I'm sorry for the delay. Since this bug has enough information, I'm
going to mark it as confirmed.
The main differences between the 2 log files are :
VGA connected
< (--) NVIDIA(0): Sony SDM-P234 (CRT-0)
< (--) NVIDIA(0): Sony SDM-P234 (CRT-0): 350.0 MHz maximum pixel clock
< (II) NVIDIA(0): Assigned Display Device: CRT-0
DVI connected
> (--) NVIDIA(0): Sony SDM-P234 (DFP-0)
> (--) NVIDIA(0): Sony SDM-P234 (DFP-0): 135.0 MHz maximum pixel clock
> (--) NVIDIA(0): Sony SDM-P234 (DFP-0): Internal Single Link TMDS
> (II) NVIDIA(0): Display Device found referenced in MetaMode: DFP-0
> (II) NVIDIA(0): Assigned Display Device: DFP-0
And then
< (II) NVIDIA(0): Virtual screen size determined to be 1920 x 1200
< (--) NVIDIA(0): DPI set to (97, 98); computed from "UseEdidDpi" X config
---
> (II) NVIDIA(0): Virtual screen size determined to be 1600 x 1200
> (--) NVIDIA(0): DPI set to (81, 98); computed from "UseEdidDpi" X config
You can check what xorg is detecting by connecting you dvi cable, log in
console mode then start xorg with the following command:
startx -- -logverbose=6
You'll probably see that 1920x1200 is rejected because mode is too large
for DFP or something like this.
Can you try the following :
connect your dvi cable
add the option below to the monitor section in xorg.conf
Option "ModeValidation" "NoDFPNativeResolutionCheck"
Tell us if it works.
Modes up to 1600x1200 are VESA standardized but manufacturers can do
whatever they want for the ones beyond.
Thanks.
** Changed in: xorg (Ubuntu)
Sourcepackagename: None => xorg
Status: Incomplete => Confirmed
--
no 1920x1200 using DVI cable, but fine with VGA analog cable
https://bugs.launchpad.net/bugs/230486
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