Description of problem:
i just tried to hook up a 42" fullhd lcd via displayport -> hdmi adapter and it is detected as dvi1 by xrandr: http://fpaste.org/nxMQ/. max resolution probed was 1280x720 and only 7". in reality this is a fullhd lcd with 42" inch. 1920 x 1080 max resolution.

the hardware is a lenovo x301 with gma 4500 hd but i got the same results with an ati card.

xrandr
Screen 0: minimum 320 x 200, current 1440 x 900, maximum 8192 x 8192
LVDS1 connected 1440x900+0+0 (normal left inverted right x axis y axis) 287mm x 180mm
   1440x900       60.0*+   50.0  
   1024x768       60.0  
   800x600        60.3     56.2  
   640x480        59.9  
VGA1 disconnected (normal left inverted right x axis y axis)
DVI1 connected 1280x720+1440+0 (normal left inverted right x axis y axis) 16mm x 9mm
   1280x720       50.0*    60.0  
   720x576        50.0  
   720x480        59.9  
   640x480        60.0  
DP1 disconnected (normal left inverted right x axis y axis)
DP2 disconnected (normal left inverted right x axis y axis)


xorg.log:
II) intel(0): EDID for output DVI1
(II) intel(0): Manufacturer: OEM  Model: 3700  Serial#: 0
(II) intel(0): Year: 2006  Week: 37
(II) intel(0): EDID Version: 1.3
(II) intel(0): Digital Display Input
(II) intel(0): Max Image Size [cm]: horiz.: 2  vert.: 1
(II) intel(0): Gamma: 2.20
(II) intel(0): No DPMS capabilities specified
(II) intel(0): Supported color encodings: RGB 4:4:4 YCrCb 4:4:4 
(II) intel(0): First detailed timing is preferred mode
(II) intel(0): redX: 0.651 redY: 0.331   greenX: 0.274 greenY: 0.595
(II) intel(0): blueX: 0.142 blueY: 0.067   whiteX: 0.285 whiteY: 0.293
(II) intel(0): Supported established timings:
(II) intel(0): 640x480@60Hz
(II) intel(0): Manufacturer's mask: 0
(II) intel(0): Supported detailed timing:
(II) intel(0): clock: 74.2 MHz   Image Size:  16 x 9 mm
(II) intel(0): h_active: 1920  h_sync: 2008  h_sync_end 2052 h_blank_end 2200 h_border: 0
(II) intel(0): v_active: 540  v_sync: 542  v_sync_end 547 v_blanking: 562 v_border: 0
(II) intel(0): Supported detailed timing:
(II) intel(0): clock: 74.2 MHz   Image Size:  16 x 9 mm
(II) intel(0): h_active: 1280  h_sync: 1390  h_sync_end 1430 h_blank_end 1650 h_border: 0
(II) intel(0): v_active: 720  v_sync: 725  v_sync_end 730 v_blanking: 750 v_border: 0
(II) intel(0): Monitor name: 42'' TFT-TV
(II) intel(0): Ranges: V min: 49 V max: 61 Hz, H min: 15 H max: 46 kHz, PixClock max 80 MHz
(II) intel(0): Number of EDID sections to follow: 1
(II) intel(0): EDID (in hex):
(II) intel(0): 	00ffffffffffff003cad003700000000
(II) intel(0): 	25100103801009780af550a654469824
(II) intel(0): 	11494b20000001010101010101010101
(II) intel(0): 	010101010101011d8018711c1620582c
(II) intel(0): 	250010090000009e011d007251d01e20
(II) intel(0): 	6e28550010090000001e000000fc0034
(II) intel(0): 	322727205446542d54560a20000000fd
(II) intel(0): 	00313d0f2e08000a2020202020200158
(II) intel(0): Printing probed modes for output DVI1
(II) intel(0): Modeline "1280x720"x50.0   74.25  1280 1720 1760 1980  720 725 730 750 +hsync +vsync (37.5 kHz)
(II) intel(0): Modeline "1280x720"x60.0   74.25  1280 1390 1430 1650  720 725 730 750 +hsync +vsync (45.0 kHz)
(II) intel(0): Modeline "720x576"x50.0   27.00  720 732 796 864  576 581 586 625 -hsync -vsync (31.2 kHz)
(II) intel(0): Modeline "720x480"x59.9   27.00  720 736 798 858  480 489 495 525 -hsync -vsync (31.5 kHz)
(II) intel(0): Modeline "640x480"x60.0   25.20  640 656 752 800  480 490 492 525 -hsync -vsync (31.5 kHz)
(II) intel(0): EDID for output DP1
(II) intel(0): EDID for output DP2



Version-Release number of selected component (if applicable):
xorg 1.7.1

How reproducible:
always