Troubleshooting Tips To Jailbreak iPhone, iPad And iPod Touch On iOS 4.2.1 Using Greenpois0n

Chronic Dev Team

Chronic Dev Team had released greenpois0n to jailbreak iOS 4.2.1 for Windows for iPhone 4, iPhone 3GS, iPhone 3G, iPod Touch 4G,iPod Touch 3G and iPad few weeks back.

If you had trouble jailbreaking your iPhone, iPad or iPod touch using greenpois0n then here are some troubleshooting tips based on inputs from our fantastic readers that we hope will help you in successfully jailbreaking your iOS device.

Use the latest version of greenpois0n:

Chronic Dev team have been releasing new version of greenpois0n to fix issues. So ensure that you have downloaded the latest version of greenpois0n either from or this mirror site.

Step-by-Step Tutorials:

Mac users can follow our step-by-step guide to jailbreak their iOS devices on iOS 4.2.1 using greenpois0n below:

Windows users can follow the appropriate step-by-step guide:

Run as Administrator

If you’re a Windows XP user then try running greenpois0n as ‘Administrator’ (right-click on the greenpois0n exe and select ‘Run as an Administrator’)

Disable Virus Protection And Firewall

If you’ve anti-virus or Firewall running in the background then please temporarily disable it. Some users have reported issues with BitDefender anti-virus.

Connect your iOS device directly to your Mac or PC

Connect your iPhone, iPad or iPod touch directly to your Mac or PC rather than via a USB hub.

Keep Holding the Home button:

After putting your iOS device in DFU mode, don’t release the Home button. Keep holding the Home button until greenpois0n informs you that the jailbreaking process is complete.

Ignore the Unable to Find gBdevList, fs_mount, fs_unmount, fs_load_file Errors:

If you see the following error message on the screen during the jailbreak process:

Unable to find gBdevList

Unable to find fs_mount

Unable to find fs_unmount

Unable to find fs_load_file

Ignore the errors and continue holding the Home button and wait for the jailbreak process to complete.

Cydia Option Missing in Loader App:

If you don’t see the Cydia option after launching the Loader app to install it then either keep trying by quitting and relaunching the Loader app again or using Redsn0w 0.9.6 RC8 (download link) to install Cydia by selecting the ‘Install Cydia’ from the options.

Clean Restore:

Greenpois0n recommends a clean restore so if the above tips don’t work then you can try to restore your iOS device if you desperately want a jailbreak as it is not ideal.

We hope one of these troubleshooting steps help you in successfully jailbreaking your iPhone.

As always, let us know how it goes.

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  • jdb

    Awesome, thanks!

  • nymkhan8

    one more thing, if you don’t want the animated apple skull icon you get after jailbreaking with greenpois0n. you can ssh into your iphone (using ifunbox)go to usr\bin and delete animate, then you won’t get it anymore. (iphonehacks, i think this would be something worth going up into the post)

    • WhoNeedsToGetALife?

      Is there an APT_GET command to uninstall instead of just deleting. Rather avoid open calls to animate by removing the call altogether.

      Also, if there’s any battery issue tips, I’d LOVE to see some that people have had success with. My next step is a fresh install, jailbreak, then restore. :(. Rather avoid the icon shuffle turmoil though.

      • nymkhan8

        i don’t understand what you mean. please explain more

        • Anonimo200

          I think he refers to the fact that on the iPad the battey icon does’t turn red when the charge is 20%. I have been restoring/updating and it works fine in 3.2.2 but not in 4.2.1 so it’s probably a bug. What is more: if in 4.2.2 you run an iPhone app the icon turns red…

  • Lawsangel

    iPhone 3G / windows
    As far as I’m aware greenpois0n does not support the 3G
    Can anyone confirm this?

  • good news, now i can use my blackberry

    • fas

      what is the connection?

  • Ian P

    Titanss – Snowbreeze 2.2 does work on 3G phone. I used it to jailbreak mine

  • adawg

    does the jailbreak bypass the activation?

  • mahendra

    help needed please……..iphone 3G.
    version 4.2.1
    firmware 05.15.04
    how do i jailbreak this one, my contract will be over soon and the phone will be mind ,so i will ring them up to unlock it.but i want to jailbreak it now,so please help me if you can,thanks!!!!

  • Sohail Ahmed

    hi guys
    I jailbreak my iphone 3gs on 4.2.1 by green poison but since than the battery of my iphone dropping very fast.
    Any solution plz!!!!

    • Try to change your settings. It is due to the new feature called ping.

  • jj..

    ive recently jail broken ipod touch 4th gen,cydia appears on home screen but wont open when i click on it,and tried reinstallin it through loader but it just says its already installed,any ideas??

