Hello,

my monitor has a maximun resolution of 1280x1024 but xrandr shows me three wrong
resolutions:

$ xrandr
Screen 0: minimum 320 x 200, current 1280 x 1024, maximum 1600 x 1200
DVI-1 connected 1280x1024+0+0 (normal left inverted right x axis y axis) 
376mm x 301mm
    1280x1024      60.0*+   75.0     59.9     60.0*
    1600x1024      60.0
    1400x1050      60.0
    1440x900       60.2
    1280x960       60.0
    1280x800       60.0
    1152x864       75.0
    1280x768       60.0
    1024x768       75.1     75.0     70.1     60.0
    832x624        74.6
    800x600        72.2     75.0     60.3     56.2
    640x480        75.0     72.8     75.0     60.0     59.9
    720x400        70.1
DVI-0 disconnected (normal left inverted right x axis y axis)

1600x1024 1400x1050 and 1440x900 are not possible. My xorg.conf is very simple
(from a lenny installation last month):

--8<--
# xorg.conf (X.Org X Window System server configuration file)
#
# This file was generated by dexconf, the Debian X Configuration tool, using
# values from the debconf database.
#
# Edit this file with caution, and see the xorg.conf manual page.
# (Type "man xorg.conf" at the shell prompt.)
#
# This file is automatically updated on xserver-xorg package upgrades *only*
# if it has not been modified since the last upgrade of the xserver-xorg
# package.
#
# If you have edited this file but would like it to be automatically updated
# again, run the following command:
#   sudo dpkg-reconfigure -phigh xserver-xorg

Section "InputDevice"
        Identifier      "Generic Keyboard"
        Driver          "kbd"
        Option          "XkbRules"      "xorg"
        Option          "XkbModel"      "pc105"
        Option          "XkbLayout"     "de"
        Option          "XkbVariant"    "nodeadkeys"
EndSection

Section "InputDevice"
        Identifier      "Configured Mouse"
        Driver          "mouse"
EndSection

Section "Device"
        Identifier      "Configured Video Device"
EndSection

Section "Monitor"
        Identifier      "Configured Monitor"
EndSection

Section "Screen"
        Identifier      "Default Screen"
        Monitor         "Configured Monitor"
EndSection
--8<--

Xorg.0.log

--8<--
X.Org X Server 1.4.2
Release Date: 11 June 2008
X Protocol Version 11, Revision 0
Build Operating System: Linux Debian (xorg-server 2:1.4.2-4)
Current Operating System: Linux bn2002032436 2.6.26-1-486 #1 Wed Aug 20 12:11:07 UTC 2008 i686
Build Date: 15 August 2008  07:19:42PM
 
