Nvidia 8756 and refresh problem

pepz · 04-20-06, 11:56 AM

since i've installed ubuntu 5.10 on my LCD screen, a SAMTRON 72v, i've got problems with refresh... i've set the VertRefresh at 56 ~ 75 Hz and horizsync at 31 ~ 81 kHz, like wrotten on monitor guide...
My screen resolution is: 1280 x 1024@75Hz, but on the guide table it is written that the optimal resolution is 1280 x 1024@60Hz
I send you my Xorg.0.log and my xorg.conf
How can i set the refresh at 60hz? In the gnome menu i've only 75hz option...
I've read this post: http://www.nvnews.net/vbulletin/show...3&postcount=18
and i've added this line to Monitor section

Code:

Modeline       "1280x1024_60"   135.00   1280 1296 1440 1688   1024 1025 1028 1066 +hsync +vsync

But it doesn't works...
Have i to install again the drivers?
Thanks
Bye
Peppe

whig · 04-21-06, 02:49 AM

In your X conf change this

Code:

SubSection     "Display"
        Depth       24
        Modes      "1280x1024" "1024x768" "800x600" "640x480"
EndSubSection

to

Code:

SubSection     "Display"
        Depth       24
        Modes      "1280x1024_60" "1024x768_60" "800x600" "640x480"
EndSubSection

pepz · 04-21-06, 04:08 AM

i've done what you said, but at 60hz, the images on the screen are worst, they are more choppy than 75hz mode.
What can i do?
I continue to have the choppy problem.
Sorry for my english, but i'm italian.
Bye
Peppe

whig · 04-21-06, 05:06 AM

I know what you mean about low refresh rates. The screen flickers. Very annoying. I'm using 85Hz at the moment - the most I can do. I suggest leaving the settings at the most your screen can handle, don't go over it.

pepz · 04-21-06, 05:11 AM

ok thanks, the most is 75hz, my actual configuration
bye
Peppe

pepz · 04-21-06, 09:15 AM

i continue to have refresh problem...
what can i also modify in my xorg.conf?
i've read this: http://www.nvnews.net/vbulletin/show...9&postcount=36
so can i add nohoryzcheck and novertcheck option? and use an higher refresh rate?
Bye
Peppe

whig · 04-21-06, 08:45 PM

You will need to look at your X log to see what is going on. It's in /var/log/. if it still gives you grief attach a nvidia bug report here.

pepz · 04-22-06, 04:13 AM

ok here you are the logs.
thanks
peppe

whig · 04-22-06, 04:33 AM

I'm unsure but you could try commented out these lines from your X conf.

Code:

Option         "UseEdidFreqs"         "FALSE"
Option         "UseEDID"              "FALSE"
Option         "ModeValidation"       "NoEdidModes"

houxiang zhu · 04-22-06, 09:08 AM

In the begining, I have trouble with nvidia&FC5 , screen black. Then I installed the nvidia8756 driver, but it can't startx X. then I removed /etc/X11/xorg.conf, now it works, X started!

pepz · 04-22-06, 12:33 PM

whig, i don't understand...
i must comment that lines?
bye
peppe

whig · 04-22-06, 08:33 PM

Simply put a # character at the start of the line. It turns the line into a comment and not something for the computer to process.

04-21-06, 02:49 AM	#2
whig 550Ti Join Date: Jan 2004 Location: New Zealand Posts: 854	Re: Nvidia 8756 and refresh problem In your X conf change this Code: SubSection "Display" Depth 24 Modes "1280x1024" "1024x768" "800x600" "640x480" EndSubSection to Code: SubSection "Display" Depth 24 Modes "1280x1024_60" "1024x768_60" "800x600" "640x480" EndSubSection

04-21-06, 04:08 AM	#3
pepz Registered User Join Date: Apr 2006 Posts: 42	Re: Nvidia 8756 and refresh problem i've done what you said, but at 60hz, the images on the screen are worst, they are more choppy than 75hz mode. What can i do? I continue to have the choppy problem. Sorry for my english, but i'm italian. Bye Peppe

04-21-06, 05:06 AM	#4
whig 550Ti Join Date: Jan 2004 Location: New Zealand Posts: 854	Re: Nvidia 8756 and refresh problem I know what you mean about low refresh rates. The screen flickers. Very annoying. I'm using 85Hz at the moment - the most I can do. I suggest leaving the settings at the most your screen can handle, don't go over it.

04-21-06, 05:11 AM	#5
pepz Registered User Join Date: Apr 2006 Posts: 42	Re: Nvidia 8756 and refresh problem ok thanks, the most is 75hz, my actual configuration bye Peppe

04-21-06, 09:15 AM	#6
pepz Registered User Join Date: Apr 2006 Posts: 42	Re: Nvidia 8756 and refresh problem i continue to have refresh problem... what can i also modify in my xorg.conf? i've read this: http://www.nvnews.net/vbulletin/show...9&postcount=36 so can i add nohoryzcheck and novertcheck option? and use an higher refresh rate? Bye Peppe Last edited by pepz; 04-21-06 at 09:27 AM.

04-21-06, 08:45 PM	#7
whig 550Ti Join Date: Jan 2004 Location: New Zealand Posts: 854	Re: Nvidia 8756 and refresh problem You will need to look at your X log to see what is going on. It's in /var/log/. if it still gives you grief attach a nvidia bug report here.

04-22-06, 04:33 AM	#9
whig 550Ti Join Date: Jan 2004 Location: New Zealand Posts: 854	Re: Nvidia 8756 and refresh problem I'm unsure but you could try commented out these lines from your X conf. Code: Option "UseEdidFreqs" "FALSE" Option "UseEDID" "FALSE" Option "ModeValidation" "NoEdidModes"

04-22-06, 09:08 AM	#10
houxiang zhu Registered User Join Date: Dec 2005 Posts: 5	Re: Nvidia 8756 and refresh problem In the begining, I have trouble with nvidia&FC5 , screen black. Then I installed the nvidia8756 driver, but it can't startx X. then I removed /etc/X11/xorg.conf, now it works, X started!

04-22-06, 12:33 PM	#11
pepz Registered User Join Date: Apr 2006 Posts: 42	Re: Nvidia 8756 and refresh problem whig, i don't understand... i must comment that lines? bye peppe

04-22-06, 08:33 PM	#12
whig 550Ti Join Date: Jan 2004 Location: New Zealand Posts: 854	Re: Nvidia 8756 and refresh problem Simply put a # character at the start of the line. It turns the line into a comment and not something for the computer to process.