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Discuss DFU-Mode directly after reboot at the Hardware - Hackint0sh.org; Hello Gentlemen, I got a iPhone which just reboots in DFU-Mode. Nothing on the scrren, ...
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    Default DFU-Mode directly after reboot

    Hello Gentlemen,

    I got a iPhone which just reboots in DFU-Mode. Nothing on the scrren, but iTunes recognises it.
    No recovery cycling ;-) I already tried everything...iRecovery and also iTunes with any kind of firmware...
    iTunes always files an error: "device returned AMR error 6". This is after iTunes starts the iPhone in recovery mode and loads the firmware but before it tries to validate the firmware.

    I read somewhere else, that the 8GB NOR/NAND Flash might be the problem because the flash's signature is wrong. Then the boot-loader directly jumps to DFU-Mode at boot-up.

    Could this be solved by hardware or software (which i doubt).

    Any idea how to fix this?

    Thanks and regards,
    Thomas



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    Super Moderator Array Olethros's Avatar

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    Quote Originally Posted by tom1964 View Post
    I got a iPhone which just reboots in DFU-Mode. Nothing on the scrren, but iTunes recognises it.
    No recovery cycling ;-) I already tried everything...iRecovery and also iTunes with any kind of firmware...
    iTunes always files an error: "device returned AMR error 6". This is after iTunes starts the iPhone in recovery mode and loads the firmware but before it tries to validate the firmware.

    I read somewhere else, that the 8GB NOR/NAND Flash might be the problem because the flash's signature is wrong. Then the boot-loader directly jumps to DFU-Mode at boot-up.

    Could this be solved by hardware or software (which i doubt).

    Any idea how to fix this?
    What model iPhone?
    Please read the stickies & search forum before posting!
    How to report an iTunes restore/update fail in a useful manner
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    iPhone 8GB (3.1.3; Pwnagetool) AT&T Locked - Unlocked with bootneuter

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    Quote Originally Posted by Olethros View Post
    What model iPhone?
    Sorry forgot to mention...
    It's a 3G 8GB...

    Cheers,
    Thomas

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    Hi folks,

    I think, i norrowed down the issue with DFU-Mode directly after Reboot.
    Even trying to restore the firmware doesn't help. I tunes always hang-up at Verifiying Restoreinformation... I tapped the communication between iPhone and iTunes and discovered the following (see protocol below).
    What is interessting is, that the the iPhone would not be able to set the variable boot-args to 1 in order to get out of the restore loop!
    "/usr/sbin/nvram.nvram: Error setting variable - 'boot-args': (iokit/common) general error.error setting 'boot-args' to '': 1"This also the explaination why iTunes hangs-up in a loop, since it is waiting for a positive response from the iPhone.

    Is it possible that the NVM directory is somehow set to read only??? and that is why the iPhone can not get out of the loop!
    btw: iRecovery is also not able to set the variable in a correct way.

    Does someone have a clue what went wrong?
    Any modified code at boot-code available which allows to set the right permissions to the nvram directory?

    Please help.

    TIA and cheers,
    Thomas
    -----------------------------------------------------------------
    <?xml version="1.0" encoding="UTF-8"?>.<!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd">.<plist version="1.0">.<dict>..<key>AMRError</key>..<integer>6</integer>..<key>Log</key>..<string>leMRVL868x: Loading Main Program.AppleMRVL868x: Firmware loaded..AirPort: Link Down on en0.AppleMRVL868x: Command line options and current values used by driver.AppleMRVL868x:
    marvel-debug=0x88.AppleMRVL868x:
    marvell-feature-flags=0x3f.AppleMRVL868x:
    mrvl.ps.unicast_timeout=100.AppleMRVL868x:
    mrvl.ps.multicast_timeout=10.AppleMRVL868x:
    mrvl.ps.entrance_timeout=15.AppleMRVL868x:
    marvell-powersave-listenint=1.AppleMRVL868x:
    marvell-retry-limit=15.AppleMRVL868x:
    marvell-sdio-pulldowns=-1.AppleMRVL868x:
    WTE=0x0.[FTL:WRN] Failure running _LoadFTLCxt!.[FTL:WRN] Recovering NAND Data Structures - this will take some time!.AppleMRVL868x Hardware Details:. Firmware Version: 9.108.5.p1 (0x01096c05). I/O Version:
    0x0002. Hardware Version: 0x0012. Mac Address:
    00:25:bc:ad:0f:ea.found suitable IOMobileFramebuffer: AppleH1CLCD.AppleSynopsysOTGDevice - Configuration: PTP.AppleSynopsysOTGDevice

