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Old 12-11-05, 09:05 AM   #1
robust
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Unhappy 81.74 - Wrong resolution is used by default

The nvidia driver detects that the resolution 1792x1344 is out of hsync, but still it uses it as default.

Here's the log
Xorg.0.log

Here's my configuration
xorg.conf.txt

My monitors (LCD) highest resolution is 1280x1024 (19 inch) @ 75hz
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Old 12-11-05, 10:51 AM   #2
netllama
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Default Re: 81.74 - Wrong resolution is used by default

I have a few questions:
0) What exactly is happening on your DFP? Is it receiving a video signal?
1) I think the problem here is that you failed to specify any modes in your X configuration, so the driver is using the first one that is provided from the EDID of your DFP:
(**) NVIDIA(0): Default mode "1792x1344": 204.8 MHz, 83.7 kHz, 60.0 Hz
If you add a Modes entry to the Screen section of your X configuration, does that have any impact?
2) If specifying a mode doesn't help, please start X with the following command:
startx -- -logverbose 6
and then generate and post a bug report.
3) What kind of DFP do you have?

Thanks,
Lonni
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Old 12-11-05, 03:40 PM   #3
robust
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Post Re: 81.74 - Wrong resolution is used by default

0. No, it doesnt get a signal.

1. I never specify modes for any of computers I use. I always run on the highest available resolution that is available. (1280x1024 for my TFT and 1600x1200 for my computer with a CRT) And this has been detected fine and has worked for me for 1 1/2 years when I first found out that you don't need to specify hertz or resolution.

2. Specifying a resolution is a valid temporary fix and it works.

3. LG 1915s (and my CRT is a Dell D1226H 1200HS Series)

I have noticed that this problem also affects my other computer, that has the CRT. It tries to set the resolution to 2200x1200 or something like that. But the screens maximum resolution is as early stated 1600x1200. I use the same configuration on that computer.

I don't know how this works , but from what I've read EDID is integrated into the display and stores information about it. In the logfile that I provided EDID tells the nvidia driver this:

) NVIDIA(0): Connected display device(s): CRT-1
(--) NVIDIA(0): CRT-1: maximum pixel clock: 400 MHz
(II) NVIDIA(0): Frequency information for CRT-1:
(II) NVIDIA(0): HorizSync : 30.000-83.000 kHz
(II) NVIDIA(0): VertRefresh : 56.000-75.000 Hz
(II) NVIDIA(0): (HorizSync from EDID)
(II) NVIDIA(0): (VertRefresh from EDID)
(II) NVIDIA(0): LG1915S: Using hsync range of 30.00-83.00 kHz
(II) NVIDIA(0): LG1915S: Using vrefresh range of 56.00-75.00 Hz
(II) NVIDIA(0): Clock range: 12.00 to 400.00 MHz

Then the driver prints out several lines with modes that aren't going to be used. But it still uses them, that's a problem. I don't know if the nvidia driver get's any information regarding the maximum resolution from EDID but I can't see anything that indicates that. I guess that it calculates it from the clock range and sync, but I might be wrong.
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Old 12-11-05, 04:00 PM   #4
netllama
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Default Re: 81.74 - Wrong resolution is used by default

By default, the driver will always try to use the information in the EDID. If you'd like further assistance with this issue, please generate and provide the bug report that I requested in my last post.

Thanks,
Lonni
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Old 12-11-05, 05:01 PM   #5
kdog
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Default Re: 81.74 - Wrong resolution is used by default

I see the same issue with the refresh rates. I added the "UseEdidFreqs" "false" option and it fixed it.

I'm using a Viewsonic VP191b 19" LCD. When I started X without the option, I would get off-colored pixels all over the place. It's hard to explain what it looked like exactly.

Before (using EDID):
(II) NVIDIA(0): HorizSync : 30.000-82.000 kHz
(II) NVIDIA(0): VertRefresh : 50.000-85.000 Hz

After (UseEdidFreqs = false, using my xorg.conf's defined settings):
(II) NVIDIA(0): HorizSync : 31.500-79.000 kHz
(II) NVIDIA(0): VertRefresh : 50.000-70.000 Hz

I actually saw this problem with my old nvidia driver (7176), and that's what caused me to step down the refresh rates.
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Old 12-11-05, 05:10 PM   #6
robust
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Default Re: 81.74 - Wrong resolution is used by default

Well, the information provided by my EDID is correct so I shouldn't have to define anything. And neither should you, if yours is correct. Verbose Xorg Log
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Old 12-11-05, 05:31 PM   #7
netllama
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Default Re: 81.74 - Wrong resolution is used by default

robust,
Are you attaching the LG1915S via an analog connector, or use some kind of adapater? Also, does this problem also occur if you attach the LG1915S via a pure digital DVI connector?

kdog,
Please generate a bug report after starting X with the following command:
startx -- -logverbose 6

Providing just an X log is insufficient.

Thanks,
Lonni
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Old 12-11-05, 07:27 PM   #8
robust
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Default Re: 81.74 - Wrong resolution is used by default

I use a analog connection without any "adapters". It's not possible to connect my monitor trough DVI.
What does the connection have to do with it? As I said in my earlier post, my CRT also has the exact same problem.
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Old 12-11-05, 07:41 PM   #9
netllama
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Default Re: 81.74 - Wrong resolution is used by default

The connection has alot to do with things, as the driver treats DFP's (digital) differently than CRTs (analog).

Just so that I'm clear, your LG LCD is only capable of analog connections?

I'd like to see a full bug report (with verbose X log) from your system when the CRT is experiencing this problem, as you haven't provided a bug report from this system.

Thanks,
Lonni
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Old 12-11-05, 07:55 PM   #10
kdog
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Default Re: 81.74 - Wrong resolution is used by default

Assuming the only place -logverbose dumps to is the Xorg.log, here's the output. I couldn't find that option in any of the man pages I looked at.

edit: this is with xorg using the EDID for freq reference, on a straight DVI connection.

Attached Files
File Type: txt nvidia_startx_verbose.txt (27.7 KB, 103 views)
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Old 12-11-05, 08:06 PM   #11
netllama
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Default Re: 81.74 - Wrong resolution is used by default

kdog,
Based solely on the X log you posted, I don't see anything wrong, and this doesn't look anything like the problem that 'robust' reported in this thread.

Why are you using the ConnectedMonitor option?.

Please post the bug report that I requested, after starting X with the command that I noted earlier

Thanks,
Lonni
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Old 12-11-05, 08:10 PM   #12
kdog
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Default Re: 81.74 - Wrong resolution is used by default

Lonni,

That's what I was trying to ask you in the previous question. What output do you want? Where does the logverbose output to? What I posted was Xorg.0.log using the startx option you requested.

I'm using the connected monitor option just because I read on here it helps speed up the startup a little when it doesn't have to figure it out on its own:

Option "IgnoreDisplayDevices" "CRT,TV"
Option "ConnectedMonitor" "DFP"

Maybe they're mutually exclusive?

Kevin
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