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  1. #91
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    I'm not at my usual PC so cannon check the firmware myself. If you can use a hex editor then open the firmware and search for the commands rrgn (copy), xrgn (overwrite) and ergn (erase). Search also as (for example) r.r.g.n where "." is a wildcard character. If the commands are in the firmware then it's maybe possible to use ergn to erase the detail map. The problem I foresee is that SD text commands need to be initiated by Ldr.bin [boot.bin] in 'normal' Garmin-OS devices and I have no idea how to extract the appropriate BIN file from an *.update or *rgn Linux firmware file.

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  3. #92
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    I know how to use Hex Editor, unfortunately ergn is found only once,
    in a position where it makes no sense to me (at 00886a7e0e).

  4. #93
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    You can download from here:

    Code:
    Please Login or Register to see the links
    Coded external link. No direct Garmin links are allowed under [Only registered and activated users can see links. ].

  5. #94
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    Default Warning, unqualified comment below ;)

    Quote Originally Posted by Alfiogigio View Post
    I know how to use Hex Editor, unfortunately ergn is found only once,
    in a position where it makes no sense to me (at 00886a7e0e).
    That doesn't sound promising. You could also try to edit the firmware yourself if you can find map file extensions mentioned in it. Changing any instance of ".IMG" to say ".XMG" does work with Garmin proprietary-OS firmware as a 'cure' to prevent loading maps. I can't say such a thing will work with Linux based-OS firmware and it may even 'brick' the device more seriously so all at your risk. Of course if that does work in the same way as 'normal' firmware, once the edited RGN is flashed in preboot no maps will be loaded on attempted boot and Mass Storage Mode might then be available to the device. Someone with Linux software experience might read this and comment hopefully, as that's only a stab in the dark guess.
    Dunno

  6. #95
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    .IMG and .XMG are nowhere to be found in firmware.

    But problem are solved, by keep hard reset many many times, until device finally start up properly.
    Now I found, that there was a bad (locked) IMG file on the device

  7. #96
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    Nice find! Every now and then, especially with older devices, a healthy one will fail to load maps on start up and present you wilh a screen without roads and showing only the vehicle icon. It might be only one in a hundred or many more boots when it happens and of course in an otherwise healthy device the next boot, whether done as a reset or normal boot, usually succeeds fully. I have a nuvi 765 US that's particularly prone to it. Now that little curious quirk can be used to advantage with a boot-looping device which will boot to 'Loading Maps' and then restart over and over, indicating a corrupt IMG file. By leaving it charging turned on for an extended period, maybe overnight or a day or even more, eventually it will fluke a boot without loading any .img files and you find the device fully booted but the Map screen showing no roads, only a lonely-looking vehicle icon. Then provided you don't let it reboot it will have MSM access and the offending map, which is nearly always a detail map, can be removed.

    BTW, I didn't mean to look for .xmg too. I meant look for any instance of .img and change it to .xmg or it could be anything, .zzz or whatever provided it's not a used extension. It's just easier to substitute 'x' for the first letter that's all. It's really not surprising that the file extensions aren't in the Linux firmware but I've also checked multiple ways and you're right of course. If they were there us common folk would have been making cure fw for Linux devices years ago. Searching either as Unicode Latin or with a wildcard "." (i.e. ".I.M.G.") works with Garmin proprietary-OS firmwares and finds multiple references of ". I M G" and other common extensions which can cause 'bricking', such as gpi, gpx, vpm etc. Nobody bothers with that tedious method since the brilliant kunix came up with his Cure3 and QuickCure apps to simplify/automate making cures. Some more info here: [Only registered and activated users can see links. ]. I know for sure it can be done to make Linux cure fw but the guys who can do it just don't seem to post here anymore.

  8. #97
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    Pl. Help

    1. Bricked Nuvi 2597 HWID 1582 S/W ver 440
    2. Accidentally formated the internal memory while intending to format the SD card
    3. Device now just boots into the Garmin screen, no filesyetem access to internl devide memory
    4. No, PC does not see the device anymore
    5. Downloaded GCD files, ver 440 through 550 from [Only registered and activated users can see links. ]
    Ran GarminCure3 and created cure file with ver 440
    Applied using updater and got message "updating successful"
    The device is NOT detected by the PC. Garmin Express also doesn't see the device either
    6. Yes, Garmin driver's are installed (as part of Garmin express)
    7. HWID is 1582 (from original GarminDevice.xml)
    8. Yes, tried that (Pl. see #5 above)
    9. Yes, In preboot mode I can see System (and loading when applying the update using Updater). The screen is stuck at the GARMIN Logo
    10. Sorry No, my bad, No NV backup
    11. Waiting for your response

    Thank you


    Update
    After reapplying the GarminCyre3 on the manually modified RGN (converted from 440_GCD with hexedits), the PC can now see the Garmin volume (Win 10). The drive is mounted as:
    GARMIN (E)
    System Volume Information

    Garmin Express however can't see the device. Looks like one or more files/folders need to b erestored. Unfortunately, I have none backed up
    Last edited by sbihue; 27th August 2018 at 07:30 AM.

