a few days...
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Old June 11th, 2010, 12:42 PM   #4 (permalink)
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Actually, UBR, if you look at Chevy's Froyo kernel index, you'll see he DOES have 1.1Ghz, both in LV and ULV. Index of /froyokernels
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Old June 11th, 2010, 12:57 PM   #5 (permalink)
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I couldn't get Chevy's kernel to run on BB FRF57 v0.1
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Old June 11th, 2010, 12:58 PM   #6 (permalink)
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The kernel situation is going to get a lot better once the source is released. Right now they are all doing a hack and slash job of the kernel that came with froyo.

Of the Froyo kernels I have tried P3droid's are by far the best at this point.
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Old June 11th, 2010, 01:00 PM   #7 (permalink)
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Quote:
Originally Posted by GirLuvsDroid View Post
Actually, UBR, if you look at Chevy's Froyo kernel index, you'll see he DOES have 1.1Ghz, both in LV and ULV. Index of /froyokernels
Okay, thanks for the correction. Looks like the verbiage on his original posts just hasn't been updated.
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Old June 11th, 2010, 07:27 PM   #8 (permalink)
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I was just going to ask about this, but I decided to search first.

But, this thread brings up an interesting question: has anyone had any experience with the ULV kernels? Is there any significant advantage (heat, battery life, etc) from running ULV vs. LV?
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Old June 11th, 2010, 07:52 PM   #9 (permalink)
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I just loaded up the Chevy ULV kernel, but I've used it before in 2.1

The advantages of lower (and ultra low) voltages is that if your phone can still run at the desired frequency at the lower voltage, then it will produce less heat and the battery life will be longer.

So the aim is always to find the lowest possible voltage where you phone can still stably run at the frequency you want it to.
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Old June 11th, 2010, 08:22 PM   #10 (permalink)
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If I may ... I was and am still very leery about "Low Voltage" kernels. I have been over-clocking CPUs for more than 15 years, and the rule has always been "the higher the speed, the more voltage required". When did this change? I can't help but wonder what the long-term effect is going to be on these CPUs that are voltage-starved. (Not that I care too too much.)
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Old June 11th, 2010, 08:27 PM   #11 (permalink)
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I'm certain in LV kernels, the higher clockspeeds still have higher voltages. It's just that these OMAP3 chips are pretty mature, and so are their fabrication processes.

Just like lots of these new Core i7's can still run at their factory clocks, even though people reduce the voltage considerably.

While I would say the number of overclockers are extremely high, there are those who also undervolt

I think this is the Droid equivalent



And off topic, but I run my AMD Phenom II 940 BE every so slightly undervolted at 1.3V
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Old June 11th, 2010, 08:29 PM   #12 (permalink)
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Quote:
Originally Posted by messenger13 View Post
If I may ... I was and am still very leery about "Low Voltage" kernels. I have been over-clocking CPUs for more than 15 years, and the rule has always been "the higher the speed, the more voltage required". When did this change? I can't help but wonder what the long-term effect is going to be on these CPUs that are voltage-starved. (Not that I care too too much.)
I feel that there's a significant difference in the way these phones are overclocked vs. traditional CPU overclocking. Unfortunately I don't know enough to make a legitimately educated assessment, but at the very least I can't imagine that under-volting a CPU will cause any damage to it. Perhaps if you try to do too much with the phone, it will cause it to stall or reboot, because it doesn't have enough power.

I think my primary curiosity comes from the line of thought of: "If low voltage is better, and if there are so many LV kernels floating around out there, it can't be THAT hard to make an LV kernel. So why didn't Motorola make a low voltage kernel when releasing the phone, in order to increase battery life?"
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Old June 11th, 2010, 08:31 PM   #13 (permalink)
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Quote:
Originally Posted by ech0 View Post
I think my primary curiosity comes from the line of thought of: "If low voltage is better, and if there are so many LV kernels floating around out there, it can't be THAT hard to make an LV kernel. So why didn't Motorola make a low voltage kernel when releasing the phone, in order to increase battery life?"
There's too much variance in the fabrication process. Motorola has to pick a voltage that they will all run at, even though there are those great chips that can run at much lower voltages.

