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Lcd + Mac = Ghosting With Text

#1 User is offline   crazy4laptops 

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Posted 21 March 2010 - 11:02 AM

im having an ohh nuts moment with my powermac G5

a friend of mine let me borrow his samsung syncmaster 912n for more screen surface area for video editing and whatnot

as i've come to find out, this display is vga only... no worries just use the mac dvi to vga adapter

when i hooked it up to my mac, all text & icons are double ghosted to the right... kinda like a jpeg with artifacts

happens at all resolutions 1024x768 all the way up to 1280x1024

on windows, there is no ghosting...

short of a new video card, any thoughts on a fix because this monitor + mac will be very straining on the eyes

see attached pictures

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This post has been edited by crazy4laptops: 21 March 2010 - 11:41 AM

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#2 User is offline   smax013 

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Posted 21 March 2010 - 12:23 PM

View Postcrazy4laptops, on 21 March 2010 - 11:02 AM, said:

im having an ohh nuts moment with my powermac G5

a friend of mine let me borrow his samsung syncmaster 912n for more screen surface area for video editing and whatnot

as i've come to find out, this display is vga only... no worries just use the mac dvi to vga adapter

when i hooked it up to my mac, all text & icons are double ghosted to the right... kinda like a jpeg with artifacts

happens at all resolutions 1024x768 all the way up to 1280x1024

on windows, there is no ghosting...

short of a new video card, any thoughts on a fix because this monitor + mac will be very straining on the eyes

see attached pictures


What kind of monitor where you using with it before you used the Samsung? I assume it did NOT have the same issue.

When you hook it up to the Windows computer are you also using the VGA adapter? Or it is only a DVI connection?

What kind of DVI cable is it? DVI-I? Or is it a DVI-D cable? I do not know what would happen if you tried a DVI-D cable with a VGA adapter. I do not know if it would just not work or if it might produce the effect you are seeing (as it would be missing pins/wires that the analog signal needs).
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#3 User is offline   crazy4laptops 

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Posted 21 March 2010 - 12:32 PM

View Postsmax013, on 21 March 2010 - 12:23 PM, said:

View Postcrazy4laptops, on 21 March 2010 - 11:02 AM, said:

im having an ohh nuts moment with my powermac G5

a friend of mine let me borrow his samsung syncmaster 912n for more screen surface area for video editing and whatnot

as i've come to find out, this display is vga only... no worries just use the mac dvi to vga adapter

when i hooked it up to my mac, all text & icons are double ghosted to the right... kinda like a jpeg with artifacts

happens at all resolutions 1024x768 all the way up to 1280x1024

on windows, there is no ghosting...

short of a new video card, any thoughts on a fix because this monitor + mac will be very straining on the eyes

see attached pictures


What kind of monitor where you using with it before you used the Samsung? I assume it did NOT have the same issue.

When you hook it up to the Windows computer are you also using the VGA adapter? Or it is only a DVI connection?

What kind of DVI cable is it? DVI-I? Or is it a DVI-D cable? I do not know what would happen if you tried a DVI-D cable with a VGA adapter. I do not know if it would just not work or if it might produce the effect you are seeing (as it would be missing pins/wires that the analog signal needs).


i was using a vga CRT display... very crisp and bright (no ghosting)

i only have windows computers with vga... no ghosting

its the DVI-I adapter, i don't have access to DVI-D right now

but there is a DVI-A standard as well, but idk if video adapters sold at staples would have that

i'll be testing a different video card/different video adapter tomorrow
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#4 User is offline   smax013 

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Posted 21 March 2010 - 12:41 PM

View Postcrazy4laptops, on 21 March 2010 - 12:32 PM, said:

i was using a vga CRT display... very crisp and bright (no ghosting)

i only have windows computers with vga... no ghosting

its the DVI-I adapter, i don't have access to DVI-D right now

but there is a DVI-A standard as well, but idk if video adapters sold at staples would have that

i'll be testing a different video card/different video adapter tomorrow


I did not mention DVI-A because it should definitely work as would DVI-I. I was mainly double-checking that it was not a DVI-D. I suspect it would just not work, but I do not know for sure...there was a slight chance that maybe it would produce such an effect, but I doubted it.

Anyways, since you are using a DVI-I cable, then that is definitely not the issue.

At this point, my leading suspicion would likely be the video card.

FWIW, I consistently use a Mac with a DVI-to-VGA connector and a VGA port on an LCD monitor (I have the DVI port being used by a Windows desktop) with no such issues. And this has been the case with several different Samsung monitors.
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#5 User is offline   crazy4laptops 

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Posted 21 March 2010 - 03:40 PM

View Postsmax013, on 21 March 2010 - 12:41 PM, said:

View Postcrazy4laptops, on 21 March 2010 - 12:32 PM, said:

i was using a vga CRT display... very crisp and bright (no ghosting)

i only have windows computers with vga... no ghosting

its the DVI-I adapter, i don't have access to DVI-D right now

but there is a DVI-A standard as well, but idk if video adapters sold at staples would have that

i'll be testing a different video card/different video adapter tomorrow


I did not mention DVI-A because it should definitely work as would DVI-I. I was mainly double-checking that it was not a DVI-D. I suspect it would just not work, but I do not know for sure...there was a slight chance that maybe it would produce such an effect, but I doubted it.