    Interface: PTP.AppleSynopsysOTGDevice - Configuration: iPod USB Interface.AppleSynopsysOTGDevice

    Interface: USBAudioControl.AppleSynopsysOTGDevice

    Interface: USBAudioStreaming.AppleSynopsysOTGDevice

    Interface: IapOverUsbHid.AppleSynopsysOTGDevice - Configuration: PTP + Apple Mobile Device.AppleSynopsysOTGDevice

    Interface: PTP.AppleSynopsysOTGDevice

    Interface: AppleUSBMux.AppleSynopsysOTGDevice - Configuration: PTP + Apple Mobile Device + Apple USB Ethernet.AppleSynopsysOTGDevice

    Interface: PTP.AppleSynopsysOTGDevice

    Interface: AppleUSBMux.AppleSynopsysOTGDevice

    Interface: AppleUSBEthernet.AppleSynopsysOTGDevice::gated_reg isterFunction Register function USBAudioControl.AppleSynopsysOTGDevice::gated_regi sterFunction Register function USBAudioStreaming.IOAccessoryPortUSB::start.AppleS ynopsysOTGDevice::gated_registerFunction Register function IapOverUsbHid.virtual bool AppleUSBDeviceMux::start(IOService*) build: Aug 14 2009 13:39:52.init_waste.AppleSynopsysOTGDevice::gated_ registerFunction Register function AppleUSBMux.AppleSynopsysOTGDevice::gated_register Function Register function AppleUSBEthernet.AppleUSBEthernetDevice::start: Device MAC address = 0a:0b:ad:0b:ab:e0.AppleUSBEthernetDevice::start: Host MAC address = 00:25:bc:ad:0f:ea.AppleSynopsysOTGDevice::gated_re gisterFunction Register function PTP.AppleSynopsysOTGDevice::gated_registerFunction all functions registered- we are ready to start usb stack.AppleSynopsysOTGCore::setCurrentLimit: current:0, suspended:0.virtual IOReturn AppleUSBDeviceMux::setProperties(OSObject*) setting debug level to 7.AppleSynopsysOTGDevice::handleUSBReset.AppleSyno psysOTGCore::setCurrentLimit: current:100, suspended:0.AppleSynopsysOTGDevice::handleUSBReset .AppleSynopsysOTGCore::setCurrentLimit: current:100, suspended:0.AppleSynopsysOTGCore::setCurrentLimit: current:100, suspended:0.AppleSynopsysOTGCore::setCurrentLimit: current:500, suspended:0.close(caller = 0x3d98): remote port = 49152.AppleSynopsysOTGCore::setCurrentLimit: current:500, suspended:0.AppleUSBDeviceMux::handleConnectResult new session 0xc257e280 established 62078&lt;-lo0-&gt;49152 62078&lt;-usb-&gt;36096.AppleUSBDeviceMux::sessionUpcall socket is closed, session 0xc257e280 (62078&lt;-lo0-&gt;49152 62078&lt;-usb-&gt;36096).close(caller = 0x3d98): remote port = 49153.close(caller = 0x3d98): remote port = 49154.client protocol version 12.unable to open plist: No such file or directory.entering partition_nand_device.device is not a boot-from-NAND device.entering wait_for_storage_device.nand status = recover.AppleUSBDeviceMux::handleConnectResult new session 0xc257e300 established 62078&lt;-lo0-&gt;49153 62078&lt;-usb-&gt;36352.AppleUSBDeviceMux::handleConnectResul t new session 0xc257e100 established 62078&lt;-lo0-&gt;49154 62078&lt;-usb-&gt;36608.AppleUSBDeviceMux::sessionUpcall socket is closed, session 0xc257e300 (62078&lt;-lo0-&gt;49153 62078&lt;-usb-&gt;36352).AppleUSBDeviceMux::sessionUpcall socket is closed, session 0xc257e100 (62078&lt;-lo0-&gt;49154 62078&lt;-usb-&gt;36608).AppleUSBDeviceMux::handleConnectResu lt new session 0xc257e200 established 62078&lt;-lo0-&gt;49155 62078&lt;-usb-&gt;36864.nand status = recover.nand status = recover.nand status = recover.nand status = recover.[FTL:WRN] _FTLRestore OK!.[FTL:MSG] FTL_Open