Just like in the CPU market, where chips are 'binned'. They are actually the same as others of their model, but can run at higher frequency or lower voltage. They are then renamed something different and sold for a higher price
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Old June 12th, 2010, 08:55 AM   #14 (permalink)
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the jdflg kernels are running good on mine. not much heat when OCed at 1.0ghz. battery life seems to be not so good though, gonna have to test it a bit more. P3 were giving me lots of heat problems at 1.0ghz. heats up real quick and goes to really high temps. battery life also seem to be not so good. i'll have to test out the other kernels too maybe.
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Old June 12th, 2010, 11:07 AM   #15 (permalink)
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Quote:
Originally Posted by Fabolous View Post
I just loaded up the Chevy ULV kernel, but I've used it before in 2.1

The advantages of lower (and ultra low) voltages is that if your phone can still run at the desired frequency at the lower voltage, then it will produce less heat and the battery life will be longer.

So the aim is always to find the lowest possible voltage where you phone can still stably run at the frequency you want it to.
how is that workin for ya?
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Old June 12th, 2010, 12:36 PM   #16 (permalink)
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Well, ironically, I ended up trying EVERY kernel in my OP. The problem for me is that my Droid hates LV kernels and all the Froyo kernels I've found are ULV or LV. Before now, there's only one LV kernel I was able to use on my Droid and that was the Bekit 1.0 LV from Pete's BB V1.1. I finally found the second and the one I'm running now: ChevyNo1's LV 1.1Ghz for Froyo. None of the other kernels even booted for me (well, Chevy's LV 1.2 booted the first time, but when I rebooted a little later, it wouldn't boot up again). Now that I've found the one kernel other than stock that will work, so far it seems to be performing well and staying cool.
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Old June 12th, 2010, 12:58 PM   #17 (permalink)
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This one gave me wifi back after installing Fabs Nexthemed BB release...

P3Droids 1GHz = "250/500/600/700/800/900/1000" on the list on his site that you link to above.

But it seems like it might be running a little hot, so I'm going to try a few others...I hope the kernel devs can continue to come up to speed quickly on Froyo kernel issues, and get us the same great results I had on 2.1...with jdflg's 1GHz kernel on CM 5.0.7 and 5.0.8 I ran fast and cool as a cucumber.
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Old June 12th, 2010, 04:43 PM   #18 (permalink)
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I never even heard of Jake's kernels until I first flashed Froyo, but I've got to say, best luck I've had yet. My Droid is running cool, and my battery life is better than it's ever been (though I'm sure that's more the ROM).

What really stood out to me was the SetCPU benchmarks. Even though every other kernel gave me great MFLOPS, the ms were still pretty average. But w/ Jake's kernels I'm getting the lowest shortbench I've ever even heard of. I got 129ms on 1GHz and 114ms on 1.2GHz!

Also, I had quite a bit of kernel trouble w/ Froyo. It's like nothing was stable. So give em a whirl. It's easy enough to flash a diff one.
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Old June 12th, 2010, 04:57 PM   #19 (permalink)
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Quote:
Originally Posted by YankeeDudeL View Post
I never even heard of Jake's kernels until I first flashed Froyo, but I've got to say, best luck I've had yet. My Droid is running cool, and my battery life is better than it's ever been (though I'm sure that's more the ROM).

What really stood out to me was the SetCPU benchmarks. Even though every other kernel gave me great MFLOPS, the ms were still pretty average. But w/ Jake's kernels I'm getting the lowest shortbench I've ever even heard of. I got 129ms on 1GHz and 114ms on 1.2GHz!

Also, I had quite a bit of kernel trouble w/ Froyo. It's like nothing was stable. So give em a whirl. It's easy enough to flash a diff one.
Nice writeup YankeeDude -- I wish they would work for me, but they wouldn't boot at all on my Droid.
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Old June 12th, 2010, 05:23 PM   #20 (permalink)
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Quote:
Originally Posted by YankeeDudeL View Post
I never even heard of Jake's kernels until I first flashed Froyo, but I've got to say, best luck I've had yet. My Droid is running cool, and my battery life is better than it's ever been (though I'm sure that's more the ROM).

