[Q] Question about roms and cf-root - Galaxy S I9000 Q&A, Help & Troubleshooting

I am new to the android world, and reading about what to do with my shiny new Galaxy.
I read about roms, JPa, JPM, JP6 and so on. What is the difference between all of these roms, and why should one use these, rather than the official Samsung versions?
Next, I read about applying cf-root kernels. What is the benefit of this?
If there is a nice peace of reading on this, I would be greatfull.
Thx.

All Rom tweak the sgs in there own way. Some don't like how sgs is and changed that.
There also custom kernels.
This is often to speed up the sgs.
They can tweak some settings or converting the filesystem to a better one.
I do preferred original firmware with a custom kernel.
I use my own kernel and use ext2 filesystem to make the phone fast.
Sent from GT-I9000 jpo. My own kernel for z4mod and with 342MB Ram

Pretty much as DamianGto said its a personal choice i also go for stock firmware jpa in my case from samfirmware with cf root kernel. Custom kernels do various things from spead tweaks to colour adjustments. I'm running stock jpa with cf root kernel this gives you root with 2e recovery then i just used oclf from the market for the lagfix had this combo for a while and works perfect.

I would stay away from cf-root kernel. Its way to big and a bad way to root.
Oclf was good, but its an old way to lagfix. You should use a kernel isteed. Its smother and all is faster.
Sent from GT-I9000 jpo. My own kernel for z4mod and with 342MB Ram

Thank you.
I'm not sure what is the firmware and the kernel. And not yet sure what all those different jpm, jpa, jpk, jp6 versions mean and do.
Furthermore:
I have flashed froyo, using odin, with the JPM version.
Now I found out that I have that gps problem too. The default *#*#1472365#*#* option does not work on my sgs. Any sugestion on this?

Ho.
Jpm is not the latest firmware.
In froyo you use this *#3214789650#
Sent from GT-I9000 jpo. My own kernel for z4mod and with 342MB Ram

hello, i want to flash my sgs to froyo, i am looking in the custom roms do you guys recommend any custom roms or kernels... i dont want to use the stock ones cuz i know there is always something you dont need and you dont use...
Do you think is better to use OCLF or voodoo with ext4?
thanks!

Well its a personal taste what you use.
I only use my own kernel to speed up the system and get more memory. The rest i use mod i se and like. I have not seen any rom that have things s want.
Oclf is old and you should use kernels with lagfix.
Use ext2 if you want a fast filesystem.
Sent from GT-I9000 jpo. My own kernel for z4mod and with 342MB Ram

Browse around in the android dev subforum, I'm using doc's rom, bunch of other people use darky's.
If you use a custom kernel, those usually have a lagfix inbuilt which you enable in the recovery menu, you don't need to use voodoo or OCLF on top of that. (Custom roms usually have custom kernels)

DamianGto said:
Ho.
Jpm is not the latest firmware.
In froyo you use this *#3214789650#
Sent from GT-I9000 jpo. My own kernel for z4mod and with 342MB Ram
Click to expand...
Click to collapse
So which one is the latest (stable) version?

so you reckon darkys is one of the best custom roms to get? is it stable?
Sent from my GT-I9000 using XDA App

Androphone said:
So which one is the latest (stable) version?
Click to expand...
Click to collapse
Jpo. Jpp. Jpa. But all is based on Jpm.
Sent from GT-I9000 jpo. My own kernel for z4mod and with 342MB Ram

Related

which is the fastest and most stable firmware?

With froyo being out I'm tempted to flash my JM8 device to the new froyo... However I'm wondering if froyo is actually faster, more stable and has an improved GPS.
Should I flash to JM9 or to froyo?
Other than that, which lag fixes should I use and tweakers?
there's so many roms out that I've lost overview and don't really know what's the best and most stable.
Please post questions in the Q&A forum.
well I'm using doc v7 rom with no rfs advanced ext4 lagfix. I m having litraly no lag... Evrythin's working super smooth. I'm using adw instead of touchwiz
Sent from my GT-I9000 using XDA App
I'm not just talking about fast, but also wonder which one works best in terms of features such as GPS
Only way to know for sure is to test it yourself, I find JPM to be ok but I'm also using one of them optimized 341meg roms as stock froyo only lets you see a max of 300megs. Also there seems to be a few more stupid startup processes running which you can turn off with startup manager (from market). The thing is that its this new kernel i'm using that gives all the speed.
i found JPA is faster than JPO. I have tested on 2 diffrent phone.
JM9 is probably the best Eclair ROM. And with FroYo just being officially released the latest ROM is JPO.
It's really up to you what to do at the end of the day.