    [OK].entering check_for_restore_log.executing /sbin/fsck_hfs.** /dev/rdisk0s1.** Checking Non-journaled HFS Plus volume..** Detected a case-sensitive catalog..** Checking Extents Overflow file..** Checking Catalog file..** Checking multi-linked files..** Checking Catalog hierarchy..** Checking volume bitmap..** Checking volume information..** The volume System appears to be OK..executing /sbin/mount_hfs.restore log does not exist.entering create_filesystem_partitions.encryptable property not found.creating unencrypted data partition.wipe entire partition: 0 (old = 500 new = 500).creating 1048576 byte wipe buffer.block size for /dev/disk0s1: 4096./sbin/newfs_hfs -s -v System /dev/disk0s1 .executing /sbin/newfs_hfs.Initialized /dev/rdisk0s1 as a 500 MB HFS Plus volume.creating 1048576 byte wipe buffer.block size for /dev/disk0s2: 4096./sbin/newfs_hfs -s -v Data /dev/disk0s2 .executing /sbin/newfs_hfs.Initialized /dev/rdisk0s2 as a 7244 MB HFS Plus volume.entering restore_images.executing /usr/sbin/asr.ASR STATUS: start.110.multicast-client.ASR: Waiting for connection attempt from server.void AppleUSBDeviceMux::handleConnectResult(BulkUSBMuxS ession*, errno_t) new session to port 12345 failed: 61.void AppleUSBDeviceMux::handleConnectResult(BulkUSBMuxS ession*, errno_t) new session to port 12345 failed: 61.ASR STATUS: setup.ASR: Validating target....ASR: done.ASR STATUS: metadata.ASR: Validating source....AppleUSBDeviceMux::handleConnectResult new session 0xc250a900 established 12345&lt;-lo0-&gt;49158 12345&lt;-usb-&gt;37632.ASR: done.ASR: Warning: the target volume may not be bootable.ASR: Erasing target device /dev/disk0s1....ASR: done.ASR: Retrieving scan information...done.ASR: Validating sizes....ASR: done.ASR STATUS: restore.ASR RESTORE PROGRESS: 2%.ASR RESTORE PROGRESS: 4%.ASR RESTORE PROGRESS: 98%.AppleUSBDeviceMux::sessionUpcall socket is closed, session 0xc250a900 (12345&lt;-lo0-&gt;49158 12345&lt;-usb-&gt;37632).ASR RESTORE PROGRESS: 100%.ASR: Copied 466383360 bytes in 155.37 seconds, 2931.45 KiB/s.ASR STATUS: verify.ASR VERIFY PROGRESS: 2%.ASR VERIFY PROGRESS: 4%.ASR VERIFY PROGRESS: 100%.ASR: Verified SHA-1 checksum 466383360 bytes in 59.87 seconds, 7607.95 KiB/s.ASR STATUS: finish.entering mount_filesystems.executing /sbin/fsck_hfs.** /dev/rdisk0s1.** Checking Non-journaled HFS Plus volume..** Detected a case-sensitive catalog..** Checking Extents Overflow file..** Checking Catalog file..** Checking multi-linked files..** Checking Catalog hierarchy..** Checking Extended Attributes file..** Checking volume bitmap..** Checking volume information..** The volume Northstar7C144.iPhoneOS appears to be OK..executing /sbin/mount_hfs.executing /sbin/fsck_hfs.** /dev/rdisk0s2.** Checking Non-journaled HFS Plus volume..** Detected a case-sensitive catalog..** Checking Extents Overflow file..** Checking Catalog file..** Checking multi-linked files..** Checking Catalog hierarchy..** Checking volume bitmap..** Checking volume information..** The volume Data appears to be OK..executing /sbin/mount_hfs.entering install_kernel_cache.entering get_hardware_platform.platform-name = s5l8900x.writing kernelcache to /mnt1/System/Library/Caches/com.apple.kernelcaches/kernelcache.s5l8900x.entering install_secure_vault_daemon.entering get_hardware_platform.platform-name = s5l8900x.linking /mnt1/usr/sbin/securekeyvaultd to /mnt1/usr/sbin/securekeyvaultd.s5l8900x.entering fixup_var.remove_path /mnt1/private/var.executing /bin/rm.creating directory (owner=0 mode=755) /mnt1/private/var.entering modify_fstab.entering clear_persistent_boot_args.executing /usr/sbin/nvram.nvram: Error setting variable - 'boot-args': (iokit/common) general error.error setting 'boot-args' to '': 1.attempting to dump restore log.writing log file: /mnt1/restore.log.</string>..<key>MsgType</key>..<string>StatusMsg</string>..<key>Status</key>..<integer>6</integer>.</dict>.</plist>.