What really stood out to me was the SetCPU benchmarks. Even though every other kernel gave me great MFLOPS, the ms were still pretty average. But w/ Jake's kernels I'm getting the lowest shortbench I've ever even heard of. I got 129ms on 1GHz and 114ms on 1.2GHz!

Also, I had quite a bit of kernel trouble w/ Froyo. It's like nothing was stable. So give em a whirl. It's easy enough to flash a diff one.
Wifi working as well?
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Old June 12th, 2010, 06:31 PM   #21 (permalink)
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Is there a web site that lists all the kernels (and hosts downloads) from the different makers? If not, would that be something worthwhile having, and would the creators of the kernels go for it? I'd be happy to whip something up if so, I just don't want to do all the work if no one would use it...

PS: might also list ROMs, unless those are available elsewhere...
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Old June 12th, 2010, 09:12 PM   #22 (permalink)
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i have been running chevy's ULV1000 kernel all day with no problem. it runs cool and quick. and so far battery life is amazing.
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Old June 12th, 2010, 09:20 PM   #23 (permalink)
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Default Re: Froyo Kernels

I had some random reboots with the ulv kernel, but having tons of success with the low voltage. The battery life has been superb as well.

Chevy has outdone himself once again.

Quote:
i have been running chevy's ULV1000 kernel all day with no problem. it runs cool and quick. and so far battery life is amazing.

Sent from my Droid using Tapatalk
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Old June 12th, 2010, 09:29 PM   #24 (permalink)
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Quote:
Originally Posted by Fabolous View Post
I had some random reboots with the ulv kernel, but having tons of success with the low voltage. The battery life has been superb as well.

Chevy has outdone himself once again.
I totally agree with this statement -- my battery life has been phenomenal on Chevy's 1.1Ghz LV, as well. Very impressed!
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Old June 12th, 2010, 09:30 PM   #25 (permalink)
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Quote:
Originally Posted by UBRocked View Post
Good thread!

I have only had success with the P3 Kernels ATT. I was up to test out the hype of the jdflg kernels...but all of them are a huge fail except for the 800MHz one. I'm running P3's 1.1GHz and don't see a reason to switch to anything else. Haven't tried Jake's or Chevy's yet...but it looks like they still don't have any 1.1GHz (my droid's sweet spot).

Someone give me a reason?
1.1Ghz WOW! I had mine up to 1Ghz last night and it rebooted itself. Right before it rebooted the temp was up to 146, so I figured the temp did it. I only had pandora and a live wallpaper running.
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Old June 12th, 2010, 09:55 PM   #26 (permalink)
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Quote:
Originally Posted by mrjerryk View Post
1.1Ghz WOW! I had mine up to 1Ghz last night and it rebooted itself. Right before it rebooted the temp was up to 146, so I figured the temp did it. I only had pandora and a live wallpaper running.
I've been running P3 1.2Ghz and while its very fast and stable for me, its been getting really hot really fast. After about 10 minutes of web browsing its burning hot. Even when charging it and not using it, it gets alarmingly hot.

I'm flashing the jdlfg 7x1100sv now, just because the link for the 1200lv seems to be down. Hoping for P3's performance with cooler temps.

Edit: The jdlfg 7x1100sv gave me random reboots and froze during the boot animation. I have since switched to the Chevy 7x1200 ulv it seems to be working great so far. Battery life seems ok and temps are staying low, but the same wifi issue does remain. If i forget the network, I can no longer connect to it. Otherwise, seems like a good kernel so far.
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Old June 12th, 2010, 09:56 PM   #27 (permalink)
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I totally agree with this statement -- my battery life has been phenomenal on Chevy's 1.1Ghz LV, as well. Very impressed!
Wireless working w/the Chevy kernels on BB/Fab ROM?
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Old June 12th, 2010, 10:05 PM   #28 (permalink)
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Wireless working w/the Chevy kernels on BB/Fab ROM?
Yes, on both. On BB without theme, WiFi connects to new networks and everything. On NexBeast v0.1, my WiFi works for remembered networks, but won't connect to new -- both on the Chevy kernel.
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Old June 12th, 2010, 10:29 PM   #29 (permalink)
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I've had chevy's ULV 1.25 kernal on my phone for about 9 hours. Right when I installed it, I ramped it upto 1250 max and 1250 min to run some bench marks. I never put it back to normal! It's been running at a full 1250 for over 9 hours and I'm at around 60% according to the battery % in the status bar!

