[Q] Cm7 installation and yes I have a search key - Galaxy S I9000 Q&A, Help & Troubleshooting

Hello great guru internet:
I have had few issues trying to flash CM7 for the first time and I spent a fair bit of time at it so I think that I did the right things.
OK I started with stock Froyo (JL2 Bell Canada) and then speedmod to get root again and recovery. I also tried EZ base and even EZ boot.
Regardless I seem to lose my IMEI settings (which I think I can restore but any tips on avoiding the need would be great - but I have back ups). Otherwise the install went fine and everything looked OK (via recovery - rom manager seems to have issues too that I have yet to look at and I am fine for the recovery approach). I mean if fine is 1/2 storage and no phone functions....
The bigger issue that I was trying to avoid is the lack of access to the external SD. I understand that it should be now in /mnt/emmc but how come when I open a file explorer it still shows an sd/external_sd (but no data) and no files in the mnt/emmc folder. The system settings also show the space of the existing data as used (ie not included in available space).
So I read that Froyo bootloaders are a must must must and I did did did but still cannot seem to get it. The JL2 firmware does have a .sbl in it as all the 19000m variants were dying and that was part of the fix so maybe that screws up the process? I tried another stock froyo rom but it would not boot. I could try eclair jh2 to EZ base but have not yet as apparently the body still needs sleep.
I have been on GB roms for the SGS (various) but I have been getting some errors with the file system (that is somehow relatedthe external SD - as have some other users in another q/a thread). I started this project on Darky 9.5.
Getting back to JL2 has been OK Thanks to Got_Milk on Cyanogen forums!!! if I had realized that the samfirmware was missing the DB_data for JL2 I would have saved about 1/2 the flashes I've done in the last week.
Any pointers - threads to review (or re review) - thoughts -suggestions - flaming etc?
Thanks
G