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    Default Same thing

    Hello,

    I am having a similiar issue. Purchased an as-is iPhone 3G 8GB from a friend and have been working on getting it restored. In reading multiple forum posts, I haven't been able to get it resolved.

    The guy I bought it from knew it had been unlocked, but claims it just locked up one day. Itunes recognizes the device in recovery mode, it is blank screen and no display. I have tried to restore every version of FW from 3.0.1 to 3.1.3 yes I know it would then be unlockable but at this point I just would like a working phone!

    It seems to restore and verify the restore, but in the end Itunes reports Unknown Error occurred (6). Here are the last few lines of the update log

    ** The volume Data appears to be OK.
    executing /sbin/mount_hfs /dev/disk0s2 /mnt2
    entering install_kernel_cache
    entering get_hardware_platform
    platform-name = s5l8900x
    writing kernelcache to /mnt1/System/Library/Caches/com.apple.kernelcaches/kernelcache.s5l8900x
    entering install_secure_vault_daemon
    entering get_hardware_platform
    platform-name = s5l8900x
    linking /mnt1/usr/sbin/securekeyvaultd to /mnt1/usr/sbin/securekeyvaultd.s5l8900x
    entering fixup_var
    remove_path /mnt1/private/var
    executing /bin/rm -rf /mnt1/private/var
    creating directory (owner=0 mode=755) /mnt1/private/var
    entering modify_fstab
    entering unmount_filesystems
    entering clear_persistent_boot_args
    executing /usr/sbin/nvram boot-args=
    nvram: Error setting variable - 'boot-args': (iokit/common) general error
    error setting 'boot-args' to '': 1

    ==== end of device restore output ====
    2010-05-05 16:55:21.000 iTunes[518:10a93]: <Restore Device 0x183cd0d0>: Restore failed (result = 6)

    I have tried the usual recommendations, different USB port/cable, disable anti-virus. I have access to Windows and OSX so have tried both operating systems.

    I tried irecovery, but really don't know what settings to change etc. Here is the irecovery output

    ======================================
    ::
    :: iBSS for n82ap, Copyright 2009, Apple Inc.
    ::
    :: BUILD_TAG: iBoot-596.24
    ::
    :: BUILD_STYLE: RELEASE
    ::
    :: USB_SERIAL_NUMBER: CPID:8900 CPRV:30 CPFM:03 SCEP:05 BDID:04 ECID:000003293C113D76 IBFL:00
    ::
    =======================================

    Entering recovery mode, starting command prompt
    ] printenv
    build-style = "RELEASE"
    build-version = "iBoot-596.24"
    config_board = "n82ap"
    loadaddr = "0x9000000"
    boot-command = "fsboot"
    bootdelay = "0"
    auto-boot = "true"
    idle-off = "true"
    boot-device = "nand0"
    boot-partition = "0"
    boot-path = "/System/Library/Caches/com.apple.kernelcaches/kernelcache.s5l8900x"
    display-color-space = "RGB888"
    display-timing = "optC"
    framebuffer = "0xfd00000"
    secure-boot = "0x1"

    If anyone has any comments or suggestions I really appreciate it!


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    Quote Originally Posted by jimha View Post
    Hello,

    I am having a similiar issue. Purchased an as-is iPhone 3G 8GB from a friend and have been working on getting it restored. In reading multiple forum posts, I haven't been able to get it resolved.