  • Jay

    My camera and photos will not load properly after jailbreaking, has never happened before with other jailbreaking methods… Has this happen to anyone and is this fixable? it keeps saying loading library then closes out of the app…

  • Griffin

    my ipod is only staying on the black screen with white writing. what should i do?

  • C.

    Same problem as Griffin, its just stuck on the black screen with the white writing and every so often it adds to the list with ;
    ”AppleS5L9820XIOIopManager::init( ): Failed to get AppleS5l9820XARM7M after ____ sec.”

    • movar

      i have exactly the same problem how do you fix it (ipod touch 3g 32gb 4.2.1) ???

  • Rod

    I also have the 4.2.1 version with the 05.15.04 firmware I can’t get anything to jailbreak my Iphone3g. I tried one and it just ended up crash my whole phone I had to reboot the phone and lost everything but my pics. I just want a jailbreak to actully work on my unlockable iphone

  • Justis

    can someone please help me? i have jailbroken my ipod touch 4G with greenpoizon ad it was great. But after a fiew hours the cydia app went missing. the loader app says tha cydia has been istaled. I dont know what to do. Please help.

  • ZenMonkey760

    I’m getting the same black screen and error message that Griffin wrote about. Just sits there doing nothing until the error comes up. Just updated my ipod Touch 4g on 28/March w/ latest update from Apple.

  • petey

    jus tried to jailbreak my ipod touch 2g 4.2.1 mc using greenpoison rc 6.1.followed all steps and got to jailbreak screen.loaded green and waited 4 ipod is now off.blank.and wont turn on.please help!!!

  • hayden

    Same issue as a few others. I ran through all the proper steps, for my iPod Touch 4g. Stuck on:

    Any remedies???

  • hayden

    OK, Got it sorted, boots up just fine. But I don’t have this “Loader” that was mentioned. Does not look as though greenpois0n did anything…

    • Mykill456

      i had the same probem it worked fine with the writing and then rebooted to the home screen and there was no Loader app Someone please help me????!!!

  • Maia

    hey so i just tried to jail break my ipod twice and the first time when it when to the apple screen it wasnt jail broken and so so this time i didnt hold down the home button, well i did for the first half but my thumb got tired, and it still hasnt finished, is that bad?? my brother said it dosnt take long for him, and hes never had to hold down the home button, will it still work?? and how much longer should i wait for it to jail break??

  • Maia

    ps.. its still “jailbreaking” and its been like 10 min. :s

  • Maia

    oh.. its the same problem griffen is having, any help would be greatly appreciated 🙂

  • James

    Hey I’m running this for my iPhone 3gs and it won’t reboot after I finish the jailbreak. Any tips or help?

    • macy

      Same with mine. Hold the power and home buttons and it unfroze. but was not jailbroken

  • helpme

    help help it’s not doing anything the last thing it’s saying is ‘AppleS5L8920XIOPSDIOIopManager::init(): Failed to get AppleS5L8920XARM7M after 1 30 sec.’

  • helpme

    also it won’t let me restore it it’s not coming up in iTunes

    • muz2000

      AppleS5L8920XIOPSDIOIopManager::init(): Failed to get AppleS5L8920XARM7M after 1 30 sec

      Any update on this issue, mine came to the same problem. Cannot turn off the power, it’s just stay on the same screen and keep on repeating the problem for 8 times (total time about 9 min)

      Please help

  • muz2000

    found the solution… Press and hold the power button and the home button… you will get back to the initial device condition…

  • Matisha

    Same problem with my iPod 4th gen. After jailbreaking is complete there’s just the black screen with lots of text ending in ‘Failed to get AppleS5Lblahblahyadayada after 1.30 sec (and later after 2.50, and 3.70 and so on, if I just let it sit there it goes on forever, but it never reboots).
    I know I can reboot manualy by pressing the power and home button at the same time, but then nothing has happened.
    Still no solutions, or answers to why this problem occurs?

  • Abby

    Every time i try to jailbreak, my screen will be black with a lot of texts, then the screen freezes, and does not reboot. When i manually reboot it my phone is the same as before.

    • Jay

      I had the same issue.

  • mounika

    my phone got switched when i tried to jail break and i cannot turn it on./.. can u tel me what is the problem?

  • vasantraj

    I want to remove cydia from my iphone, any one knowing this please help me.

  • Bentz

    I have a major problem with my ipod touch 2g. I jailboke it for a little while but then it started taking screen shots by itself, going to sleep mode by itself and then waking itself up again. I restored it but it still has the problem. What should I do?

  • gadz

    what to do while jailbreaking iphone stuck on green poison logo

  • Kiara

    all i want to know is how do i get cydia OFF my ipod….its 4gen (8gb) if that helps

  • Jay

    I tried this TWICE and the “Launcher app” never showed up. WTF??