[Q] Replace Kernel in Cognition v2.3b8?

Hi Guys,
I just got my Captivate couple days ago. I were able to unlock, root, get a new ROM (Cognition v2.3b8) and install some apps. I'm looking to get a new kernel for the ROM. How would I go about flashing it to a different Kernel like SpeedMod K12I ? Thanks.
Sgs kernel flasher app in market
To be safe always disable lagfix prior. App is very easy to user and quick
Sent from me
adrian18w said:
Hi Guys,
I just got my Captivate couple days ago. I were able to unlock, root, get a new ROM (Cognition v2.3b8) and install some apps. I'm looking to get a new kernel for the ROM. How would I go about flashing it to a different Kernel like SpeedMod K12I ? Thanks.
Click to expand...
Click to collapse
I am a noob here. But I am wondering what are/is the benefits/risk of replacing the kernel that comes with Cog v2.3b8 with another. I recently flashed Cog v2.3b8 from stock (batch 1006), and find this is pretty much as stable as stock. Only issue is with GPS (which was hit and miss on stock). So do the benefits of replacing the kernel in Cog v2.3b8 outweigh the risks?
Thankshttp://media.xda-developers.com/images/icons/icon7.gif
Well kernels have different features and abilities in them. It depends what you want from your kernel. Some might support BLN while others will have OC/UC or just OC. Various combinations of options. You just need to make sure that the kernel/ROM/modem are from the same family, etc. I9000 or Captivate. If you flash a i9000 kernel into a Captivate ROM you might have issues.
Cog v2.3b8 is a Captivate ROM I believe. You can flash Kernels which are for it.
cog runs fine with an i9000 kernel so long as you also use an i9000 modem. i can't run the i9000 roms because of service drops but this set-up is still very good.
Kernel flash
adrian18w said:
Hi Guys,
I just got my Captivate couple days ago. I were able to unlock, root, get a new ROM (Cognition v2.3b8) and install some apps. I'm looking to get a new kernel for the ROM. How would I go about flashing it to a different Kernel like SpeedMod K12I ? Thanks.
Click to expand...
Click to collapse
If you want to install a new kernel over the existing kernel,
1. Download the Kernel from http://forum.xda-developers.com/showthread.php?t=893880
2. Go to CWM recovery. (directly or through ROM Manager)
3. Choose the zip from SD
4. Flash and Reboot.
Make sure that there is atleast one boot after the ROM is installed.
To confirm,
check Kernel Version in Settings-> About Phone
You should see something like
[email protected]#116
Kernel benefits/risks
jperiod said:
I am a noob here. But I am wondering what are/is the benefits/risk of replacing the kernel that comes with Cog v2.3b8 with another. I recently flashed Cog v2.3b8 from stock (batch 1006), and find this is pretty much as stable as stock. Only issue is with GPS (which was hit and miss on stock). So do the benefits of replacing the kernel in Cog v2.3b8 outweigh the risks?
Thankshttp://media.xda-developers.com/images/icons/icon7.gif
Click to expand...
Click to collapse
Well each kernel has it's own benefits.
For instance, Speedmod uses sztupy's Universal Lagfix unlike other Kernels that use Vodoo Lagfix.
The main differences would be in the speed and battery. Samsung uses 250hz (as default), firebird kernel uses 300Hz and Speedmod uses 500Hz. Doesn't change battery consumption much but provides more smoothness.
Then the RAM Available. It varies from Kernel to Kernel from 300-350MB.
Cappy Kernels are for Captivate Only because of reorientation fixes and button mapping.
Hope this helps

Which kernel is better: speedmod or voodoo?