Related

[Q] Boot loop after ROM Install via CWM -w/VIDEO

Hi there!
Recently I've been trying to upgrade my SGS with a custom ROM, Darky's 4.0. After installing the ROM as instructed (using CWM and copying the ROM to the internal SD card), the ROM Installs, after the 1st boot it keeps looping, see video:
http://www.youtube.com/watch?v=kWrijyv-8PM (not edited, sorry for that)
Original SGS:
GT-I9000T
I9000TUBJG7
Product code: GT-I9000HKTPCW
kernel: 2.6.28
Build: eclair.ubjg5
The first upgrade I made was via Kies reg-hack to: GT-I9000HKDXEU, 'I9000XXJF3/I9000OXAJF3/I9000XXJF3/I9000XXJF3, and it installed Stock Froyo update. The SGS worked fine with exception of the radio, which didn't lock my 3G over the 850 band.
Currently:
9000M running STOCK Australian I9000UGJG8 (due to radio issues, besides the Canadian ROM, this is pretty much the only ROM which modem.bin's works properly with my network, 3G 850MHz).
FW:2.1-update1
Kernel 2.3.29 [email protected] #2
Eclair.UGJG8
I tried with the following STOCK ROMs prior to the custom ROM install: I9000XWJM1, I9000XWJG5, I9000XWJM9 and I9000UGJH2.
I have ALLWAYS made an SD unmount and format, formatted the cache and factory reset. After it loops, the only way to get it back is using downloader mode and installing a STOCK ROM via ODIN (always do a .512 pit repartition)
Any suggestions to make this SGS get the ROM? maybe the kernel is bad?
Cheers!
Have u tried to format everything (exept for sd) and flash again?
Btw i love infected
Sent from my GT-I9000 using Tapatalk
Format everything? Using which app or program?
I've always used the recovery's wipe commands and the *2767*3855# command. Is that enough? or am I missing another cooler and invasive method ? A friend has suggested to use davlik.
Yeah! Infected rulz, that's what I listen when I'm in the bricking-mood lol
As i saw you have cwm installed... Boot in recovery and select mount and storrage and then select eveeything that contains format (boot wont work to format) and dont select format internal sd but DO select format sd-ext
Edit: if it doesnt work write again then ill upload u the kernel that fixed it for me yesterday. Its from this forum but since ive discovered it by coinsidence, i cant remember how its called. U can format everything then select mout usb storrage (in cwm) and push it on the root of sd. Its an update.zip
Sent from my GT-I9000 using Tapatalk
shrooms90 said:
As i saw you have cwm installed... Boot in recovery and select mount and storrage and then select eveeything that contains format (boot wont work to format) and dont select format internal sd but DO select format sd-ext
Edit: if it doesnt work write again then ill upload u the kernel that fixed it for me yesterday. Its from this forum but since ive discovered it by coinsidence, i cant remember how its called. U can format everything then select mout usb storrage (in cwm) and push it on the root of sd. Its an update.zip
Sent from my GT-I9000 using Tapatalk
Click to expand...
Click to collapse
I gave that a shot, still no cigar. I guess that it goes deeper than just a formatting... maybe that secret kernel u have might brick me... erhm! I mean help me
Shoot! and I'll try it.... this OEM sucky ROM aint working that good over the Australian ROM lol. now I lost access to my cam ! sucks.
Thanx!
Try any universal lagfix kernel with clockwork enabled. Since ur phone is still flashable and ur phone still has funktionality (cwm works) im pretty hopefull that it is software/sd format related. Thats one of those cases where servic centre sais a full flash is needed by now only they are able to do that:-( but till now i always found a way to work around that by trying everything in every way. I always thought my phone is bricked anyhow so it can just get better and by coincidence it worked all of a sudden
Sent from my GT-I9000 using Tapatalk
Ihave I900T with same rom image
and am trying to upgrade to FROYO as well. Any advice on how to do so would be appreciated. Tried the various registry hacks and none have worked. I'm happy to use Odin but not sure which is the correct ROM image to use (from samfirmware). Thanks!
zevrosenthal said:
and am trying to upgrade to FROYO as well. Any advice on how to do so would be appreciated. Tried the various registry hacks and none have worked. I'm happy to use Odin but not sure which is the correct ROM image to use (from samfirmware). Thanks!
Click to expand...
Click to collapse
Well, first thing is first. I've been a couple of weeks away from my SGS tweaking. I'm right know figuring a way to make a backup of my ROM (non-nandroid), in which I can extract the Kernel, Modem and CSC (I received a brand-new unit from my provider, so I will take advantage of it )
That way I can flash them back in case of a screw-up. I didn't have that much luck with modems offered in other ROMs, so I need to keep an OEM copy of my stuff.
Also make a good copy of your /efs folder in case you mess it up. It took me around 3 weeks of reading before I started making any changes to my phone, so I'll recommend doing the same; there's no "quick-start" or quickguide on how to start. You will en up with 6 different windows open reading from everywhere
The FWs from samfw are OEMs. Theres like "not much" of improvemente if you switch to those. Take special attention to the one you chose cause most likely you will lose your 3G and/or 850MHz band. I recommend using only Australian and Canadian ROMs(I9000UGJG8 and I9000UGJH2 worked for me, you might try also I9000UGJK3). Regarding custom ROMs, you will need to try and try until you get it right as our SGS model is not the most popular. This means endless flashing
Cheers.
Sgs froyo flash nam bands
Thanks for the advice. This project consumed my thanksgiving but I finally got a good working SGS in the ATT network. I bought an unlocked SGS from Negri Electronics with the USA 3G bands but it came without FROYO and didn't have the 3 button restore available. After reading and reading (your note about multiple open windows at the same time is all too true!) and trying and trying, I was finally able to get to download mode by installing all the Android SDK tools onto my PC then going in by way of ADB. Far more complicated than a simple registry hack and ODIN but it worked.
I installed the DOC BUJP8 v9 ROM with all the enhancements and AOSP Email (I tried and tried to get stock FROYO email to work with 2 exchange accounts but it was impossibly slow and didn't work) while AOSP is working fine.
It seems, because my SGS had the 850 bands to begin with, that it's working fine. I found this other post on XDA (#770041) that had some keycodes I was able to use (*#2263#) and confirm I still have the 850 band.
Needless to say, make a good backup and be prepared - as already warned - to flash several times and it was ultimately a "trial and error" process that worked.
does anyone have the original brazilian/latinamerican i9000T firmware? I flashed the SGS I got from Negri with spike speedy and it looks like I lost my 850 3G band.
I never did find out how to totally back up the SGS as in back up each PDA, PHONE, and CSC file so as to be able to truly factory default it.

