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Having trouble installing a piece of hardware? Want to know if that peripheral is compatible with Linux?

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Old 07-30-2009, 09:50 PM   #1
justadba
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LG 23" monitor not working


OK I have Oracle Enterprise Linux 4.7 (RedHat ES 4.7 basically) Had a Chimei 22" monitor at 1680x1050. That monitor died on me so I bought an LG 23" and replaced it. Now when OEL boots, I get an error message
"Out of Range" 75.0kHz / 60hz

I edited /etc/X11/xorg.conf and changed the entry of 1680x1050 to 1024x768.....still get the error. What am I missing?

Is my problem refresh rate?

Last edited by justadba; 07-30-2009 at 09:52 PM.
 
Old 07-30-2009, 10:09 PM   #2
J.W.
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Most likely the horizontal and vertical sync rates in xorg.conf aren't compatible with your new monitor. Can you post the specific model number of your new monitor
 
Old 07-31-2009, 11:03 AM   #3
justadba
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W2353V


Here's what my xorg.conf monitor section looks like

Section "Monitor"
Identifier "Monitor0"
VendorName "Monitor Vendor"
ModelName "LCD Panel 1680x1050"
HorizSync 31.5 - 90.0
VertRefresh 60.0 - 60.0
Option "dpms"
EndSection

Last edited by justadba; 07-31-2009 at 11:11 AM.
 
Old 07-31-2009, 11:17 AM   #4
jdkaye
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Have you checked those figures for the refresh rates against the specs on your new monitor?
jdk
 
Old 07-31-2009, 11:22 AM   #5
GrapefruiTgirl
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I think J.W. is on the right track-- Change the HorizSync and especially the VertRefresh entries, in accordance with the ranges specified in your new monitor's user guide. This should fix the issue, barring anything else extremely weird in the xorg.conf file.

FWIW, I have a similar monitor (two of them) and while theoretically they run at 60.00 Hz, in actuality they run at something like 59.99 Hz. Doesn't seem like much of a difference, but if that's what the monitor wants, while X is configged at exactly 60.00, maybe it's enough to generate this trouble you are having.

Sasha
 
Old 07-31-2009, 03:33 PM   #6
J.W.
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From what I have been able to find online, the max vertical rate is 75 and the max horizontal is 83 for your monitor. I'd suggest changing your xorg.conf to use something like
Code:
HorizSync 31.5 - 83.0
VertRefresh 55.0 - 75.0
Those are just suggestions -- what you really want to use are the specific low and high range numbers from the user manual. A couple of quick Google searches didn't turn them up (other than the maximum numbers that I based this response on) but presumably the manual should contain them
 
Old 08-01-2009, 09:22 AM   #7
justadba
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OK guys thanks for all the suggestions....

I did get it working, but I cheated.

I built another OEL box using that monitor (I have a 4 port KVM and my son wanted a LINUX box to start working with it and Oracle). After we built it, I copied the xorg.conf from it to the original one and it works...

Here's the monitor info from the working config...

Section "Monitor"
Identifier "Monitor0"
VendorName "Monitor Vendor"
ModelName "LCD Panel 1680x1050"
HorizSync 31.5 - 65.5
VertRefresh 56.0 - 65.0
Option "dpms"
EndSection

Compare it to the entry in previous posting


Section "Monitor"
Identifier "Monitor0"
VendorName "Monitor Vendor"
ModelName "LCD Panel 1680x1050"
HorizSync 31.5 - 90.0
VertRefresh 60.0 - 60.0
Option "dpms"
EndSection

So I am guessing it was the Horiz sync (31.5 - 90.0 ) that was blitzing it....

Again, thanks
 
  


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