I already use a modeline (because I won't get a correct output without a modeline before 2.2.0).
Modeline "1680x1050_60.00" 146.25 1680 1784 1960 2240 1050 1053 1059 1089 -hsync +vsync
This modeline works fine with 2.1.1, so I think that it should be no problem with 2.2.0, too.
I already use a modeline (because I won't get a correct output without a modeline before 2.2.0).
Modeline "1680x1050_60.00" 146.25 1680 1784 1960 2240 1050 1053 1059 1089 -hsync +vsync
This modeline works fine with 2.1.1, so I think that it should be no problem with 2.2.0, too.