[Q] foreplay with SC-02B (Japan/Docomo) : how to go further ?

Hello people !
Since I'm living in Tokyo, I'm the happy owner of a Galaxy S, but unfortunately it doesn't seem to be exactly the same like the other devices.
Anyway, since 2 days ago, I had some fun (and cold sweat also) trying to root it, unbloat it, etc... Some difficulties and questions left without answers, so if anyone has a guess, please be my guest !
My phone as I got it :
SC-02B, with OMJJ1 firmware (Froyo 2.2)
1) Rooting
The easiest thing ever.
The SuperOneClick pack did a wonderful job.
http://forum.xda-developers.com/showthread.php?t=803682
2) Getting a "safe" firmware
Just in case anything would go wrong, I wanted to be able to flash back to an official firmware.
The ones from this post work without any problem so far.
http://forum.xda-developers.com/showpost.php?p=10558974&postcount=134
However, problem 1 : I couldn't get Heimdall flash my device. Since I'm mainly working on Linux and OSX, that would have been of a great help.
But the "handshaking with Loke" step is always failing...
Actually, I even though I had bricked the phone, since I was stucked with a black screen (1PC and 1GSM in orange) and it took me ages to figure out how to get rid of that.
Solution : get myself a Win 7 computer at office and use Odin. No problem so far with this one.
Problem 2 :after flashing with the official update, I get complains in the recovery mode (when unpacking the apps I think), saying that /dev/block/mmcblk0p3 cannot be mounted, because it does not exist.
After searching on japanese sites, it seems that there is a 3rd partition in addition to the one for /sdcard and /data that is used (as far as I know, only for that) by an app called DioDict (japanese / english dictionary).
Not that this is a great loss, but I don't know where and why this 3rd partition was deleted. I tried to restore one, but after a while I just gave up, since I don't have any dump of the data that was there anyway...
Could anybody confirm/infirm this ???
3) Recovery 2e
Since I wanted to test to other roms, I needed to get back to the recovery 2e.
I gave a try to CF-root, which included that also.
http://forum.xda-developers.com/showthread.php?t=788108
Once again, Odin was the only one that could do the job, Heimdall still ignores me.
Problem : the update is successfully done, but for a reason I ignore, I lose my SIM card in the process.
Flashing back an official ROM makes it available again, but CF-root won't allow me to phone in Japan.
How did you people handle that ? Unfortunately I couldn't afford staying too long without a working phone, so I didn't investigate much further, but did other people have the same kind of problem ?
Conclusion :
As of now, I have a rooted device, and am pretty happy with it.
However, I wish I could give a try to the nice work I've seen around (CyanogenMod on Galaxy S seemed very yummy), while still being able to use my SIM card here.
Any feedback is welcome !
I haven't played around that much with DioDict to tell you right away how to solve this, but maybe there's some answer getting the first firmware:
SC02BOMJJ1 (10/10/13) :
http://fus.samsungmobile.com/Phone_...2BDCMJJ1_SC02BOMJJ1_SC02BOMJJ1_OM_DCM.zip.enc
BINARY_ENCRYPT_STRING 1662317
thanks a lot for this link ! just a question, where did you guys find them ??? the site itself seems very dummy
but as far as I could read on japanese threads, that seems to be some prefab settings
in my case, that third partition has been deleted, so I think I would have to recreate again beforehand.
as for the "how", I must confess I don't know... I' had somehow succeeded in running parted to create one, but for a reason I ignore couldn't assign it to the block
I could install a Cyanogen Beta3 today, and though everything is alright, still got no 3G.
SIM card is not recognized, and it seems impossible to input the appropriate APN information. Could it be that the modem embedded in the SC-02B is different from the mainstream one ?
EDIT : seems that indeed the SC-02B has a different modem. At least the firmware has a different size, hence the need of a different PIT file when you flash from an "international" ROM.
I'm starting to wonder whether I'll see the end of it someday >_<
things that seem to work
Now that we have the capability to recover after we trash our ROM what can we do.
Super Oneclick root - works
Z4Mod "because we all have the need for speed" -works after you use titanium backup to remove some of the bloat-ware from /system
Z4Control works if you use Z4Mod to patch the kernel and convert /data to ext2 first.
