[Bug 15648] New: randr doesn't detect my external LCD' s preferred resolution

[bugzilla-daemon at freedesktop.org]

http://bugs.freedesktop.org/show_bug.cgi?id=15648

           Summary: randr doesn't detect my external LCD's preferred
                    resolution
           Product: xorg
           Version: 7.3
          Platform: x86 (IA32)
        OS/Version: Linux (All)
            Status: NEW
          Severity: normal
          Priority: medium
         Component: Driver/Radeon
        AssignedTo: xorg-driver-ati at lists.x.org
        ReportedBy: zajec5 at gmail.com
         QAContact: xorg-team at lists.x.org


Created an attachment (id=16098)
 --> (http://bugs.freedesktop.org/attachment.cgi?id=16098)
Xorg.0.log

lspci:
01:00.0 VGA compatible controller: ATI Technologies Inc Radeon Mobility X700
(PCIE) (prog-if 00 [VGA controller])
        Subsystem: Acer Incorporated [ALI] Aspire 5024WLMi
        Flags: bus master, fast devsel, latency 0, IRQ 18
        Memory at c8000000 (32-bit, prefetchable) [size=128M]
        I/O ports at 9000 [size=256]
        Memory at c0100000 (32-bit, non-prefetchable) [size=64K]
        Capabilities: [50] Power Management version 2
        Capabilities: [58] Express Endpoint, MSI 00
        Capabilities: [80] Message Signalled Interrupts: Mask- 64bit+ Queue=0/0
Enable-


When I connect my Smasung SyncMaster 710N to my notebook's D-SUB port it is
detected, but xrandr doesn't offer optimal resolution. This should be 1280x1024
(as you can find in LCD's specs) but I don't see such a mode:


zajec at linux:~> xrandr
Screen 0: minimum 320 x 200, current 1280 x 800, maximum 1280 x 1200
VGA-0 connected (normal left inverted right x axis y axis)
   1280x960       60.0
   1280x800       59.8     60.0     58.9
   1152x768       54.8
   1024x768       60.0
   800x600        60.3     56.2
   640x480        59.9
LVDS connected 1280x800+0+0 (normal left inverted right x axis y axis) 330mm x
210mm
   1280x800       60.1*+
   1024x768       60.0
   800x600        60.3
   640x480        59.9
S-video disconnected (normal left inverted right x axis y axis)
DVI-0 disconnected (normal left inverted right x axis y axis)
  1024x768_60 (0x5d)   64.1MHz
        h: width  1024 start 1080 end 1184 total 1344 skew    0 clock   47.7KHz
        v: height  768 start  769 end  772 total  795           clock   60.0Hz


zajec at linux:~> xrandr --output VGA-0 --mode 1280x1024
xrandr: cannot find mode 1280x1024


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