hey guys,
im using the voodoo kernel at the moment but i want to know whether the speedmod kernel is better.
what's the difference between those two ones? which is more reliable? which is the faster one?and which has a better battery life?
my second question is wheter a lagfix is still needed for the kernel. i heard the lagfix needs more battery.
ty in advice
Its a matter of personal preference.. You should try both kernels and conclude for yourselve..
but can you say something in general? there should be some differences...
ty
i'm using Stock JS3 with voodoo 5.2 and there is zero lag, and battery life is fantastic (after removing most of the samsung bloatware).
I really don't see any need for any of the extra 'fixes' the other kernals add
You can read the differences on both kernel's pages.
Which is better: apples or bananas? It's all based on opinion. Flash one, if you don't like it, flash the other.
I prefer voodoo,
At the moment im using the advanced kernel v666.2, and its bloody awesome.
Supercurio says voodoo doesnt increase battery life, so rock on!
Speedmod, whilst good as never been as smooth for me, even 500hz versions.
Sent from my GT-I9000 using Tapatalk
tmzbeme said:
i'm using Stock JS3 with voodoo 5.2 and there is zero lag, and battery life is fantastic (after removing most of the samsung bloatware).
I really don't see any need for any of the extra 'fixes' the other kernals add
Click to expand...
Click to collapse
How did you remove the samsung bloatware?
There isn't an option to uninstall them anywwhere..
dogans said:
How did you remove the samsung bloatware?
There isn't an option to uninstall them anywwhere..
Click to expand...
Click to collapse
Root your phone and get titanium backup.
Sent from my GT-I9000 using Tapatalk
I think either kernal is good. Have used both and not much difference between the 2. My personal opinion- speedmod feels a little smoother than voodoo. Was using voodoo for a couple of months but now on speedmod.
Sent from my GT-I9000 using XDA App
CZECHer said:
but can you say something in general? there should be some differences...
ty
Click to expand...
Click to collapse
One difference is voodoo is compiled by supercurio and the other by hardcore.
Sent from my GT-I9000 using XDA App
ty guys. i think i will stick to voodoo. actually i have the 5.2 version istalled on my gt-i9000.
but is there a thread in this forum where i can check for the latest voodoo kernel? i didn't find it...
5.2 is the latest version.. You should check project-voodoo.org for updates or folkow his voodoo sound thread
ty a lot. now i'm fine
Seems to me voodoo is bit smoother and speedmod has maybe better battery life.
You should get CWM Recovery and try for yourself since it's so easy to switch, I am on Darky's Ron and currently using Voodoo. But I was on Speedmod before 9.1 and I can't find any difference in their smoothness. The batterylife is more depending on your Rom and settings.
Happy flashing
Sent from my GT-I9000 powered by Darky!
I switched rom and kernel at the same time. So I can't fairly compare both kernels.
I appreciate Speedmod's kernel because it has tun support for Openvpn.
for me, I use speedmod as it has better battery life
I use SpeedMod, for the performance tweaks. I did briefly use supercurio's kernel, but then switched over to hardcore's, chiefly because of how it was geared at performance and efficiency, or so it said, anyway.
To the extent of my limited knowledge, I can summarise their technical advantages as follows:
Advantages of SpeedMod
Various optional performance boosts - promises battery and speed improvements, but I haven't actually done any tests for proof
Customisable lagfix - can choose from different file systems (ext2, ext3, ext4, ext4nj, rfs, jfs) and where to apply them (data, system, etc)
Advantages of Voodoo
Simplicity - lagfix (and other tweaks) automatically apply on boot, no need to ever go into recovery mode
Both have colour and sound tweaks (SpeedMod uses Voodoo Sound), and generally are very stable. You might also find less of a need to update
g00ndu said:
One difference is voodoo is compiled by supercurio and the other by hardcore.
Sent from my GT-I9000 using XDA App
Click to expand...
Click to collapse
You don't say...
I guess voodoo is much better. I haveused both of them but speedmod has a lot of problem like screen brightness which will never be fixed! althou hardcore claims to have done so. about the battery consumption you can not say which of them is better cuz it depends on your rom. on Darky voodoo saves more and speedmod drains ur battery. that is why Darky switched to voodoo in his latest roms and if you install darky rom configurator you will see that voodoo is recommended.
I prefer the speedmod kernel because you have the choice in regards to optimizations and lagfixes. The latest kernel (k12u) really speeds up my gps fixes!!!
Stock XXPY + JPA WiFi driver, rooted, speedmod k12u 500hz
Speemod kernels are being updated almost daily,so the easiest way is to get used to using cwm recovery!