The UOTKitchen will work to change the battery icon and other status bar icons if after you have completed these steps http://forum.xda-developers.com/showpost.php?p=9318973&postcount=1290 you extract the framework-res.apk from the resulting zip file and use adb to push the new framework-res.apk to /system/framework/framework-res.apk followed by an adb reboot recovery command before you do anything with the phone. From the recovery menu wipe cache and then reboot now. If you don't do this last step it could lead to having to reflash the factory firmware happened to me about 6 times this weekend. DO NOT TRY THIS IF YOU HAVEN'T CLEARED ENOUGH SPACE ON /SYSTEM BECAUSE IT WILL KILL YOUR PHONE!!!!!
For all those who want a pit file, here I leave you a custom pit file created for the sc-02b.
I must make this clear, this PIT file was made for those who flashed their devices with a rom for some other galaxy s version and want to reflash their devices back to the original SC02BOMJJ1 rom. I cannot ensure you it will be useful or that it will work for anything else.
Also, when using this PIT file with odin, be sure to check the "Re-partition".
@shikigamild :
is this PIT file the same that came from komugi.net ?
at the same time, could you tell me how you got the stock rom file links please ?
@dejanet :
so you say that with the Z4mod you have a fully working device ?
has anyone tried the CF-root package ? after applying it I lost my SIM card, so I wonder if you experimented the same kind of inconvenient there
Oh yes went through all of the fun of trying the various kernels everyone leaves you with sim not recognized.
Sent from my SC-02B using XDA App
Aaarghh,that sucks donkey balls...
Guess that means we won't get any, custom rom any time soon will we?
I'm new to all this stuff, so apologies for the noob questions.
I rooted my SC-02B using the tool in this thread. I was able to install and use the Barnacle Wi-Fi tethering app from the market, so I know it was a successful root. Now when I go to install and use Titanium Backup from the market, it tells me I don't have root access or don't have BusyBox installed. When I go to install BusyBox from the market it shows my phone as being rooted, but when I tap install it gives me a failed message saying my phone isn't NAND unlocked.
How do I do that? Once I get that problem solved, what are the next steps for installing the Z4Mod?
So far I've never installed BusyBox through the market. Just install it with Titanium and it should work fine (click the "Problem ?" button).
Then, I suggest that before doing ANYTHING involving a custom initramfs (like ClockWorkMod), you dump somewhere your mmcblk0p3 partition, in case you want to restore your phone exactly to the same state you got it.
If your not that paranoi, you can skip this part, but as I wrote myself a dozen times here, I forgot it and would be interested also ^^
Ok, thank you for the info. Does Z4Mod cause any problems with this phone? I read in dejanet's signature that the lagfix seems to cause problems. Z4Mod is the lagfix he's talking about right?
bnr32jason said:
Ok, thank you for the info. Does Z4Mod cause any problems with this phone? I read in dejanet's signature that the lagfix seems to cause problems. Z4Mod is the lagfix he's talking about right?
Click to expand...
Click to collapse
z4mod is just a rooting app. There's no lagfix. He's probably referring to OCLF which is made by the same developer. It's obsolete now, so do not use it.
About the rom problem, can't you just flash the modem from a Docomo rom after installing the custom rom?
No, z4root is only for rooting, but z4mod is a lagfix application. As far as i know, it will convert your phone system to ext2. However, i scare it will affect the DioDict application in SC-02B, so i haven't tried it yet.
Trojan,if you fear losing diodict,you can still dump your mmcblk0p3 partition.
It is the one containing diodict data.
I would actually be very grateful for an upload of that one (^-^)/
Sent from my SC-02B using XDA App
trojan111 said:
No, z4root is only for rooting, but z4mod is a lagfix application. As far as i know, it will convert your phone system to ext2. However, i scare it will affect the DioDict application in SC-02B, so i haven't tried it yet.
Click to expand...
Click to collapse
Opps. Didn't realise there are two apps with similar names.
Still, wouldn't suggest it. EXT2 is unstable.
Hi, bebert218. Actually, i am a noob, i don't know how to do it. Can you tell me how to view the partitions in the internal memory? I suppose DioDict application contains a database file somewhere in the internal memory, but i don't know where and what the file name is. Appreciate if you could give me a hand on it. Thanks.
Custom Kernel and Roms
From reading through the forums it seems custom roms present issues with the either the sim card or modem on the sc-02b. Are custom kernels causing issues as well on this phone?
Yes it is the kernel that causes the problem. I think a couple of us have tried them all.
Sent from my SC-02B using XDA Premium App
disappointing Other than rooting and using Galaxy tuner to do some tweaks there isn't really much else to do. At least the upgrade to omka5 showed much improvement from 2.2

