from the setserial output: "Flags: spd_normal skip_test"; skip_test is usually set when there is a fake 16550 present; try without this flag, and see if the uart gets tested ok.
from the setserial output: "Flags: spd_normal skip_test"; skip_test is usually set when there is a fake 16550 present; try without this flag, and see if the uart gets tested ok.