  9. #98
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    @sbihue,

    Sorry to hear you bricked your Garmin.

    But I have one question and I read this all the time about user's wanting to format their SD card and do just what you did.

    Why didn't you just take the SD card out and format it on your PC or laptop.

    I always remove my SD card to change maps or all POI's or replace it.
    I keep 3 or 4 SD cards with different maps on them so when I am traveling I just pop in that countries map and drive around with it.

    I also have one SD card with all of Europe on it.

    But never format the SD card while it is still in the Garmin Unit.

    But I hope you can unbrick the Garmin.

  10. #99
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    Quote Originally Posted by sbihue View Post
    Pl. Help

    1. Bricked Nuvi 2597 HWID 1582 S/W ver 440
    2. Accidentally formated the internal memory while intending to format the SD card
    3. Device now just boots into the Garmin screen, no filesyetem access to internl devide memory
    4. No, PC does not see the device anymore
    5. Downloaded GCD files, ver 440 through 550 from [Only registered and activated users can see links. ]
    Ran GarminCure3 and created cure file with ver 440
    Applied using updater and got message "updating successful"
    The device is NOT detected by the PC. Garmin Express also doesn't see the device either
    6. Yes, Garmin driver's are installed (as part of Garmin express)
    7. HWID is 1582 (from original GarminDevice.xml)
    8. Yes, tried that (Pl. see #5 above)
    9. Yes, In preboot mode I can see System (and loading when applying the update using Updater). The screen is stuck at the GARMIN Logo
    10. Sorry No, my bad, No NV backup
    11. Waiting for your response

    Thank you


    Update
    After reapplying the GarminCyre3 on the manually modified RGN (converted from 440_GCD with hexedits), the PC can now see the Garmin volume (Win 10). The drive is mounted as:
    GARMIN (E)
    System Volume Information

    Garmin Express however can't see the device. Looks like one or more files/folders need to b erestored. Unfortunately, I have none backed up
    Firstly you must understand that cure firmware cannot boot. It is designed that way so that Mass Storage Mode can be attained [you've now got that], once you have MSM it's possible to either (i) remove any corrupt files from the internal memory [you have nothing loaded], or (ii) allow a correct re-formatting to be done using [Only registered and activated users can see links. ]. Formatting with Windows built-in tool or even worse in FAT32 using Mac OS/Linux often isn't successful for Garmin devices. It seems you have an old file system backup so you can load that after you format with RMPrepUSB and then restore your backup and finally load original firmware after which it should boot fully. Remove any gupdate.gcd file from your backup before you restore. If it boots correctly GarminExpress will detect it properly and you can update old files and maps as necessary.

    Post again if you have furthers difficulty after following the above steps.

  11. #100
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    Thanks Butters. Unfortunately, No, I don't have any backup of either the NV or the FileSystem. All I have is the original GarminDevice.xml

    Update:

    Pl. Disregard. I was able to restore my device and its up & running now. The Steps used to restore the 2597 on Windows 10 Pro, are as follows:

    Get the device in MSM mode first
    1. Download any GCD file. I had v440 and v550 (latest) for my device (HWID 1582)
    2. Used GarminCure3 to create a cure FW (RGN) file with v440
    3. Applied it in pre-boot mode
    4. Got MSM access

    Prepare the internal FS
    5. Once the device was visible to the Windows OS, used RMPrepUSB tool to reformat and prepare the device FS
    6. Used RGN tool on v550 GCD to flash the original (NOT Cure) file in pre-boot mode. This restored the internal data structures minus the content

    Get content from Garmin
    7. Used Garmin Connect to update the Device with all pending files (maps, other files). had to do this a few times as Garmin Connect would not identify the device and crash when starting the update

    Backup the NVRAM & FS
    8. Made a backup of the device's NVRAM and saved it along with all the files (bins/gcd's etc) used in recovery in a separate folder just in-case

    ReFlash Patched Firmware (optional)
    9. Once all content and dependencies had been downloaded, used Firmware patch with original v550 GCD file to allow access to unlocked maps
    Last edited by sbihue; 28th August 2018 at 01:28 AM.

 

 

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