On Wed, 6 Mar 2019, Andreas Schwab wrote: > Trying to log in on the serial console causes the system to freeze. The > last message is: > > [ 115.597858] sifive-serial 10010000.serial: BRKINT/PARMRK flag not supported Have not seen that problem. If you're still seeing this, could you follow up with me off-list so we can synchronize configurations, both with the kernel and with non-kernel boot & M-mode components? - Paul