(Feisty) I have the same problem. It seems like it never probes my DDC/EDID properly. 1680x1050, 16:10 widescreen here.
Adding "1680x1050" to Xorg works, although it seems it should be auto- detected. nvidia-settings seems to be able to detect my resolution, and I was able to switch it on-the-fly despite 1680x1050 missing out of Xorg.conf. Attached is my monitor's EDID (binary data, 128 bytes). Also, here are all the modes it originally detected: SZ: Pixels Physical Refresh *0 1024 x 768 ( 433mm x 270mm ) *50 1 800 x 600 ( 338mm x 211mm ) 51 55 56 2 640 x 480 ( 270mm x 169mm ) 52 60 3 960 x 600 ( 406mm x 211mm ) 53 4 840 x 525 ( 355mm x 185mm ) 54 5 800 x 512 ( 338mm x 180mm ) 57 6 720 x 450 ( 304mm x 158mm ) 58 7 640 x 512 ( 270mm x 180mm ) 59 8 640 x 400 ( 270mm x 141mm ) 61 9 640 x 384 ( 270mm x 135mm ) 62 10 512 x 384 ( 216mm x 135mm ) 63 11 400 x 300 ( 169mm x 105mm ) 64 65 12 320 x 240 ( 135mm x 84mm ) 66 Just 'defaults' as far as I can tell. The next 4:3 resolution is 1280x960 and it didn't detect that for my 1680x1050 monitor. Interesting lines from Xorg.0.log (with 'nvidia' driver): (--) NVIDIA(0): Connected display device(s) on GeForce 7800 GT at PCI:1:0:0: (--) NVIDIA(0): NEC 20WMGX2 (DFP-0) (--) NVIDIA(0): NEC 20WMGX2 (DFP-0): 310.0 MHz maximum pixel clock (--) NVIDIA(0): NEC 20WMGX2 (DFP-0): Internal Dual Link TMDS (II) NVIDIA(0): Assigned Display Device: DFP-0 (II) NVIDIA(0): Validated modes: (II) NVIDIA(0): "1024x768" (II) NVIDIA(0): "800x600" (II) NVIDIA(0): "640x480" (II) NVIDIA(0): Virtual screen size determined to be 1024 x 768 (--) NVIDIA(0): DPI set to (60, 72); computed from "UseEdidDpi" X config (--) NVIDIA(0): option ** Attachment added: "EDID - NEC 20WMGX2 1680x1050 widescreen - NOT autodetected" http://librarian.launchpad.net/7039091/edid.bin -- Monitor resolution 1680x1050 not recognised https://launchpad.net/bugs/95265 -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
