I think we can close this bug as it appears to be due to a hardware
fault in the monitor that is preventing the EDID information arriving at
the VGA port.

Only this monitor has this problem on this computer. I have tested
Jaunty Alpha-4 and the problem persists if the M993c is the only monitor
present.

It appears that if an EDID monitor is not found, the driver assumes an
old pre-EDID CRT is attached and limits the resolution to 800x600.

If I plug a different monitor into the 1st (alone) or 2nd (with the CRT
on the 1st) DE-15F on the video card, its EDID is read and is used to
set the maximum resolution (1680x1050 in this case).

Excerpts from Xorg.log.0:

CRT only on port #1:

[    0.701565] (II) Loading sub module "i2c"
[    0.701606] (II) LoadModule: "i2c"
[    0.701694] (II) Module "i2c" already built-in
[    0.701727] (II) Loading sub module "ddc"
[    0.701754] (II) LoadModule: "ddc"
[    0.701815] (II) Module "ddc" already built-in
[    0.762319] (II) NV(0): I2C bus "DDC" initialized.
[    0.762498] (II) NV(0): Probing for analog device on output A...
[    0.767621] (--) NV(0):   ...found one
[    0.767785] (II) NV(0): Probing for analog device on output B...
[    0.777372] (--) NV(0):   ...can't find one
[    0.777558] (II) NV(0): Probing for EDID on I2C bus A...
[    0.777697] (II) NV(0): I2C device "DDC:E-EDID segment register" registered 
at address 0x60.
[    0.777744] (II) NV(0): I2C device "DDC:ddc2" registered at address 0xA0.
[    1.395576] (II) NV(0):   ... none found
[    1.395729] (II) NV(0): Probing for EDID on I2C bus B...
[    1.398989] (II) NV(0):   ... none found
[    1.399029] (--) NV(0): CRTC 0 appears to have a CRT attached
[    1.399069] (II) NV(0): Using CRT on CRTC 0
[    1.399107] (--) NV(0): VideoRAM: 131072 kBytes
[    1.399161] (==) NV(0): Using gamma correction (1.0, 1.0, 1.0)
[    1.399312] (II) NV(0): <default monitor>: Using default hsync range of 
31.50-37.90 
kHz
[    1.399376] (II) NV(0): <default monitor>: Using default vrefresh range of 
50.00-70.
00 Hz
[    1.399495] (WW) NV(0): Unable to estimate virtual size
[    1.399532] (II) NV(0): Clock range:  12.00 to 350.00 MHz

CRT + LCD (on ports 1 and 2 respectively:

