Horizontal lines @ 640x480 w/ CRT monitor

[KenSimone]

I have a Hitachi CM721F 19". Whenver it's at 640x480 it appears that every other line is blank. I never really cared, because I never used 640x480. Unfortunately, with Doom 3, I now have a reason to use that resolution. Anyway. What would cause this? I played with the convergence settings on the monitor. It made no difference. It looks fine on my 17" dell. Thanks!

 

[Rage187]

um, what video card?

 

[KenSimone]

Video card is a BFG ti4200 128meg. As I mentioned, it looks fine on the Dell 17" monitor, so I'm almost certain this is not video card related.

 

[yhelothar]

Sounds like interlacing. Try using the refresh override in the driver, and fix the refresh rate to 85Hz or 120Hz.

 

[KenSimone]

Sounds like interlacing. Try using the refresh override in the driver, and fix the refresh rate to 85Hz or 120Hz.

Thanks for the suggestion. I tried that out. Unfortunately it didn't help. An eaiser solution might be to buy a video card that can play doom at @ > 640x480 🙂

 

[PingSpike]

I had a similar problem a long time ago with my voodoo. 512x384 always did that. I just assumed the monitor did not really support that resolution. Does 640x480 desktop resolution produce the same effect?

 

[Squally Leonharty]

Enable Doublescan in the driver options. It should be in the timings section if I recall correctly. 🙂

 

[Rage187]

my wifes 4200 could run D3 at 1024x768 without a hitch. Why are you doing 640x480?

 

[Squally Leonharty]

Originally posted by: KenSimone
I never really cared, because I never used 640x480. Unfortunately, with Doom 3, I now have a reason to use that resolution.

 

[KenSimone]

my wifes 4200 could run D3 at 1024x768 without a hitch. Why are you doing 640x480?

Hmm... I only get ~20fps. According to this site I'm getting about what I should. Her machine gets better than that?

 

[KenSimone]

Enable Doublescan in the driver options. It should be in the timings section if I recall correctly.

Thanks! That was it. In case anyone is interested, the option (in the nvidia driver) is here:

nView Display Settings >>
Device Settings >>
Device Adjustments >>
Display Mode timing >>
Enable Doublescan for lower resolution modes.

 

[Rage187]

she has a xp 2500 w/ 512mb pc2100. Couple years old.

 

[Squally Leonharty]

Originally posted by: KenSimone

my wifes 4200 could run D3 at 1024x768 without a hitch. Why are you doing 640x480?

Hmm... I only get ~20fps. According to this site I'm getting about what I should. Her machine gets better than that?

Oops, misread Rage187's post. I guess that's what I get when I read too fast. 😛 Sorry. xD

You're welcome, too. 🙂