NVIDIA driver thinks I am still using a CRT monitor with my new LCD monitor?

  • Thread starter Thread starter Ant
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A

Ant

Hello.

I noticed my latest NVIDIA drivers (both Windows XP and Linux/Debian)
are telling me that I am using a CRT which is untrue. Yes, I installed
the monitor INF driver and removed the OLD Samsung SyncMaster 763 MB CRT
monitor from device manager (hidden).

Someone told me that it is because of my VGA connections (not using DVI
due to my old/2001 Belkin KVM switch (2-ports). I would test the DVI
cable, but the monitor did not come with one (this is normal) nor do I
have one (will have to buy/borrow one).

Is this a normal behavior? Thank you in advance. :)
--
"When many work together for a goal, great things may be accomplished. It is said a lion cub was killed by a single colony of ants." --Saskya Pandita
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I noticed my latest NVIDIA drivers (both Windows XP and Linux/Debian)
The problem is most likely that the drivers can't see the display's EDID
information, and therefore cannot identify the display model or type.
This may be due to that information not making it through your KVM
switch - does it occur when you have a direct connection between
the monitor and the PC? If so, then it may be that the display does
not correctly identify itself in its EDID.
Click to expand...

Thanks Bob. I will try that. KVM is old (from 2000). Do I assume its
detection should work with a direct VGA connection? Or do I need DVI for
that to work?
--
"When many work together for a goal, great things may be accomplished. It is said a lion cub was killed by a single colony of ants." --Saskya Pandita
/\___/\
/ /\ /\ \ Ant @ http://antfarm.ma.cx (Personal Web Site)
| |o o| | Ant's Quality Foraged Links (AQFL): http://aqfl.net
\ _ / Please remove ANT if replying by e-mail.
( )
 
Ant said:
Hello.

I noticed my latest NVIDIA drivers (both Windows XP and Linux/Debian)
are telling me that I am using a CRT which is untrue. Yes, I installed
the monitor INF driver and removed the OLD Samsung SyncMaster 763 MB CRT
monitor from device manager (hidden).

Someone told me that it is because of my VGA connections (not using DVI
due to my old/2001 Belkin KVM switch (2-ports). I would test the DVI
cable, but the monitor did not come with one (this is normal) nor do I
have one (will have to buy/borrow one).
Click to expand...

The problem is most likely that the drivers can't see the display's EDID
information, and therefore cannot identify the display model or type.
This may be due to that information not making it through your KVM
switch - does it occur when you have a direct connection between
the monitor and the PC? If so, then it may be that the display does
not correctly identify itself in its EDID.

Bob M.
 
Ant said:
Thanks Bob. I will try that. KVM is old (from 2000). Do I assume its
detection should work with a direct VGA connection? Or do I need DVI for
that to work?
Click to expand...

Both VGA and DVI connections support reading the monitor EDID
information, if the monitor is providing the correct EDID in the first
place.
But it may not be getting through the KVM.

Bob M.
 
Both VGA and DVI connections support reading the monitor EDID
information, if the monitor is providing the correct EDID in the first
place.
But it may not be getting through the KVM.
Click to expand...

Just wondering. Do newer KVMs have these EDID reading support?
--
"When many work together for a goal, great things may be accomplished. It is said a lion cub was killed by a single colony of ants." --Saskya Pandita
/\___/\
/ /\ /\ \ Ant @ http://antfarm.ma.cx (Personal Web Site)
| |o o| | Ant's Quality Foraged Links (AQFL): http://aqfl.net
\ _ / Please remove ANT if replying by e-mail.
( )
 
Just wondering. Do newer KVMs have these EDID reading support?
--
Click to expand...

They certainly can, but I can't speak for any particular model. Having
support for EDID reads basically means having a couple of lines connected
properly through the switch. One problem with a switched VGA setup,
though, is that there is often no mechanism for detecting when the
switch has been thrown after boot-up. In other words, you might be
able to read the EDID for whatever monitor is connected at the time the
PC boots - but if you switch to a different monitor after that point,
there's
nothing that triggers a read of the EDID for this second monitor, and the
system goes merrily along its way using the original information.

Bob M.
 
They certainly can, but I can't speak for any particular model. Having
support for EDID reads basically means having a couple of lines connected
properly through the switch. One problem with a switched VGA setup,
though, is that there is often no mechanism for detecting when the
switch has been thrown after boot-up. In other words, you might be
able to read the EDID for whatever monitor is connected at the time the
PC boots - but if you switch to a different monitor after that point,
there's
nothing that triggers a read of the EDID for this second monitor, and the
system goes merrily along its way using the original information.
Click to expand...

Interesting. So, DVI-based KVMs don't have this problem. Hmm.
--
"When many work together for a goal, great things may be accomplished. It is said a lion cub was killed by a single colony of ants." --Saskya Pandita
/\___/\
/ /\ /\ \ Ant @ http://antfarm.ma.cx (Personal Web Site)
| |o o| | Ant's Quality Foraged Links (AQFL): http://aqfl.net
\ _ / Please remove ANT if replying by e-mail.
( )
 
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