    The guy I bought it from knew it had been unlocked, but claims it just locked up one day. Itunes recognizes the device in recovery mode, it is blank screen and no display. I have tried to restore every version of FW from 3.0.1 to 3.1.3 yes I know it would then be unlockable but at this point I just would like a working phone!

    It seems to restore and verify the restore, but in the end Itunes reports Unknown Error occurred (6). Here are the last few lines of the update log

    ** The volume Data appears to be OK.
    executing /sbin/mount_hfs /dev/disk0s2 /mnt2
    entering install_kernel_cache
    entering get_hardware_platform
    platform-name = s5l8900x
    writing kernelcache to /mnt1/System/Library/Caches/com.apple.kernelcaches/kernelcache.s5l8900x
    entering install_secure_vault_daemon
    entering get_hardware_platform
    platform-name = s5l8900x
    linking /mnt1/usr/sbin/securekeyvaultd to /mnt1/usr/sbin/securekeyvaultd.s5l8900x
    entering fixup_var
    remove_path /mnt1/private/var
    executing /bin/rm -rf /mnt1/private/var
    creating directory (owner=0 mode=755) /mnt1/private/var
    entering modify_fstab
    entering unmount_filesystems
    entering clear_persistent_boot_args
    executing /usr/sbin/nvram boot-args=
    nvram: Error setting variable - 'boot-args': (iokit/common) general error
    error setting 'boot-args' to '': 1

    ==== end of device restore output ====
    2010-05-05 16:55:21.000 iTunes[518:10a93]: <Restore Device 0x183cd0d0>: Restore failed (result = 6)

    I have tried the usual recommendations, different USB port/cable, disable anti-virus. I have access to Windows and OSX so have tried both operating systems.

    I tried irecovery, but really don't know what settings to change etc. Here is the irecovery output

    ======================================
    ::
    :: iBSS for n82ap, Copyright 2009, Apple Inc.
    ::
    :: BUILD_TAG: iBoot-596.24
    ::
    :: BUILD_STYLE: RELEASE
    ::
    :: USB_SERIAL_NUMBER: CPID:8900 CPRV:30 CPFM:03 SCEP:05 BDID:04 ECID:000003293C113D76 IBFL:00
    ::
    =======================================

    Entering recovery mode, starting command prompt
    ] printenv
    build-style = "RELEASE"
    build-version = "iBoot-596.24"
    config_board = "n82ap"
    loadaddr = "0x9000000"
    boot-command = "fsboot"
    bootdelay = "0"
    auto-boot = "true"
    idle-off = "true"
    boot-device = "nand0"
    boot-partition = "0"
    boot-path = "/System/Library/Caches/com.apple.kernelcaches/kernelcache.s5l8900x"
    display-color-space = "RGB888"
    display-timing = "optC"
    framebuffer = "0xfd00000"
    secure-boot = "0x1"

    If anyone has any comments or suggestions I really appreciate it!
    You have the same issue...
    "nvram: Error setting variable - 'boot-args': (iokit/common) general error
    error setting 'boot-args' to '': 1
    "

    The problem is that if boot-args can not be set 1 you will stay stuck in a kind of DFU-Mode.
    The only thing I can think of why this varaible can not be set is, that there is no permission to do so.
    I haven't found a way to enter a command mode...I was tryiing to install a Payload which also installs a Terminal and a BSD subsystem, but all this software requires at least recoverys mode and a differnt bootloader and not the "black screen" DFU-Mode... With the command line interface installed, it would have been possible to check what is wrong setting the variable boot-args...

    I am stuck now...

    Cheers,
    Thomas

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    Super Moderator Array Olethros's Avatar

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    Quote Originally Posted by tom1964 View Post
    The problem is that if boot-args can not be set 1 you will stay stuck in a kind of DFU-Mode.
    The only thing I can think of why this varaible can not be set is, that there is no permission to do so.
    I haven't found a way to enter a command mode...I was tryiing to install a Payload which also installs a Terminal and a BSD subsystem, but all this software requires at least recoverys mode and a differnt bootloader and not the "black screen" DFU-Mode... With the command line interface installed, it would have been possible to check what is wrong setting the variable boot-args...
    Idea #1
    Apple says error 6 can be fixed by http://support.apple.com/kb/TS3125

    Idea #2
    Modify the ramdisk to skip this step - see if that helps. I can try and provide details on how to do this.

