Very dirty fix
If you ever get this, be aware that it's a known bug, and it's because of the "i" in:[mihamina@dell-f17 ~]$ xrandr -q
Screen 0: minimum 320 x 200, current 2390 x 768, maximum 8192 x 8192
LVDS1 connected 1366x768+0+0 (normal left inverted right x axis y axis) 344mm x 194mm
1366x768 60.1*+
1024x768 60.0
800x600 60.3 56.2
640x480 59.9
VGA1 connected 1024x768+1366+0 (normal left inverted right x axis y axis) 0mm x 0mm
800x600 60.3 + 85.1 72.2 75.0 56.2
1280x1024 60.0
1280x960 60.0
1280x800 74.9 59.8
1152x864 75.0 70.0
1280x768 74.9 59.9
1024x768 85.0* 75.1 70.1 60.0
1024x768i 43.5 <========== THERE!!
1024x576 60.0
848x480 60.0
640x480 85.0 72.8 75.0 60.0
720x400 85.0 70.1
640x400 85.1
640x350 85.1
HDMI1 disconnected (normal left inverted right x axis y axis)
DP1 disconnected (normal left inverted right x axis y axis)Upstream have to fix it, but waiting for that, edit xrandr.py line 150
for d in details:
# o.modes.append(Size(int(a) for a in d.strip().split(" ")[0].split("x")))
o.modes.append(Size(a for a in d.strip().split(" ")[0].split("x")))
This will make your arandr work again. A package update will overwrtite this.
A better than worst fix
In my sample repository, you can find the last version of my (still dirty) fix: http://goo.gl/fBAoY