Bug 154947

Created attachment 71128 [details]
nvidia-bug-report.log

The error messages in the logfile are not really helpful. :-(

[...]
(II) NVIDIA(0): Not using mode "1920x1200" (bad mode clock/interlace/doublescan)
(II) NVIDIA(0): Not using mode "1920x1200" (bad mode clock/interlace/doublescan)
[...]
(II) NVIDIA(0): Not using mode "1920x1200" (no mode of this name)

It doesn't get better when not specifying the 1920x1200 modeline. The only difference it that these lines no longer occur in the logfile.

(II) NVIDIA(0): Not using mode "1920x1200" (bad mode clock/interlace/doublescan)
(II) NVIDIA(0): Not using mode "1920x1200" (bad mode clock/interlace/doublescan)

Looks like the NVIDIA driver does not support this mode. At least not on this board.

Andy, is this a known limitation in the driver?

> (--) NVIDIA(0): DFP-0: maximum pixel clock: 165 MHz
Might be a problem. ' Option "IgnoreEDID" "on" ' might help here, but will likely be dangerous (pixel clock to high).

  Modeline      "1920x1200" 239.63 1920 2064 2272 2624 1200 1201 1204 1251
  Modeline      "1920x1200" 204.39 1920 2056 2264 2608 1200 1201 1204 1244

We should try the modeline used by the nv driver instead.
(II) NV(0): clock: 154.0 MHz   Image Size:  495 x 310 mm
(II) NV(0): h_active: 1920  h_sync: 1968  h_sync_end 2000 h_blank_end 2080 h_border: 0
(II) NV(0): v_active: 1200  v_sync: 1203  v_sync_end 1209 v_blanking: 1235 v_border: 0
(II) NV(0): Ranges: V min: 48  V max: 85 Hz, H min: 30  H max: 94 kHz, PixClock max 170 MHz

Modeline      "1920x1200" 1920 1968 2000 2008 1200 1203 1209 1235

Mike, could you try this modeline?

> Modeline      "1920x1200" 1920 1968 2000 2008 1200 1203 1209 1235
Modeline      "1920x1200" 154 1920 1968 2000 2008 1200 1203 1209 1235

Yes, this seems to work. I tested only remote and could not
see the X screen, but now I see the following lines in the Xorg.0.log
file:

    (**) NVIDIA(0): Validated modes for display device DFP-0:
    (**) NVIDIA(0):      Mode "1920x1200": 154.0 MHz, 76.7 kHz, 62.1 Hz

This looks good, but having a deeper look at the logfile it seems to me that the NVIDIA driver does *not* have any modelines for some high definition modes, e.g.:

(II) NVIDIA(0): Not using mode "1920x1200" (no mode of this name)
(II) NVIDIA(0): Not using mode "1900x1200" (no mode of this name)
(II) NVIDIA(0): Not using mode "1600x1200" (no mode of this name)

http://en.wikipedia.org/wiki/DVI

Maximum dot clock is 165 MHz on single link DVI.

For calculating regular modelines there is 'gtf', which produces
  # 1920x1200 @ 60.00 Hz (GTF) hsync: 74.52 kHz; pclk: 193.16 MHz
  Modeline "1920x1200_60.00"  193.16  1920 2048 2256 2592  1200 1201 1204 1242  -HSync +Vsync

In xorg CVS there is 'cvt' that can create modelines for the reduced timing formula as well:

# 1920x1200 59.95 Hz (CVT 2.30MA-R) hsync: 74.04 kHz; pclk: 154.00 MHz
Modeline "1920x1200R"  154.00  1920 1968 2000 2080  1200 1203 1209 1235 +hsync -vsync

Looks similar to the one nv is using, but not equivalent (may be a typo above? 2008 vs 2080).
Note that you should rename the modeline to 1920x1200 when using it. Also the +hsync -vsync is important.

Yes, typo. Mike, please use the modeline from Matthias instead of mine.

Mike, Olaf, you might also need this one to make the modeline active:

Option "ExactModeTimingsDVI" "boolean"

    Forces the initialization of the X server with the exact timings specified
    in the ModeLine. Default: false (for DVI devices, the X server initializes
    with the closest mode in the EDID list).

Mike told me that this modeline did not work for him with his FX5200. FX5200 seems to be limited to a mode of 1440x1050 when using the DVI output. :-(
At least this is what the Xserver log says.

This bugreport has been INVALID from the beginning. NVIDIA driver uses the timings he gets from EDID.