diff --git a/pm3py/lf/capture.py b/pm3py/lf/capture.py
index 5e8c651..566905a 100644
--- a/pm3py/lf/capture.py
+++ b/pm3py/lf/capture.py
@@ -120,6 +120,12 @@ def identify_lf(device, emit=None) -> dict | None:
     if device is None:
         return None
 
+    # Force the device debug level to NONE for the duration: on debug-heavy firmware a raised
+    # g_dbglevel makes LF acquisition emit Dbprintf frames over USB, which interleave with the
+    # sample download and desync it. This is the device-side knob (not the C client's g_debugMode
+    # spam), and pm3py's own reads are what matter here.
+    _try(lambda: device.hw.dbg(0), None)
+
     config = read_config(device)           # T55xx? -> chip + emulation
     emitted = read_emitted(device)         # what's on the air -> EM4100 ID (etc.)