Internal SD Dead?

I curently have a bell i9000M I was running Doc's JPY for a few months but decided to his JS8 version the other day. As soon as I flashed it I noticed my phone was unable to install apps and in manage applications it gets stuck on computing.
So things I have tryed to get this working again........
Flashed EZbase using re-partition , still same issue on base.
Flashed Stock JH2 , still same issue.
Flashed Stock JL2 still same issue.
Flashed JH2 then JL2 through Kies same issue.
It seems I can not write to my internel SD although the rest of my phone seems to be working fine any Ideas?
Another thing I noticed is mass storage is not working on any rom only can connect using Kies method if I want to transfer files. Format internal SD is not working , it asks if you want to format you click yes it seems like something happens but then check the internal sd and all the files are still there.
I am not familiar with the I9000M but i know its very common to have SD card failures.
And it seems to me thats whats happened, im sorry for you
best thing you can do is, flash back to stock and send off for repair, hopefully you may get some luck with the next device.
One thing before you get all emotional have a look at this, its a long shot but......http://forum.xda-developers.com/showthread.php?t=905975
azzledazzle said:
I am not familiar with the I9000M but i know its very common to have SD card failures.
And it seems to me thats whats happened, im sorry for you
best thing you can do is, flash back to stock and send off for repair, hopefully you may get some luck with the next device.
One thing before you get all emotional have a look at this, its a long shot but......http://forum.xda-developers.com/showthread.php?t=905975
Click to expand...
Click to collapse
Yea I was not getting any mounting errors in CWM or 2e/3e recovery...Anyway after a frustrating 3 days I now and I think it's finally working , so far.
I manually deleted all files off the internal SD, then did a format from within 3e recovery while on JL2 (this was acting like it was formatting before but all the files I downloaded were still there after the format). Then flashed Hardcore's K13 and installed a custom rom all seems fine so far but it did work periodically over these past few days so I'm hoping it stays working now.
What was weird is I could download files using the web browser but the market would not work all the time but when it did it was downloading the items but would just get stuck installing them.
Anyway thanks for the quick response. Hopefully I have this sorted out now.

[Q] Absolute 'super clean' install - a little help needed...