What are the voltage differences between p3 and chevy?
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Old June 13th, 2010, 10:13 AM   #30 (permalink)
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Fab's got a fix for wireless that he's evidently going to post today.

In any case, wireless is already working for me on both P3Droid 1.0GHz 250 min and Chevy 1.0GHz LV kernel...getting somewhat better SetCPU short benchmarks on Chevy's (just under 200 as opposed to 215-225) Quadrant and Linpack scores are the same (15.5 Linpack, 1250 Quadrant).

Temps look like they might be a little cooler on Chevy's as well, but we really need CPU temp monitoring to be sure. Using Fab's themed Bugless Beast Froyo.
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Old June 13th, 2010, 04:13 PM   #31 (permalink)
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Nice writeup YankeeDude -- I wish they would work for me, but they wouldn't boot at all on my Droid.
Kernels..weird science.
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Old June 13th, 2010, 04:14 PM   #32 (permalink)
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Wifi working as well?
Negative, restarts immediately. Luckily I rarely use it. Gonna try Fab's patch. I've recently flashed back to his ROM. Experimenting, you know.
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Old June 13th, 2010, 04:31 PM   #33 (permalink)
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Negative, restarts immediately. Luckily I rarely use it. Gonna try Fab's patch. I've recently flashed back to his ROM. Experimenting, you know.
Good luck
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Old June 13th, 2010, 05:43 PM   #34 (permalink)
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Running BD's Foryo beta with Chevy's .250-1.0 LV kernel. Real smooth, real quick. Google earth doesn't freeze when I pan & tilt, etc.
What other benchmark testing do people use (besides pi calc, etc)?
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Old June 13th, 2010, 05:44 PM   #35 (permalink)
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Any of these kernels support wifi tether? I am currently using Chevy's ultra low voltage but can't get tether to work.
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Old June 13th, 2010, 06:13 PM   #36 (permalink)
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^seems access control doesn't work right in froyo. I turned access control off now all is good.
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Old June 13th, 2010, 07:29 PM   #37 (permalink)
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Running BD's Foryo beta with Chevy's .250-1.0 LV kernel. Real smooth, real quick. Google earth doesn't freeze when I pan & tilt, etc.
What other benchmark testing do people use (besides pi calc, etc)?
Quadrant, there is a thread of peoples scores.
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Old June 13th, 2010, 08:51 PM   #38 (permalink)
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Any of these kernels support wifi tether? I am currently using Chevy's ultra low voltage but can't get tether to work.
Chevy's LV 1GHz kernel works w/wireless tether for me....
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Old June 14th, 2010, 09:26 AM   #39 (permalink)
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Default Re: Froyo Kernels

Ok, I got a question, this is a noob question, but I figured I'd ask and save someone else the trouble...
If you flash a froyo kernal, and the new baseband, if you ever decide to go back to 2.1, will you keep the same kernal and/or baseband or will u have to change them as well after flashing said 2.1 rom?

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Old June 14th, 2010, 09:37 AM   #40 (permalink)
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Ok, I got a question, this is a noob question, but I figured I'd ask and save someone else the trouble...
If you flash a froyo kernal, and the new baseband, if you ever decide to go back to 2.1, will you keep the same kernal and/or baseband or will u have to change them as well after flashing said 2.1 rom?

