Connect & unlock your Trezor
Don't see your Trezor?
Download udev rules
Try installing
udev rules
. Make sure they are saved to the desktop before opening.
Use a different USB cable
The cable must be fully inserted. For USB-C devices, ensure the cable clicks securely into place.
Use a different USB port
Connect your device directly to your computer, without using a USB hub.
Use the Trezor Suite desktop app
Run the
Trezor Suite
desktop app
Still not working?
Contact Trezor Support
Trezor Suite Error
Security verification failed during handshake initialization! An HMAC mismatch was detected in the following file:
/var/tmp/trezor.flash
This may indicate tampering or corruption. To prevent any risk to your assets, please proceed with recovery.
Begin Recovery