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  • Case ID: 343020
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DFU OTA suddenly fails on "non secure" bootloaders but works on "secure" bootloaders.

Lennart Andersson

Suddenly DFU OTA fails most of the time while trying to update units with code & "not secure" bootloader that has been working for years. The FW upload stops at 2% to 8% but if i restart my phone sometimes it reaches 15% and on happy days I can update the unit after rebooting the phone.

With the same DFU app DFU update works well with another unit with "secure" bootloader.

I am NOT trying to update a unit with "not secure" bootloader with code made for units with "secure bootloader" and vice versa.

What can suddenly be the problem?

Phone: Samsung Galaxy S21 Ultra 5G

Android version: 14

DFU app version: 2.9.0 (build 24123065)

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  • 0

    Do you have any suggestion om how to solve this problem? Does the log files I have sent give any clue to what the problem is?

  • 0 in reply to Lennart Andersson

    Hello,

    Could you click the DFU button which appears on the top bar when you connect to your device, select the firmware file and try DFU from there? If you did that, it may be that a second tab opens for the device in bootloader mode (increamented MAC address). Please switch to the first tab and share the log from that one, not the new one. It should have some logs starting with [DFU].

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  • 0 in reply to Lennart Andersson

    Hello,

    Could you click the DFU button which appears on the top bar when you connect to your device, select the firmware file and try DFU from there? If you did that, it may be that a second tab opens for the device in bootloader mode (increamented MAC address). Please switch to the first tab and share the log from that one, not the new one. It should have some logs starting with [DFU].

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