Nvidia drivers, monitor detection not working

Bug #221648 reported by daugustine
2
Affects Status Importance Assigned to Milestone
Ubuntu
Fix Released
Undecided
Unassigned

Bug Description

I really want this bug fixed but I don't know what I need to report or where to start.

The problem started with the Release Candidate, and while searching for answers on what I need to report to you guys nobody really gave me a clear direction.

Basically the problem is that when I enable the nvidia drivers, my max resolution gets incorrectly detected as 640x480. Obviously this is a problem, and would love to see it fixed in order for me to keep using the best and my favorite distro.

Problem is is I don't know if it's an nvidia bug, an xorg bug, etc. and where to even start to figure out what to report.

Btw, my max res. is 1024x768. This worked fine in the alpha's starting at version 5, and through all the beta's... and then I have no idea what went wrong.

Please help, I'm willing to do all I can to find a fix for this.

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daugustine (daugustine) wrote :

Hmm... noticed that if I try to use my other monitor that's hooked up through the VGA port that it works fine and that it is detected correctly. Could this be a problem with xorg detecting the monitor through the VGA to DVI adapter that I have to use for my other monitor. (Both the same monitor, video card has one dvi connect and one vga connector, think it's a 7200 GS but not sure, will check).

Tell me which log files will be useful so I can post them here.

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daugustine (daugustine) wrote :

Here's the Xorg.0.log file if this helps at all.

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daugustine (daugustine) wrote :

And another...

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daugustine (daugustine) wrote :

Also, note, these monitors are to identical models.

Emachines E15T4 (http://www.emachines.com/products/products.html?prod=E15T4).

Just checked this last night, one of them I plug in through the VGA port, or DVI port (with the VGA-to-DVI) adapter, and it detects it correctly, with 1024x768 at 50 Hz. The other I do the same thing, and it detects it with 640x480, no matter which port it's connected to. (and yes, I'm restarting X each time I change the ports).

Here's the weird part, in Gutsy, Feisty, Windows (XP and Vista), and every other distro I've tried, I haven't had this problem using the nvidia driver. So that makes me think it's not the monitor.

Noticed those log files are from a successful run, so I'll get the other two up from unsuccessful logs, so we can compare.

Note this problem is in Hardy (and surfaced about at the time the RC came out, maybe a little bit before that).

Revision history for this message
daugustine (daugustine) wrote :

Just noticed that if I don't restart x, and switch which monitor it uses, it works. But then when I restart x, it goes back to 640x480.

Log files coming for unsuccessful detection.

Revision history for this message
daugustine (daugustine) wrote :

Here's the log file from an unsuccessful detection using the VGA-to-DVI converter.

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daugustine (daugustine) wrote :

And an unsuccessful attempt, with just a plain VGA port.

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daugustine (daugustine) wrote :

So I tried one last attempt... and that was switching the VGA cable from the good monitor to the "bad" monitor, and "voilah!", auto-detection worked... so, looks like I'm off to buy a new VGA cable and looks like this can be closed.

Revision history for this message
trollord (trollenlord) wrote :

Glad it worked out for you.

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