Anyone done an 'absolute' clean install...? A bit of help needed...
After flashing about 9 different roms over the past 12 months, I would like to achieve a TOTAL wipe of my phone and an install of stock or custom - I have a feeling something is not right in the system image part of the phone... I have used Darky 9.5, 10.2 F, EE, RE, Cericko lite, F1, Ficeko JVH base, Galaxian, dark core, etc etc.
But still i cant get the perfect situation - either bluetooth in car goes (touch handset for nissan) or process.phone FC's.Flashed stock JVR today and still phone FC's after using bluetooth.
I have flashed previously both by CWM and Odin, and you may just say that re-partition in Odin does what i want (wipes system image) but I am not sure - what about the bootloader files etc? Can the internal system image become corrupted? (especially if done ext4/rfs conversions on and off?)
To be fair, the only time it was 'perfect' was on froyo 2.2 BEFORE the .1 update - ever since there has been these niggling issues...
If anyone has got any great ideas please pass them on!! Thanks!!
grab yourself a stock froyo ROM, flash it with all 3 files and 512 pit
boot onto recovery and do a factory reset, wipe cache / dalvick cache then go into mounts and storage (CWM needed) and format cache again, data, and datadata.
format internal and external sd card.
completely clean !!
i'd have to have froyo bootloaders no? And then,flash chainfire cfroot to get cwm? Cann i then upgrade to gb 2.3.4 and believe my system is clean? Thanks so much for the,tips!
dwgalaxys said:
i'd have to have froyo bootloaders no? And then,flash chainfire cfroot to get cwm? Cann i then upgrade to gb 2.3.4 and believe my system is clean? Thanks so much for the,tips!
Click to expand...
Click to collapse
What ROM are you on now ? if you are already on a GB ROM then do the whole procedure with a 2.3.4 firmware, Save the hassle of all that flashing.
If you are on froyo now, you dont need to mess with bootloaders unless you upgrade to GB which states you need them..
hope that makes sense
yes sorry, should have stated am on XXJVQ already and changed yesterday to sensation 2.1 as i was getting probs with all others. This is at least stable after 36 hours so hopefully a working solution - but,if ihave to do superclean i wanted to know how to do. THANKS!!
EDIT - whoops - spoke to soon. Also loss of touch in car Bluetooth with this rom! Have now frozen with TB all BT settings - print/share/opp/bluetooth services etc etc... recovered in car BT touch for the time being - even without any BT entries running!??? shall monitor and see. This is what the issue has been with ALL 2.3.4, 2.3.3 gb versions/roms. I'm stumped if i know what is causing it!
see edit post, thanks!!
Please note that Sam (author of SURFACE ROM) gives a good guide about how to achieve that in this post:
http://forum.xda-developers.com/showpost.php?p=15382251&postcount=2
thats a great post too - i've also downloaded this surface rom in order to try next if the sensation one screws up! Thanks very much!

