Go Back   nV News Forums > Linux Support Forums > NVIDIA Linux

Newegg Daily Deals

Reply
 
Thread Tools
Old 04-19-07, 09:29 AM   #1
sleepylight
Registered User
 
Join Date: Jul 2004
Posts: 14
Default Samsung Syncmaster 225BW

I'm having problems getting my new montior to reach it's native resolution. I have a Samsung Syncmaster 225BW wich is a 22" monitor with a native resolution of 1680x1050. It appears that the EDID values for this monitor are incorrect, and it's telling the Nvidia drivers that the top resolution is 1280x1024. I understand from reading other posts that the nvidia drivers consider the EDID values more authoritative than any conflicting values in xorg.conf (which is a reasonable assumption), but it looks like I need to override what the monitor is saying.

I've tried the NoEdidDFPMaxSizeCheck option, but either that isn't working, or I don't have enough alternative information for the drivers to switch to a higher resolution. I also tried setting UseEIDID to false and adding a modeline, but that hasn't worked either.

I'm sure this isn't too difficult to fix, I probably just need a little guidance.

I've attached a bz2 compressed copy of my nvidia-bug-report.log file

Section "ServerLayout"
Identifier "single head configuration"
Screen 0 "Screen0" 0 0
InputDevice "Keyboard0" "CoreKeyboard"
EndSection

Section "Files"
ModulePath "/usr/lib/xorg/modules/extensions/nvidia"
ModulePath "/usr/lib/xorg/modules"
EndSection

Section "Module"
Load "ddc"
Load "glx"
Load "dbe"
Load "extmod"
EndSection
Section "InputDevice"
Identifier "Keyboard0"
Driver "kbd"
Option "XkbModel" "pc105"
Option "XkbLayout" "us"
EndSection

Section "Monitor"

### Comment all HorizSync and VertSync values to use DDC:
### Comment all HorizSync and VertSync values to use DDC:
# HorizSync 31.5 - 90.0
# VertRefresh 59.9 - 60.1
Identifier "SyncMaster 225BW"
ModelName "LCD Panel 1680x1050"
Option "dpms"
EndSection

Section "Device"
Identifier "Videocard0"
Driver "nvidia"
Option "AddARGBGLXVisuals" "True"
Option "ModeValidation" "NoEdidDFPMaxSizeCheck"
EndSection

Section "Screen"
Identifier "Screen0"
Device "Videocard0"
Monitor "SyncMaster 225BW"
DefaultDepth 24
SubSection "Display"
Viewport 0 0
Depth 24
Modes "1680x1050" "1400x1050" "1280x1024" "1280x960" "1280x800" "1152x864" "1024x768" "800x600" "640x480"
EndSubSection
EndSection
Attached Files
File Type: bz2 nvidia-bug-report.log.bz2 (31.3 KB, 180 views)
sleepylight is offline   Reply With Quote
Old 04-19-07, 10:41 AM   #2
netllama
NVIDIA Corporation
 
Join Date: Dec 2004
Posts: 8,763
Default Re: Samsung Syncmaster 225BW

The problem is here:
(--) NVIDIA(0): Samsung SyncMaster (DFP-0): 135.0 MHz maximum pixel clock

According to the EDID, your display requires at least a 147Mhz pixelclock for the 1680x1050 mode:
(--) NVIDIA(0): 1680 x 1050 @ 60 Hz
(--) NVIDIA(0): Pixel Clock : 146.25 MHz
(--) NVIDIA(0): HRes, HSyncStart : 1680, 1784
(--) NVIDIA(0): HSyncEnd, HTotal : 1960, 2240
(--) NVIDIA(0): VRes, VSyncStart : 1050, 1053
(--) NVIDIA(0): VSyncEnd, VTotal : 1059, 1089
(--) NVIDIA(0): H/V Polarity : -/+
netllama is offline   Reply With Quote
Old 04-19-07, 10:53 AM   #3
sleepylight
Registered User
 
Join Date: Jul 2004
Posts: 14
Default Re: Samsung Syncmaster 225BW

Quote:
Originally Posted by netllama
The problem is here:
(--) NVIDIA(0): Samsung SyncMaster (DFP-0): 135.0 MHz maximum pixel clock

According to the EDID, your display requires at least a 147Mhz pixelclock for the 1680x1050 mode:
(--) NVIDIA(0): 1680 x 1050 @ 60 Hz
(--) NVIDIA(0): Pixel Clock : 146.25 MHz
(--) NVIDIA(0): HRes, HSyncStart : 1680, 1784
(--) NVIDIA(0): HSyncEnd, HTotal : 1960, 2240
(--) NVIDIA(0): VRes, VSyncStart : 1050, 1053
(--) NVIDIA(0): VSyncEnd, VTotal : 1059, 1089
(--) NVIDIA(0): H/V Polarity : -/+
Ok. I don't quite understand what that means though. Is this a limitation, or is this something fixable?
sleepylight is offline   Reply With Quote
Old 04-19-07, 11:18 AM   #4
netllama
NVIDIA Corporation
 
