Can't use 2560 x 1080 (21:9) resolution fedora 25

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I've just installed fedora on my laptop and it won't let me choose a resolution above 1920x1080. I've tried xrandr (using both wayland and xorg) but still can't change it.

All works on windows, using HDMI. Laptop has fedora 25, i7-3632QM, AMD 7730. It also works on Ubuntu automatically.

$ xrandr --newmode "2560x1080_60.00"  230.00  2560 2720 2992 3424  1080 1083 1093 1120 -hsync +vsync
$ xrandr --addmode XWAYLAND1 2560x1080_60.00
$ xrandr --output XWAYLAND1 --mode 2560x1080_60.00

$ xrandr -q
Screen 0: minimum 320 x 200, current 1920 x 2160, maximum 8192 x 8192
XWAYLAND1 connected 1920x1080+0+1080 340mm x 190mm
   1920x1080     59.96*+
XWAYLAND3 connected 1920x1080+0+0 800mm x 340mm
   1920x1080     59.88*+

I think there might be a detection problem, in the display settings in says ' Goldstar Company Ltd 34" ' but it is an LG 29".

From Xorg.1.log:

intel(0): Not using mode "2560x1080_60.00" (exceeds panel dimensions)
[ 110.333] (II) intel(0): Supported detailed timing: [ 110.333] (II) intel(0): clock: 185.6 MHz Image Size: 798 x 334 mm
[ 110.333] (II) intel(0): h_active: 2560 h_sync: 2624 h_sync_end 2688 h_blank_end 2784 h_border: 0
[ 110.333] (II) intel(0): v_active: 1080 v_sync: 1083 v_sync_end 1093 v_blanking: 1111 v_border: 0

Is the above telling me that the supported resolution is 2560x1080? and that it is also exceeding panel dimensions??

Is it possible that this is a graphics driver problem?