    Idea #3
    You may need a patched iBSS or iBoot that allows commands normally restricted to Apple only. I doubt this will help though.

    Idea #4
    Get on IRC and ask for help there.
    Last edited by Olethros; 05-07-2010 at 12:26 PM.
    Please read the stickies & search forum before posting!
    How to report an iTunes restore/update fail in a useful manner
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    iPhone 8GB (3.1.3; Pwnagetool) AT&T Locked - Unlocked with bootneuter

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    Quote Originally Posted by Olethros View Post
    Idea #1
    Apple says error 6 can be fixed by iTunes for Windows: Troubleshooting security software issues

    Idea #2
    Modify the ramdisk to skip this step - see if that helps. I can try and provide details on how to do this.

    Idea #3
    You may need a patched iBSS or iBoot that allows commands normally restricted to Apple only. I doubt this will help though.

    Idea #4
    Get on IRC and ask for help there.
    Hi,
    Thanks for your ideas... ;-)

    Ad idea 1.)
    I am pretty sure that the issue is not PC related. It is definetly related to the iPhones Boot-Loader process. I suspect that the filesystem, where the variable "Boot-args" is stored (that why it is called NVM=Non volatile memory) is either corrupt or the system has no permission to write/change the "boot-args" variable.

    I think the boot-process is stuck with VROM->DFU since boot-args tells the bootlaoder to get into the DFU-Mode.

    But when I try Firmware restore out of DFU the bootchain would be as follows: VROM->DFU->WTF->iBoot->Kernel->Ramdisk->Restore Mode

    When I interupt the process at iBoot-Level I'll get the iBoot Version 596.24 (3.0 and 3.0.1) using iRecovery.

    Ad idea 2.)
    Would the Ramdisk-trick allow the boot-args Variable to be changed or getting access? Or even better would the Ramdisk-trick allow to boot out of the DFU mode? I am definetly interested to follow you recommendation.


    Thanks and cheers,
    Thomas

  9. #9
    Super Moderator Array Olethros's Avatar

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    Quote Originally Posted by tom1964 View Post
    I am pretty sure that the issue is not PC related. It is definetly related to the iPhones Boot-Loader process.
    Yes I understand all that - but Apple does specifically say that error 6 can be PC related - Update and restore alert messages on iPhone, iPad, and iPod touch

    Quote Originally Posted by tom1964 View Post
    Error 6: All of the steps in this article apply to resolve this issue. Following iTunes for Windows: Troubleshooting security software frequently resolves this error. There may be third-party software installed that modifies your default packet size in Windows by inserting a TcpWindowSize entry into your Registry. If your default packet size is set incorrectly it can cause this error. Contact the manufacturer of the software that installed the packet size modification for assistance.
    Quote Originally Posted by tom1964 View Post
    I suspect that the filesystem, where the variable "Boot-args" is stored (that why it is called NVM=Non volatile memory) is either corrupt or the system has no permission to write/change the "boot-args" variable.
    You could be right.

    Quote Originally Posted by tom1964 View Post
    Would the Ramdisk-trick allow the boot-args Variable to be changed or getting access? Or even better would the Ramdisk-trick allow to boot out of the DFU mode? I am definetly interested to follow you recommendation.
    It would be relatively simple to replace the boot-args binary with one that always returns true. That might allow the restore to finish.
    Please read the stickies & search forum before posting!
    How to report an iTunes restore/update fail in a useful manner
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    iPad 3G 64GB (4.3.3, Redsn0w) oldest SHSH 3.2.2
    iPhone 4 32GB (4.2.1, Redsn0w JB-monte) oldest SHSH 4.1
    iPhone 3GS 32GB (4.3.3; Pwnagetool) factory unlocked oldest SHSH 3.1
    iPhone 8GB (3.1.3; Pwnagetool) AT&T Locked - Unlocked with bootneuter

    -
    Did we solve your problem? Got a dollar or two spare ? Donate!

  10. #10
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    Quote Originally Posted by Olethros View Post
    It would be relatively simple to replace the boot-args binary with one that always returns true. That might allow the restore to finish.
    Great! I am listening to your advice...what needs to be done?


    Cheers,
    Thomas


 

 
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