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You can keep the baseband, because it is independent of the ROM (I actually updated my baseband to the latest while I was still running 2.1, without any problems). However, you will need to change your kernel to one that is compatible with 2.1.
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Old June 14th, 2010, 09:52 AM   #41 (permalink)
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Default Re: Froyo Kernels

Quote:
Quote:
Ok, I got a question, this is a noob question, but I figured I'd ask and save someone else the trouble...
If you flash a froyo kernal, and the new bas
You can keep the baseband, because it is independent of the ROM (I actually updated my baseband to the latest while I was still running 2.1, without any problems). However, you will need to change your kernel to one that is compatible with 2.1.
Which brings me to my next question, if you decide to go back to stock and for some reason had to return your Droid, wouldn't they know you messed with it by the updated baseband? Because just swapping roms does not change this..
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Old June 14th, 2010, 11:10 AM   #42 (permalink)
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Which brings me to my next question, if you decide to go back to stock and for some reason had to return your Droid, wouldn't they know you messed with it by the updated baseband? Because just swapping roms does not change this..
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flashing an sbf file does change your baseband though. I would always recommend an sbf flash before returning a phone to vzw. Its the best way to ensure they have no idea you rooted.
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Old June 14th, 2010, 12:24 PM   #43 (permalink)
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i have been running chevy's ULV1000 kernel all day with no problem. it runs cool and quick. and so far battery life is amazing.

Update: after using this kernel for a full day i can say my battery life is insanely good. if your phone can handle an ultra low voltage kernel i highly recomend this one. my phone runs cool and fast at 1000mhz and after taking it off the charger at 7:05am i still have 90% battery as of 1:22pm and that is with a few calls, several emails, some web browsing and the normal "i am bored let me look at my phone stuff"
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Old June 15th, 2010, 01:51 AM   #44 (permalink)
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I didn't read much below the OP, but two things.
Can this be stickied as many of us need resources like this coming from 2.1 to 2.2.

Also - anyone notice a difference in battery, performance, etc versus the P3?
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Old June 15th, 2010, 03:17 AM   #45 (permalink)
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P3Droid's 2.2 ghz kernel crashes my droid

I am using Fab's rom based off of the stock froyo kernel, not Pete's, so maybe that is why. I will wait until Pete releases his epicnesss and then decide if it is the kernel or the rom.
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Old June 15th, 2010, 03:19 AM   #46 (permalink)
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The phone reboots when using max cpu (playing flash). But when I turn down the max clock to 1.1 ghz, all is well.
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Old June 15th, 2010, 04:44 AM   #47 (permalink)
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I've had rebooting issues in the past with anything over 1GHz. At that time, there were few choices and it seemed either your phone could handle it or it couldn't. Now there are a lot more choices so I don't know if there's a 1.XX GHz kernel out there that'll work with my Droid & the ROM I'm running. But I've since found that 1 GHz is plenty for me. Earth is my most intense app, and it runs well. (I've had laptops with faster running processors and a lesser screen choke on Google Earth.)

My battery was draining pretty fast this weekend for having SetCPU all set up, but it's hard to tell because I'm obvioulsy playing with the phone much more since the new installation of the Froyo ROM. (BD's Froyo beta + Chevy's LV 1.0GHz kernel)
Last night I installed Chevy's ULV 1.0GHz kernel to try out for battery longevity. I'll treat the phone like a usual day is for me, which is checking mail in the background and playing with it during lunch hour. At some point I'll try to max out the CPU to see if it shuts down. I'll post my results here before trying Chevy's 1.1 ULV.
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Old June 15th, 2010, 01:28 PM   #48 (permalink)
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Chevy 1.2 ULV
30 minutes of use + 9.5 hours of standby = 70% battery left.
WOW

My JuiceDefender widget shows x2.55 and I have never gotten beyond x2.2
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Old June 15th, 2010, 03:14 PM   #49 (permalink)
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I tried Chevy's ULV 1.0 today. So far, I like it just based on subjective temps/battery life - at the very least it matches the best I've seen out of jdflg/P3 when it comes to those two.

With Froyo, it seems like the performance of the phone is more or less a wash above 800MHz for my 'normal' usage, so now to me most of what I'm caring about boils down to just battery life.
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Old June 15th, 2010, 03:38 PM   #50 (permalink)
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So far I did about 30-40 minutes of heavy use and 12 hours from charging. (The baby woke me up @ 4:30 AM lol.
I'm at around 50%. That's pretty damned good!
I'm gonna play around a little more with it and then switch to 1.25 ULV later this evening before I charge her up for the night. I just want to see if there's any appreciable difference in performance. I kind of dubt there will be, in which case I'll go back to the "conservative" (lol) 1.0GHz.
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