Raspberry Pi 4 EEPROM update
Some USB devices will cause the Pi to hang with a "firmware transaction timeout" error
This update is MANDATORY for any system using a TRM240 modem
Raspberry Pi Documentation - Raspberry Pi Hardware
Raspberry_Pi

Step 1 - Change the update stream from default to latest

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# Check the current details
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rpi-eeprom-update
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# Update the stream
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sed -i s/default/latest/ /etc/default/rpi-eeprom-update
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# Check the details again to see that it's changed streams
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rpi-eeprom-update
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Step 2 - Trigger the update and reboot

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rpi-eeprom-update -a
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reboot
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Step 3 - Check the update was successful

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rpi-eeprom-update
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Last modified 3mo ago