[Q] Kernel mix/match

So I understand the i897 roms have to have i897 modems and vice versa with i9000. I've been searching for about an hour, but can only find that same answer I already just posted. My question is, can you use an i9000 kernel with an i897 rom? Since its an i897 rom, I would need to keep an i897 modem correct? Or would I use an i9000 modem due to the kernel. The reason I am asking is I would like to OC/UV. I liked the speed I got from Firefly, but not the battery life. So I went back to stock Froyo. I'm just going to stick with stock, root, remove bloatware, OC, and call it good. I just use it to play with when I'm bored in class and text/call, and stock does that just fine for me. Just want OC. TIA.
There are Froyo I897 kernels that support OC/UV, BLN, Voodoo, etc. I believe froyo is less picky and it is possible to mix and match i897 roms with i9000 kernels but that is not possible on GB. But as I said before you can use a I897 kernel if you just want OC/UV. (good kernel is Design Gear's Cognition 4.x.x kernel)
And since u r gonna use an i9000 kernel, u need to use an i9000 modem to avoid problems.
Kernel and modem need to be paired--i897 with i897 -- i9000 with i9000... (in order to not have issues)
Sent by XDA Premium App

[Q] Corn kernels

I've been using all kinds of kernels for Cappy. What I just want to know is what's exactly the difference between this kernel: [KERNEL][XWJW1][2/1/11] Corn Kernel I9000-C v1.05 w/Audience support!
And this one:
KERNEL][KK4][1/28/11] Corn Kernel v7.06 from Source (OC, BLN, Voodoo Sound, etc.)!
Thank you guys in advance.
Z1nK said:
I've been using all kinds of kernels for Cappy. What I just want to know is what's exactly the difference between this kernel: [KERNEL][XWJW1][2/1/11] Corn Kernel I9000-C v1.05 w/Audience support!
And this one:
KERNEL][KK4][1/28/11] Corn Kernel v7.06 from Source (OC, BLN, Voodoo Sound, etc.)!
Thank you guys in advance.
Click to expand...
Click to collapse
This kernel [KERNEL][XWJW1][2/1/11] Corn Kernel I9000-C v1.05 w/Audience support! is for i9000 based roms.
This kernel [KERNEL][KK4][1/28/11] Corn Kernel v7.06 from Source (OC, BLN, Voodoo Sound, etc.)! is for i897 based roms.
that's what i first thought.that and the audience chip is maybe onky supported in one of them.but i thought there had to be a better reason.guess i was wrong.
thank you for answer.i appreciate it.
how can you tell if a rom is i897 based or i9000?
are kk4 cappy roms and xxjvu or jw1 i9000 roms? if i got that right.
Z1nK said:
how can you tell if a rom is i897 based or i9000?
are kk4 cappy roms and xxjvu or jw1 i9000 roms? if i got that right.
Click to expand...
Click to collapse
You got it. Ones that start with a K are i897, ones that start with a J are i9000.
thank you sir.
I tried using both kernels for apex and neither of them worked.
but i also read somewhere that apparently corn kernels dont like ext4.
not necessarily... cappy had some that started with J way back when....
the roms that are ported will usually say so, but all roms come with a working kernel for it.
then if you want to change kernels, for one reason or another, you look for one that supports your rom build version, no matter what you will end up searching for the right kernel.
Z1nK said:
that's what i first thought.that and the audience chip is maybe onky supported in one of them.but i thought there had to be a better reason.guess i was wrong.
thank you for answer.i appreciate it.
Click to expand...
Click to collapse
Audience chip works in both corn kernels. That's what separates corn from the other i9000 kernels (among other things). That way, if you prefer i9000 roms over i897 roms, you can still get audience support. The catch is you have to flash an i897 modem also, which for some people breaks Bluetooth calls.
Sent from my SGH-I897 using XDA App
Z1nK said:
thank you sir.
I tried using both kernels for apex and neither of them worked.
but i also read somewhere that apparently corn kernels dont like ext4.
Click to expand...
Click to collapse
Apex is an i9000 based rom so im not sure why the i9000 corn kernel didnt work. I would recommend you try some of the ics roms. Im on Doc's Master ICS and im getting the best battery life and speed from ics roms than i ever got on gingerbread roms.
Z1nK said:
thank you sir.
I tried using both kernels for apex and neither of them worked.
but i also read somewhere that apparently corn kernels dont like ext4.
Click to expand...
Click to collapse
Corn Kernel I9000-C v1.05 supports ext4 - I'm on Apex 12.4 with that kernel and ext4 without any issues in that regard. I ensured I was on RFS before flashing corn and then converted to ext4 via the kernel's recovery.

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