Anyways, since you are using a DVI-I cable, then that is definitely not the issue.

At this point, my leading suspicion would likely be the video card.

FWIW, I consistently use a Mac with a DVI-to-VGA connector and a VGA port on an LCD monitor (I have the DVI port being used by a Windows desktop) with no such issues. And this has been the case with several different Samsung monitors.


that's good to know that samsung monitors are not the culprit lol

i will definitely try a new video card to see if that helps (hopefully that will fix it if worst comes to worst)

random question, what video card(s) do you have?
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#6 User is offline   smax013 

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Posted 21 March 2010 - 04:09 PM

View Postcrazy4laptops, on 21 March 2010 - 03:40 PM, said:

that's good to know that samsung monitors are not the culprit lol

i will definitely try a new video card to see if that helps (hopefully that will fix it if worst comes to worst)

random question, what video card(s) do you have?


My old MacBook Pro is a first generation MacBook Pro with a 1.83 GHz Intel Core Duo and ATI Mobility Radeon X1600 with 128 MB of GDDR3 SDRAM.

My new MacBook Pro is a current 17" with a 2.8 GHz Intel Core 2 Duo and nVidia GeForce 9400M w/shared memory & nVidia GeForce 9600M GT with 512 MB of GDDR3 memory.

I forget what my PowerMac G4 has for a video card...I only really use it for thing that I need to run in Classic/OS 9. Whatever it is, it has a VGA connector...no DVI.
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#7 User is offline   crazy4laptops 

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Posted 26 March 2010 - 10:57 AM

View Postsmax013, on 21 March 2010 - 04:09 PM, said:

View Postcrazy4laptops, on 21 March 2010 - 03:40 PM, said:

that's good to know that samsung monitors are not the culprit lol

i will definitely try a new video card to see if that helps (hopefully that will fix it if worst comes to worst)

random question, what video card(s) do you have?


My old MacBook Pro is a first generation MacBook Pro with a 1.83 GHz Intel Core Duo and ATI Mobility Radeon X1600 with 128 MB of GDDR3 SDRAM.

My new MacBook Pro is a current 17" with a 2.8 GHz Intel Core 2 Duo and nVidia GeForce 9400M w/shared memory & nVidia GeForce 9600M GT with 512 MB of GDDR3 memory.

I forget what my PowerMac G4 has for a video card...I only really use it for thing that I need to run in Classic/OS 9. Whatever it is, it has a VGA connector...no DVI.


now that i did some testing with some pci-e video cards-- one from asus, ati, and nvidia (all brand new) none of them worked in the powermac... the display was black/asleep

my next question becomes, which video cards do work in a Powermac G5?
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#8 User is offline   smax013 

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Posted 31 March 2010 - 04:56 PM

View Postcrazy4laptops, on 26 March 2010 - 10:57 AM, said:

now that i did some testing with some pci-e video cards-- one from asus, ati, and nvidia (all brand new) none of them worked in the powermac... the display was black/asleep

my next question becomes, which video cards do work in a Powermac G5?


Your best bet would be to look up the various specifications on the Apple site for the PowerMac G5 and see what Apple offered as video card options:

http://support.apple...specs/#powermac

Those should have the appropriate drivers built into the OS.

Beyond that, you would have to do some searching to see if someone has a "tweak" to get other cards to work.
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#9 User is offline   crazy4laptops 

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Posted 31 March 2010 - 05:20 PM

View Postsmax013, on 31 March 2010 - 04:56 PM, said:

View Postcrazy4laptops, on 26 March 2010 - 10:57 AM, said:

now that i did some testing with some pci-e video cards-- one from asus, ati, and nvidia (all brand new) none of them worked in the powermac... the display was black/asleep

my next question becomes, which video cards do work in a Powermac G5?


Your best bet would be to look up the various specifications on the Apple site for the PowerMac G5 and see what Apple offered as video card options:

http://support.apple...specs/#powermac

Those should have the appropriate drivers built into the OS.

Beyond that, you would have to do some searching to see if someone has a "tweak" to get other cards to work.


hmmmm, no hacks today lol

im gonna try another monitor... i've had success with a few dell monitors... i'm gonna grab one off of ebay and see what happens
the one i found has dvi, so no vga adapter needed
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#10 User is offline   crazy4laptops 

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Posted 07 April 2010 - 05:41 PM

it was an why didn't i think of that earlier moment... it was a very simple fix
(i guess that's the engineer in me)

i grabbed a new new video cable and all is at peace with the world

it works perfectly =) im happy that its not something strange with the monitor
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#11 User is offline   smax013 

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Posted 07 April 2010 - 06:37 PM

View Postcrazy4laptops, on 07 April 2010 - 05:41 PM, said:

it was an why didn't i think of that earlier moment... it was a very simple fix
(i guess that's the engineer in me)

i grabbed a new new video cable and all is at peace with the world

it works perfectly =) im happy that its not something strange with the monitor


It is always the simple stuff that saves the day after we over look it for a while...and then we do the "Doh!" moment. :D
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