        Before reporting problems, check http://wiki.x.org
        to make sure that you have the latest version.
Module Loader present
Markers: (--) probed, (**) from config file, (==) default setting,
        (++) from command line, (!!) notice, (II) informational,
        (WW) warning, (EE) error, (NI) not implemented, (??) unknown.
(==) Log file: "/var/log/Xorg.0.log", Time: Mon Sep  8 12:17:24 2008
(==) Using config file: "/etc/X11/xorg.conf"
(==) No Layout section.  Using the first Screen section.
(**) |-->Screen "Default Screen" (0)
(**) |   |-->Monitor "Configured Monitor"
(==) No device specified for screen "Default Screen".
        Using the first device section listed.
(**) |   |-->Device "Configured Video Device"
(==) |-->Input Device "Configured Mouse"
(==) |-->Input Device "Generic Keyboard"
(==) The core pointer device wasn't specified explicitly in the layout.
        Using the first mouse device.
(==) The core keyboard device wasn't specified explicitly in the layout.
        Using the first keyboard device.
(==) Automatically adding devices
(==) Automatically enabling devices
...
(II) Primary Device is: PCI 03:00:0
(--) Assigning device section with no busID to primary device
(WW) RADEON: No matching Device section for instance (BusID PCI:3:0:1) found
(--) Chipset ATI FireMV 2200 PCIE (RV370) 5B65 (PCIE) found
...
(II) Setting vga for screen 0.
(II) RADEON(0): MMIO registers at 0x00000000f8000000: size 64KB
(II) RADEON(0): PCI bus 3 card 0 func 0
(==) RADEON(0): Depth 24, (==) framebuffer bpp 32
(II) RADEON(0): Pixel depth = 24 bits stored in 4 bytes (32 bpp pixmaps)
(==) RADEON(0): Default visual is TrueColor
(II) Loading sub module "vgahw"
(II) LoadModule: "vgahw"
(II) Loading /usr/lib/xorg/modules//libvgahw.so
(II) Module vgahw: vendor="X.Org Foundation"
        compiled for 1.4.2, module version = 0.1.0
        ABI class: X.Org Video Driver, version 2.0
(II) RADEON(0): vgaHWGetIOBase: hwp->IOBase is 0x03d0, hwp->PIOOffset is 0x0000
(==) RADEON(0): RGB weight 888
(II) RADEON(0): Using 8 bits per RGB (8 bit DAC)
(--) RADEON(0): Chipset: "ATI FireMV 2200 PCIE (RV370) 5B65 (PCIE)" (ChipID = 0x5b65)
(--) RADEON(0): Linear framebuffer at 0x00000000f0000000
(II) RADEON(0): PCIE card detected
(II) Loading sub module "int10"
(II) LoadModule: "int10"
(II) Loading /usr/lib/xorg/modules//libint10.so
(II) Module int10: vendor="X.Org Foundation"
        compiled for 1.4.2, module version = 1.0.0
        ABI class: X.Org Video Driver, version 2.0
(II) RADEON(0): initializing int10
(II) RADEON(0): Primary V_BIOS segment is: 0xc000
(II) RADEON(0): Legacy BIOS detected
drmOpenDevice: node name is /dev/dri/card0
drmOpenDevice: open result is 10, (OK)
drmOpenByBusid: Searching for BusID pci:0000:03:00.0
drmOpenDevice: node name is /dev/dri/card0
drmOpenDevice: open result is 10, (OK)
drmOpenByBusid: drmOpenMinor returns 10
drmOpenByBusid: drmGetBusid reports pci:0000:03:00.0
(II) RADEON(0): [dri] Found DRI library version 1.3.0 and kernel module version 1.29.0
(==) RADEON(0): Page Flipping disabled
(II) RADEON(0): Will try to use DMA for Xv image transfers
(II) RADEON(0): Generation 2 PCI interface, using max accessible memory
(II) RADEON(0): Detected total video RAM=131072K, accessible=131072K (PCI BAR=131072K)
(--) RADEON(0): Mapped VideoRAM: 131072 kByte (64 bit DDR SDRAM)
(II) RADEON(0): Color tiling enabled by default
(II) RADEON(0): Max desktop size set to 2560x1200
(II) RADEON(0): For a larger or smaller max desktop size, add a Virtual line to your xorg.conf
(II) RADEON(0): If you are having trouble with 3D, reduce the desktop size by adjusting the Virtual line to your xorg.conf
(II) Loading sub module "ddc"
(II) LoadModule: "ddc"(II) Module "ddc" already built-in
(II) Loading sub module "i2c"
(II) LoadModule: "i2c"(II) Module "i2c" already built-in
(II) RADEON(0): ref_freq: 2700, min_out_pll: 20000, max_out_pll: 40000, min_in_pll: 40, max_in_pll: 3000, xclk: 19600, sclk: 196.000000, mclk: 324.000000
(II) RADEON(0): PLL parameters: rf=2700 rd=12 min=20000 max=40000; xclk=19600
(II) RADEON(0): Bios Connector table: 
(II) RADEON(0): Port0: DDCType-0x64, DACType-2, TMDSType-1, ConnectorType-2
(II) RADEON(0): Port1: DDCType-0x60, DACType-1, TMDSType-2, ConnectorType-2
(II) RADEON(0): Output DVI-1 using monitor section Configured Monitor
(II) RADEON(0): DFP table revision: 4
(II) RADEON(0): I2C bus "DVI-1" initialized.
(II) RADEON(0): Output DVI-0 has no monitor section
(II) RADEON(0): External TMDS Table revision: 2
