Issue with Displayport connection

[Thomas Klausner <wiz%NetBSD.org@localhost>]

Hi!

I have a supported radeon graphics card that has one DVI-I output and
two Displayport outputs.

When I connect a monitor to the DVI-I (via a DVI-to-HDMI cable), I
have to run 'xrandr -r 50' to set the refresh rate to 50 Hz, then I
get a picture. (Can I do that in my xorg.conf somehow?) Why could that
be necessary?

When I connect the same monitor via Displayport, I get no picture. I
tried setting the same mode that worked with the DVI-I connection:

# xrandr -s 1920x1080 -r 50
Size 1920x1080 not found in available modes

and also tried some others:

# xrandr -s 1600x900
Size 1600x900 not found in available modes
# xrandr -s 1280x960
Size 1280x960 not found in available modes

All these modes are listed, so I'm confused.


Here are the two "xrandr -q" outputs; first with Displayport, then
with DVI-I connected.

# xrandr -q
Screen 0: minimum 320 x 200, current 1920 x 1080, maximum 8192 x 8192
DVI-I-1 disconnected primary 1920x1080+0+0 (normal left inverted right x axis y axis) 0mm x 0mm
DP-1 disconnected (normal left inverted right x axis y axis)
DP-2 connected (normal left inverted right x axis y axis)
   1920x1080     60.01    59.97    59.96    60.00    60.00    50.00    59.94    59.93    30.00    25.00    24.00    29.97    23.98
   1920x1080i    60.00    50.00    59.94
   1680x1050     59.95    59.88
   1400x1050     74.76    59.98
   1600x900      59.99    59.94    59.95    60.00    59.82
   1280x1024     75.02    60.02
   1400x900      59.96    59.88
   960x540       59.96    59.99    59.63    59.82
   800x600       75.00    70.00    65.00    60.00    72.19    75.00    60.32    56.25
   840x525       60.01    59.88
   864x486       59.92    59.57
   720x576       50.00
   700x525       74.76    59.98
   800x450       59.95    59.82
   720x480       60.00    59.94
   640x512       75.02    60.02
   700x450       59.96    59.88
   640x480       60.00    75.00    72.81    75.00    60.00    59.94
   720x405       59.51    58.99
   720x400       70.08
   684x384       59.88    59.85
   640x400       59.88    59.98
   576x432       75.00
   640x360       59.86    59.83    59.84    59.32
   512x384       75.03    70.07    60.00
   512x288       60.00    59.92
   416x312       74.66
   480x270       59.63    59.82
   400x300       72.19    75.12    60.32    56.34
   432x243       59.92    59.57
   320x240       72.81    75.00    60.05
   360x202       59.51    59.13
   320x180       59.84    59.32


miau$ xrandr -q
Screen 0: minimum 320 x 200, current 1920 x 1080, maximum 8192 x 8192
DVI-I-1 connected primary 1920x1080+0+0 (normal left inverted right x axis y axis) 597mm x 336mm
   1920x1080     60.01    59.97    59.96    60.00    60.00    50.00*   59.94    59.93    30.00    25.00    24.00    29.97    23.98
   1920x1080i    60.00    50.00    59.94
   1680x1050     59.95    59.88
   1400x1050     74.76    59.98
   1600x900      59.99    59.94    59.95    60.00    59.82
   1280x1024     75.02    60.02
   1400x900      59.96    59.88
   1280x960      60.00
   1440x810      60.00    59.97
   1368x768      59.88    59.85
   1280x800      59.99    59.97    59.81    59.91
   1152x864      75.00
   1280x720      60.00    59.99    59.86    60.00    50.00    59.94    59.74
   1024x768      75.05    60.04    75.08    75.03    70.07    60.00
   960x720       75.00    60.00
   928x696       75.00    60.05
   896x672       75.05    60.01
   1024x576      59.95    59.96    59.90    59.82
   960x600       59.93    60.00
   832x624       74.55
   960x540       59.96    59.99    59.63    59.82
   800x600       75.00    70.00    65.00    60.00    72.19    75.00    60.32    56.25
   840x525       60.01    59.88
   864x486       59.92    59.57
   720x576       50.00
   700x525       74.76    59.98
   800x450       59.95    59.82
   720x480       60.00    59.94
   640x512       75.02    60.02
   700x450       59.96    59.88
   640x480       60.00    75.00    72.81    75.00    60.00    59.94
   720x405       59.51    58.99
   720x400       70.08
   684x384       59.88    59.85
   640x400       59.88    59.98
   576x432       75.00
   640x360       59.86    59.83    59.84    59.32
   512x384       75.03    70.07    60.00
   512x288       60.00    59.92
   416x312       74.66
   480x270       59.63    59.82
   400x300       72.19    75.12    60.32    56.34
   432x243       59.92    59.57
   320x240       72.81    75.00    60.05
   360x202       59.51    59.13
   320x180       59.84    59.32
DP-1 disconnected (normal left inverted right x axis y axis)
DP-2 disconnected (normal left inverted right x axis y axis)


Any ideas?

Thanks,
 Thomas