Serial.flush() hangs when using 2Mbps

[longapalooza]

When using a buad rate of 2Mbps, Serial.flush() hangs. This issue is fully discussed and solved here at http://forum.arduino.cc/index.php?topic=504753.0. The proposed solution is to switch lines 221 and 222 shown here https://github.com/arduino/Arduino/blob/master/hardware/arduino/avr/cores/arduino/HardwareSerial.cpp#L221-L222.

[matthijskooijman]

I think this is a known issue which was also discussed at #3745 (though that was originally about another problem). The fix you propose will work, but introduces other problems. Could see if the PR at #3865 fixes the problem for you? I think it should.

[Coding-Badly]

The fix you propose will work, but introduces other problems.

Such as?

[matthijskooijman]

See (the last part of) https://github.com/arduino/Arduino/issues/3745#issuecomment-142244433

[johnholman]

Yes, this seems to be a duplicate of second issue raised in #3745 and fixed by #6855

[sandeepmistry]

I believe this is closed by #6855.

Please let us know if the issue still occurs and we can re-open.