Join Date: Dec 2004
Posts: 8,763
Default Re: Samsung Syncmaster 225BW

This looks like a limitation of your hardware. I guess you could try to override it with the ModeValidation driver option.
netllama is offline   Reply With Quote
Old 04-19-07, 11:33 AM   #5
sleepylight
Registered User
 
Join Date: Jul 2004
Posts: 14
Default Re: Samsung Syncmaster 225BW

Quote:
Originally Posted by netllama
This looks like a limitation of your hardware. I guess you could try to override it with the ModeValidation driver option.
Ok. Do you think this is a monitor limitation, or a video card limitation? Would you give me an example of how to use the ModeValiation option? It looks like there are all sorts of values to use with it.

Thanks for your help.
sleepylight is offline   Reply With Quote
Old 04-19-07, 11:46 AM   #6
sleepylight
Registered User
 
Join Date: Jul 2004
Posts: 14
Default Re: Samsung Syncmaster 225BW

Interestingly enough I just set up another one of these monitors on an identical workstation with an identical video card (except that the other card's DVI connector is broken) and found that in analog mode the monitor automatically comes up in 1680x1050. Any ideas?
sleepylight is offline   Reply With Quote
Old 04-19-07, 11:51 AM   #7
netllama
NVIDIA Corporation
 
Join Date: Dec 2004
Posts: 8,763
Default Re: Samsung Syncmaster 225BW

Analog connections (with CRT's) have a much higher pixelclock.

You can try the following option:
Option "ModeValidation" "NoMaxPClkCheck"
netllama is offline   Reply With Quote
Old 04-19-07, 12:04 PM   #8
sleepylight
Registered User
 
Join Date: Jul 2004
Posts: 14
Default Re: Samsung Syncmaster 225BW

Ignoring the pixel clock did not help the situation. Do you think I'm just better off switching to the Analog connector? I'm willing to do it, even though I really prefer DVI.
sleepylight is offline   Reply With Quote

Old 04-19-07, 12:16 PM   #9
sleepylight
Registered User
 
Join Date: Jul 2004
Posts: 14
Default Re: Samsung Syncmaster 225BW

Got it!!!!!!

I had put both "NoEdidDFPMaxSizeCheck" and "NoMaxPClkCheck" on the same line. I cut out the max size check and everythign started working! This looks so nice on the DVI connector. Thanks a lot!
sleepylight is offline   Reply With Quote
Old 03-24-09, 10:10 AM   #10
Bdog26
Registered User
 
Join Date: Mar 2009
Posts: 1
Default Re: Samsung Syncmaster 225BW

hey, I am having the same exact problem except I don't know where to go about adding those parameters you guys were talking about.. Please help me, I'm stuck in this godawful resolution and I would like it to be fixed. and I also can't seem to use my digital connection.. I don't know if this problem is related... but when I plug in my digital cable and switch the monitor to digital mode I get nothing, as if I haven't even plugged in the cable. I have checked the cable and it is fine.. not sure what the problem is there.

thank you ahead of time to anyone who can help out!
Bdog26 is offline   Reply With Quote
Old 03-24-09, 12:30 PM   #11
logan
Registered User
 
Join Date: Aug 2002
Posts: 492
Default Re: Samsung Syncmaster 225BW

looks like it should go inside the video card section of /etc/X11/xorg.conf:
Code:
Section "Device"
  Driver "nvidia"
  Option "ModeValidation" "NoEdidDFPMaxSizeCheck, NoMaxPClkCheck"
EndSection
logan is offline   Reply With Quote
Reply


Thread Tools

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Forum Jump


Similar Threads
Thread Thread Starter Forum Replies Last Post
$319.99 - SAMSUNG SyncMaster S24A450MW Black 24" 5ms Widescreen Height & Pivot Adjus News 24-Inch 0 06-10-12 01:35 PM
$199.99 - SAMSUNG SyncMaster B2240W Black 22" Height Adjustable Widescreen LCD Monito News 22-Inch 0 06-10-12 01:24 PM
$227.99 - Samsung SyncMaster S22A450MW 22' LED LCD Monitor - 16:10 - 5 ms News 22-Inch 0 06-10-12 01:24 PM
$139.99 - Samsung SyncMaster EX2020X 20' LED LCD Monitor - 16:9 - 5 ms News 20-Inch 0 06-10-12 01:17 PM
$179.99 - SAMSUNG SyncMaster S19A450BW-1 Black 19" 5ms Widescreen LED-Backlit LCD Mon News 19-Inch 0 06-10-12 01:13 PM

All times are GMT -5. The time now is 05:28 PM.


Powered by vBulletin® Version 3.7.1
Copyright ©2000 - 2014, Jelsoft Enterprises Ltd.
Copyright 1998 - 2014, nV News.