[doldi]

@herrmeier01 , many thanks for your support.
here little info:
I am shure, that 1080p50 was working in earlier builds.

pi3:~ # tvservice -s
state 0x12000a [HDMI CEA (16) RGB lim 16:9], 1920x1080 @ 60.00Hz, progressive

pi3:~ # tvservice --modes=CEA
Group CEA has 15 modes:
...btw : HDMI:EDID CEA mode (16) 1920x1080p @ 60 Hz with pixel clock 148 MHz has a score of 273832

pi3:~ # edidparser edid.dat
HDMI:EDID best score mode is now CEA (31) 1920x1080p @ 50 Hz with pixel clock 148 MHz(score 5336040)

pi3:~ # tvservice -s
state 0x12000a [HDMI CEA (31) RGB lim 16:9], 1920x1080 @ 50.00Hz, progressive