[    0.685210] (II) NV(0): I2C bus "DDC" initialized.
[    0.685397] (II) NV(0): Probing for analog device on output A...
[    0.687617] (--) NV(0):   ...found one
[    0.687646] (II) NV(0): Probing for analog device on output B...
[    0.689817] (--) NV(0):   ...found one
[    0.689856] (II) NV(0): Probing for EDID on I2C bus A...
[    0.689923] (II) NV(0): I2C device "DDC:E-EDID segment register" registered 
at address 0x60.
[    0.689955] (II) NV(0): I2C device "DDC:ddc2" registered at address 0xA0.
[    1.199672] (II) NV(0):   ... none found
[    1.199793] (II) NV(0): Probing for EDID on I2C bus B...
[    1.287662] (--) NV(0): DDC detected a CRT:
[    1.287751] (II) NV(0): Manufacturer: BNQ  Model: 76c2  Serial#: 6798
[    1.287780] (II) NV(0): Year: 2005  Week: 47
[    1.287804] (II) NV(0): EDID Version: 1.3
[    1.287825] (II) NV(0): Analog Display Input,  Input Voltage Level: 
0.700/0.700 V
[    1.287882] (II) NV(0): Sync:  Separate  Composite
[    1.287932] (II) NV(0): Max Image Size [cm]: horiz.: 43  vert.: 27
[    1.287989] (II) NV(0): Gamma: 2.20
[    1.288058] (II) NV(0): DPMS capabilities: StandBy Suspend Off; RGB/Color 
Display
[    1.288122] (II) NV(0): Default color space is primary color space
[    1.288144] (II) NV(0): First detailed timing is preferred mode
[    1.288168] (II) NV(0): redX: 0.640 redY: 0.332   greenX: 0.288 greenY: 0.601
[    1.288223] (II) NV(0): blueX: 0.146 blueY: 0.065   whiteX: 0.313 whiteY: 
0.329
[    1.288272] (II) NV(0): Supported VESA Video Modes:
[    1.288293] (II) NV(0): 720x...@70hz
[    1.288313] (II) NV(0): 640x...@60hz
[    1.288333] (II) NV(0): 640x...@75hz
[    1.288351] (II) NV(0): 800x...@60hz
[    1.288370] (II) NV(0): 800x...@75hz
[    1.288388] (II) NV(0): 832x...@75hz
[    1.288408] (II) NV(0): 1024x...@60hz
[    1.288428] (II) NV(0): 1024x...@70hz
[    1.288445] (II) NV(0): 1024x...@75hz
[    1.288465] (II) NV(0): 1280x1...@75hz
[    1.288486] (II) NV(0): 1152x...@75hz
[    1.288503] (II) NV(0): Manufacturer's mask: 0
[    1.288524] (II) NV(0): Supported Future Video Modes:
[    1.288544] (II) NV(0): #0: hsize: 800  vsize 600  refresh: 75  vid: 20293
[    1.288572] (II) NV(0): #1: hsize: 1024  vsize 768  refresh: 75  vid: 20321
[    1.288597] (II) NV(0): #2: hsize: 1280  vsize 960  refresh: 60  vid: 16513
[    1.288622] (II) NV(0): #3: hsize: 1280  vsize 1024  refresh: 60  vid: 32897
[    1.288646] (II) NV(0): #4: hsize: 1280  vsize 1024  refresh: 75  vid: 36737
[    1.288671] (II) NV(0): #5: hsize: 1152  vsize 864  refresh: 75  vid: 20337
[    1.288695] (II) NV(0): #6: hsize: 1680  vsize 1050  refresh: 60  vid: 179
[    1.288720] (II) NV(0): Supported additional Video Mode:
[    1.288741] (II) NV(0): clock: 146.2 MHz   Image Size:  433 x 271 mm
[    1.288786] (II) NV(0): h_active: 1680  h_sync: 1784  h_sync_end 1960 
h_blank_end 2240 h_border: 0
[    1.288824] (II) NV(0): v_active: 1050  v_sync: 1053  v_sync_end 1059 
v_blanking: 1089 v_border: 0
[    1.288861] (II) NV(0): Supported additional Video Mode:
[    1.288882] (II) NV(0): clock: 25.2 MHz   Image Size:  376 x 301 mm
[    1.288923] (II) NV(0): h_active: 640  h_sync: 656  h_sync_end 752 
h_blank_end 800 h_border: 0
[    1.289018] (II) NV(0): v_active: 350  v_sync: 387  v_sync_end 389 
v_blanking: 449 v_border: 0
[    1.289055] (II) NV(0): Ranges: V min: 56 V max: 76 Hz, H min: 30 H max: 84 
kHz, PixClock max 170 MHz
[    1.289093] (II) NV(0): Monitor name: BenQ FP202W
[    1.289113] (II) NV(0): EDID (in hex):
[    1.289150] (II) NV(0):      00ffffffffffff0009d1c2768e1a0000
[    1.289184] (II) NV(0):      2f0f01036c2b1b78eecfb5a355499925
[    1.289216] (II) NV(0):      105054a56f80454f614f81408180818f
[    1.298285] (II) NV(0):      714fb300010121399030621a274068b0
[    1.298363] (II) NV(0):      3600b10f1100001cd50980a0205e6310
[    1.298400] (II) NV(0):      10605208782d1100001a000000fd0038
[    1.298434] (II) NV(0):      4c1e5411000a202020202020000000fc
[    1.298470] (II) NV(0):      0042656e51204650323032570a2000e0
[    1.298495] (--) NV(0): CRTC 1 appears to have a CRT attached
[    1.298523] (II) NV(0): Using CRT on CRTC 1
[    1.298579] (II) NV(0): EDID vendor "BNQ", prod id 30402
[    1.298754] (II) NV(0): Using EDID range info for horizontal sync
[    1.298779] (II) NV(0): Using EDID range info for vertical refresh

-- 
8.04 beta: GeForce4 Ti 4200 + Dell M993c = low resolution
https://bugs.launchpad.net/bugs/208620
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