I now have

linux-image-3.5.0-10-generic              3.5.0-10.10 
linux-image-extra-3.5.0-10-generic        3.5.0-10.10 

and I no longer have the problem I originally reported.  That is, now
the "intel" driver is used, my Samsung SyncMaster 223BW monitor is
detected and EDID information is obtained as seen in Xorg.0.log.

[...]
[    25.676] (II) intel(0): EDID for output VGA1
[    25.708] (II) intel(0): EDID for output HDMI1
[    25.756] (II) intel(0): EDID for output DP1
[    25.772] (II) intel(0): EDID for output HDMI2
[    26.076] (II) intel(0): EDID for output HDMI3
[    26.076] (II) intel(0): Manufacturer: SAM  Model: 30d  Serial#: 1296380466
[    26.076] (II) intel(0): Year: 2008  Week: 14
[    26.076] (II) intel(0): EDID Version: 1.3
[    26.076] (II) intel(0): Digital Display Input
[    26.076] (II) intel(0): Max Image Size [cm]: horiz.: 47  vert.: 30
[    26.076] (II) intel(0): Gamma: 2.20
[    26.076] (II) intel(0): DPMS capabilities: Off
[    26.076] (II) intel(0): Supported color encodings: RGB 4:4:4 YCrCb 4:4:4
[    26.076] (II) intel(0): First detailed timing is preferred mode
[    26.076] (II) intel(0): redX: 0.644 redY: 0.333   greenX: 0.286 greenY: 
0.603
[    26.076] (II) intel(0): blueX: 0.152 blueY: 0.079   whiteX: 0.313 whiteY: 
0.329
[    26.076] (II) intel(0): Supported established timings:
[    26.076] (II) intel(0): 720x400@70Hz
[    26.076] (II) intel(0): 640x480@60Hz
[    26.076] (II) intel(0): 640x480@67Hz
[    26.076] (II) intel(0): 640x480@72Hz
[    26.076] (II) intel(0): 640x480@75Hz
[    26.076] (II) intel(0): 800x600@56Hz
[    26.076] (II) intel(0): 800x600@60Hz
[    26.076] (II) intel(0): 800x600@72Hz
[    26.076] (II) intel(0): 800x600@75Hz
[    26.076] (II) intel(0): 832x624@75Hz
[    26.076] (II) intel(0): 1024x768@60Hz
[    26.076] (II) intel(0): 1024x768@70Hz
[    26.076] (II) intel(0): 1024x768@75Hz
[    26.076] (II) intel(0): 1280x1024@75Hz
[    26.076] (II) intel(0): 1152x864@75Hz
[    26.076] (II) intel(0): Manufacturer's mask: 0
[    26.076] (II) intel(0): Supported standard timings:
[    26.076] (II) intel(0): #0: hsize: 1680  vsize 1050  refresh: 60  vid: 179
[    26.076] (II) intel(0): #1: hsize: 1280  vsize 1024  refresh: 60  vid: 32897
[    26.076] (II) intel(0): #2: hsize: 1280  vsize 960  refresh: 60  vid: 16513
[    26.076] (II) intel(0): #3: hsize: 1152  vsize 864  refresh: 75  vid: 20337
[    26.076] (II) intel(0): Supported detailed timing:
[    26.076] (II) intel(0): clock: 119.0 MHz   Image Size:  474 x 296 mm
[    26.076] (II) intel(0): h_active: 1680  h_sync: 1728  h_sync_end 1760 
h_blank_end 1840 h_border: 0
[    26.076] (II) intel(0): v_active: 1050  v_sync: 1053  v_sync_end 1059 
v_blanking: 1080 v_border: 0
[    26.076] (II) intel(0): Ranges: V min: 56 V max: 75 Hz, H min: 30 H max: 81 
kHz, PixClock max 145 MHz
[    26.076] (II) intel(0): Monitor name: SyncMaster
[    26.076] (II) intel(0): Serial No: HS3Q327803
[    26.076] (II) intel(0): EDID (in hex):
[    26.076] (II) intel(0):     00ffffffffffff004c2d0d033232454d
[    26.076] (II) intel(0):     0e120103802f1e782ad515a455499a27
[...]

Unfortunately I still get BUG messages when I resize the display on the
SyncMaster.  I will file a new report about that.

** Changed in: xorg-server (Ubuntu)
       Status: Incomplete => Fix Released

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https://bugs.launchpad.net/bugs/1028919

Title:
  External monitor Samsung SyncMaster 223BW not detected

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