(II) RADEON(0): I2C bus "DVO" initialized.
(II) RADEON(0): I2C device "DVO:RADEON DVO Controller" registered at address 0x70.
(II) RADEON(0): I2C bus "DVI-0" initialized.
(II) RADEON(0): Port0:
 Monitor   -- AUTO
 Connector -- DVI-I
 DAC Type  -- TVDAC/ExtDAC
 TMDS Type -- Internal
 DDC Type  -- 0x64
(II) RADEON(0): Port1:
 Monitor   -- AUTO
 Connector -- DVI-I
 DAC Type  -- Primary
 TMDS Type -- External
 DDC Type  -- 0x60
(II) RADEON(0): I2C device "DVI-1:ddc2" registered at address 0xA0.
(II) RADEON(0): EDID vendor "FUS", prod id 1362
(II) RADEON(0): Using EDID range info for horizontal sync
(II) RADEON(0): Using EDID range info for vertical refresh
(II) RADEON(0): Printing DDC gathered Modelines:
(II) RADEON(0): Modeline "1280x1024"x0.0  108.00  1280 1328 1440 1688  1024 1025 1028 1066 +hsync +vsync (64.0 kHz)
(II) RADEON(0): Modeline "800x600"x0.0   40.00  800 840 968 1056  600 601 605 628 +hsync +vsync (37.9 kHz)
(II) RADEON(0): Modeline "640x480"x0.0   31.50  640 656 720 840  480 481 484 500 -hsync -vsync (37.5 kHz)
(II) RADEON(0): Modeline "640x480"x0.0   25.20  640 656 752 800  480 490 492 525 -hsync -vsync (31.5 kHz)
(II) RADEON(0): Modeline "720x400"x0.0   28.32  720 738 846 900  400 412 414 449 -hsync +vsync (31.5 kHz)
(II) RADEON(0): Modeline "1280x1024"x0.0  135.00  1280 1296 1440 1688  1024 1025 1028 1066 +hsync +vsync (80.0 kHz)
(II) RADEON(0): Modeline "1024x768"x0.0   78.80  1024 1040 1136 1312  768 769 772 800 +hsync +vsync (60.1 kHz)
(II) RADEON(0): Modeline "1024x768"x0.0   65.00  1024 1048 1184 1344  768 771 777 806 -hsync -vsync (48.4 kHz)
(II) RADEON(0): Modeline "800x600"x0.0   49.50  800 816 896 1056  600 601 604 625 +hsync +vsync (46.9 kHz)
(II) RADEON(0): Modeline "1280x1024"x59.9  109.00  1280 1368 1496 1712  1024 1027 1034 1063 -hsync +vsync (63.7 kHz)
(II) RADEON(0): Output: DVI-1, Detected Monitor Type: 3
(II) RADEON(0): Panel infos found from DDC detailed: 1280x1024
(II) RADEON(0): EDID data from the display on output: DVI-1 ----------------------
(II) RADEON(0): Manufacturer: FUS  Model: 552  Serial#: 26173
(II) RADEON(0): Year: 2006  Week: 43
(II) RADEON(0): EDID Version: 1.3
(II) RADEON(0): Digital Display Input
(II) RADEON(0): Max H-Image Size [cm]: horiz.: 38  vert.: 30
(II) RADEON(0): Gamma: 2.20
(II) RADEON(0): DPMS capabilities: Off; RGB/Color Display
(II) RADEON(0): First detailed timing is preferred mode
(II) RADEON(0): redX: 0.640 redY: 0.330   greenX: 0.300 greenY: 0.600
(II) RADEON(0): blueX: 0.150 blueY: 0.060   whiteX: 0.313 whiteY: 0.329
(II) RADEON(0): Supported VESA Video Modes:
(II) RADEON(0): 720x400@70Hz
(II) RADEON(0): 640x480@60Hz
(II) RADEON(0): 640x480@75Hz
(II) RADEON(0): 800x600@60Hz
(II) RADEON(0): 800x600@75Hz
(II) RADEON(0): 1024x768@60Hz
(II) RADEON(0): 1024x768@75Hz
(II) RADEON(0): 1280x1024@75Hz
(II) RADEON(0): Manufacturer's mask: 0
(II) RADEON(0): Supported Future Video Modes:
(II) RADEON(0): #0: hsize: 1280  vsize 1024  refresh: 60  vid: 32897
(II) RADEON(0): Supported additional Video Mode:
(II) RADEON(0): clock: 108.0 MHz   Image Size:  376 x 301 mm
(II) RADEON(0): h_active: 1280  h_sync: 1328  h_sync_end 1440 h_blank_end 1688 h_border: 0
(II) RADEON(0): v_active: 1024  v_sync: 1025  v_sync_end 1028 v_blanking: 1066 v_border: 0
(II) RADEON(0): Ranges: V min: 56  V max: 76 Hz, H min: 30  H max: 82 kHz, PixClock max 140 MHz
(II) RADEON(0): Monitor name: P19-2
(II) RADEON(0): Serial No: YEJU026173
(II) RADEON(0): EDID (in hex):
(II) RADEON(0):         00ffffffffffff001ab352053d660000
(II) RADEON(0):         2b10010380261e782aee95a3544c9926
(II) RADEON(0):         0f5054a54b0081800101010101010101
(II) RADEON(0):         010101010101302a009851002a403070
(II) RADEON(0):         1300782d1100001e000000fd00384c1e
(II) RADEON(0):         520e000a202020202020000000fc0050
(II) RADEON(0):         31392d320a20202020202020000000ff
(II) RADEON(0):         0059454a553032363137330a202000ae
finished output detect: 0
(II) RADEON(0): I2C device "DVI-0:ddc2" registered at address 0xA0.
(II) RADEON(0): I2C device "DVI-0:ddc2" removed.
(II) RADEON(0): I2C device "DVI-0:ddc2" registered at address 0xA0.
(II) RADEON(0): I2C device "DVI-0:ddc2" removed.
(II) RADEON(0): I2C device "DVI-0:ddc2" registered at address 0xA0.
(II) RADEON(0): I2C device "DVI-0:ddc2" removed.
(II) RADEON(0): Output: DVI-0, Detected Monitor Type: 0
finished output detect: 1
finished all detect

As you can see no 1400x or 1600x resolutions.
xrandr shouldn't display these resolutions because the monitor cannot handle it.

Thank you.