[Q] Stock Galaxy S; Drowning in Information

Hi everyone,
I have a Galaxy S that is rooted, but runs on stock Froyo.
In the last couple of weeks/months it has been slugging to a slow halt though... when I start it up, it can take tens of minutes to be ready to use. And when I use it, it sometimes shows black screens for minutes at a time.
Using this 'high-end' phone has become a very, very painful process for me.
So I started looking for answers. And I found them. A LOT of them.
So much, I am not sure where to start.
The last few days I have been casually reading and taking in data from this forum, but I have yet failed to form me a proper view of what to do... Kernels, ROMs, speed fixes, modems... help?
I am sorry if I am breaking any rules; I did search, and I did read. However, no thread I found has a proper and up-to-date guide regarding the best way to get my phone to be a powerhouse, not a snail.
(Could I keep my current apps installed?)
I would very much appreciate anyone who is willing to donate some time to get me going. I know some programming and am the families 'go-to-guy' when it comes to computers, so I should be ok once I get some pointers on what to look for.
Thank you for reading (and responding?),
MM
I dunno if this will help you anyway i'll post it http://forum.xda-developers.com/showthread.php?t=939752
I did read that; thanks for the suggestion though.
It doesn't really go into kernels/roms/modems etc. which my main confusion is about.
I just downloaded darky's ROM... Reading their site, but I am afraid of losing my apps, not going to 2.3, having it interfere with my lagfix etc. =/
If you are afraid of loosing apps you can use titanium backup. You can download it from the market. I can't tell you anymore because that thread explains very well what you have to do. But i can say that after some time it will be very easy and you will not be afraid to flash a kernel or a rom. I post this too but i think you have read this too http://forum.xda-developers.com/showthread.php?t=723596
I did read that... I missed the 2.2 / 2.3 part however.
I planned on using Darky's ROM but that link says its a Froyo ROM.
Which one is better, currently; Cyanogen (Gingerbread) or Darky's (Froyo)?
Edit: also, while that post lists a lot of options, it in no way goes into which is the best option for which people...
Increasing the confusion a little bit more, so to speak.
Try cyanogenmod and darkyy rom and decide which is the best. I can't recommend anything you have to decide. But i suggest to upgrade to gingerbread. Your phone will get smoother. (darky's 10.2 is based on jvq a 2.3.4 gingerbread firmware). Link: http://forum.xda-developers.com/showthread.php?t=1061946 http://forum.xda-developers.com/showthread.php?t=814091. Remember: with cyanogenmod you have to use different kernels
Mad Maniak said:
The last few days I have been casually reading and taking in data from this forum, but I have yet failed to form me a proper view of what to do... Kernels, ROMs, speed fixes, modems... help?
MM
Click to expand...
Click to collapse
I'm a noob but I'll try to clear out few things for you.
From what I understand ROMs are like operating systems you use on PC.you currently have a froyo ROM running and flashing a gingerbread ROM will be like going from windows XP to windows 7.
when you download a ROM and unrar it you'll see 3 files.
PDA is the main one. PDA is Android and the apps that come with it. MODEM is the firmware of the wireless chipset of the device, it controls WiFi, Bluetooth and 3G/2G/GSM connections. The CSC holds connection data for the broadband networks as well as apps that are only available in certain languages/intended for a specific area or operator.
A kernel is like the heart of the operating system.It manages the system resources and acts as bridge between the software and hardware.
Now there are stock kernels and custom kernels. when you flash(install) a stock ROM all the necessary things are installed along with the stock kernel.
But if you wish you can flash custom kernels over stock kernels.
The speed/lag fix things you have read are basically conversion of file systems to enhance the I/O performance of your phone. You should know of the NTFS,FAT32 file systems in windows, similarly you android phone can have RFS,EXT4 file system. when you flash a stock rom RFS is default file system that gets installed.Many say that this RFS is to blame for the lag,slowness in our phone so what we do? we convert to EXT4. but to convert to EXT4 you need to be running a custom kernel.
So let me tell you this go on and flash a stock gingerbread rom, Im using the latest stock 2.3.4 XXJVR and you should try it. then you flash the voodoo kernel for XXJVR. it'll root your phone,convert the file system to EXT4.
reply if you have confusions.
cheers
Now you are on froyo. If you want to upgrade to gingerbread you should loose your application. Because if you backup your application using titanium backup or any other software from froyo. Its not advisable to restore in gingerbread. It will give always problem. So better way is download Drakys v10.2RE and do a fresh install.
http://samsung-sgs.blogspot.com/2011/08/how-to-flash-darkys-rom-v102-re.html
This happened to me once, when I was already on Froyo, lagfix activated, etc.
Took forever to boot, and was slow as hell.
Reason: faulty microsd card. The phone kept trying to read from it, and was unable to. I tried taking out the card and... voilá!
You could be still on Éclair and no lag fix activated, the phone would never behave like that. Try taking out the microsd card.
(Couldn't even read the card in the computer, so you see).
Hi guys, a small update:
I got Darky's 10.2, which is VERY smooth.
I reformatted my external microSD and put my stuff (music) back on it. Clean install on the internal SD.
It is a very enjoyable device once again. Two issues:
-It sometimes hangs on a black screen which I can't get out of with the home button. It seems only a battery in-and-out fixes this. (This issue worries me; is the internal SD corrupted?)
-The external microSD sometimes needs to be ejected and re-inserted to work.
Any solutions regarding that? Should I get a new microSD, or even contact Samsung to ask for a new phone (especially the first issue worries me... a lot).
Again, thanks a lot for the very extensive answers.
Especially marib; your post was very informative, and I'll be keeping a bookmark of it for future reference... thanks!
I think you could search for this issues in the darky's thread and if not found post the issue there to get a promt solution.
forum.xda-developers.com/showthread.php?t=814091
Yeah, figured as much.
Will be tackeling these issues in the weekend.
Just thought of posting them in this here thread too. Might have gotten lucky, and the thread was here anywho.
Again, thanks.

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