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New TV won't display 1080p from my laptop?

AFurryReptile

AFurryReptile

Golden Member
So I just bought a new Panasonic TC-L42U12, and I'm trying to get it to play videos from my Lenovo y710 laptop.

The problem is, Windows detects the TV as a "Generic non pnp display", and won't give me the option to utilize the TV's max resolution. I've tried forcing it with Catalyst Control Center, and the screen simply stays black. I know my laptop can display 1920x1020 just fine, because I've used it on my 24" Acer monitor.

I am currently using a VGA cable, and I'm not sure if that's the problem(My HDMI cable hasn't arrived yet). I don't think it should make a difference, but I don't know.

If anyone has any insight, I would appreciate it. This is really frustrating.
 
What resolution are you getting and what refresh rate are you trying to use a 1920x1080 resolution?

Is the VGA cable connected directly to the tv from the laptop or is it passing through a switch?

have you rebooted the computer while the tv and laptop were connected with the tv display switched to the PC Input?
 
Because it has low resolution probably. It's a issue with your labtop. The video card on the laptop can not display 1920x1080p
 
tweakboy said:
Because it has low resolution probably. It's a issue with your labtop. The video card on the laptop can not display 1920x1080p
Click to expand...

You should try rereading the OP. He said he could display 1920x1080 on an acer 24" monitor.

OP: The panasonic viera series can only display a max of 1280x1024 using a VGA cable. I ran into the same thing with my 32" viera TV. After hooking up an HDMI cable, I am now running 1920x1080.

From page 48 in the manual:

vieraresolutions.JPG
 
Thanks guys, that's good to hear. I had no idea there was a limit to the resolution that could be put through a VGA cable, especially since I've made it work before. I guess that explains why the performance on my monitor was never really there via VGA...

Thanks for the explanation, much appreciated 🙂
 
I still think its the laptops integrated video card. Its a old one or something, no support for it,, gl
 
i'm a little surprised he still has his account, to be honest. With regard to ATOT, P&N, and L&R, each member has a new mental disorder unknown to science. For the remaining tech-related forums, there are two kinds of people we get here at anandtech: there are people who don't post regularly but know they can get correct answers very quickly here, and there are people who do post regularly because they are bored, have answers, and are mature enough to deliver them succinctly.

Tweakboy doesn't fulfill either role, in fact he fastidiously scans a thread, discovers the direction it's going in and its consensus view, and then will make several posts against that consensus in a stupidly coy but diabolically clumsy way ("thx," "gl" are obvious nods to his troll ethic). in this case it's common knowledge around here that the VGA spec is capable, but not required to do 1080p, so manufacturers will not go through the expense to ensure 1080 over VGA works for their sets. the point is that his douchebaggery has been shown to be consistently deliberate for months now and no one has the balls to do anything about it. or are we waiting for his thousandth post?

at least Nemesis takes the time and effort to assemble adult-sized arguments from his twisted logic, and Nemesis has the ability to do this without using a tone that indicates he wants to subtly sabotage every thread he posts in. tweakboy on the other hand is nothing more than a clean-up job for the good members around here, and customarily that is someone else's job. i've never seen him help and/or solve an OP. i've never seen him bring constructive points to a technical discussion. i've never seen him post anything correct, for that matter.


"oh ya this habbened to me ten seconds ago just hook it up a ethernet jack on ur hard drive boom problem solved thx."
 
Last edited:
AFurryReptile said:
Thanks guys, that's good to hear. I had no idea there was a limit to the resolution that could be put through a VGA cable, especially since I've made it work before. I guess that explains why the performance on my monitor was never really there via VGA...

Thanks for the explanation, much appreciated 🙂
Click to expand...

I don't think it is the vga cable that has the limitation. My samsung ln37b650 works fine at 1920x1080 over vga. It is not ideal i know, but that is what most of my computers have for video output and that is what my kvm uses. I only have 2 computers that can do dvi out put. none with direct hdmi output. One of them i got a dvi-hdmi adapter and am using it that way. It is ok, but i'm not really seeing any difference. Keep in mind though, my eye sight sucks.
 
JoeBleed said:
I don't think it is the vga cable that has the limitation.
Click to expand...

You're right. If you think about it, years ago when we all had CRTs connected to VGA cables, we could do 2048x1536 resolution just fine. Now we think that VGA cables are some wimpy cable that isn't even capable of 1920x1080!

I'm not sure why they do it, but the TV manufacturers limit the resolution of the VGA port. It seems that most HDTVs have this limitation, but some do not and can display 1920x1080 over VGA just fine.
 
KLin said:
Probably because VGA does not support HDCP.
Click to expand...

Why would HDCP matter if he's just trying to use it as a monitor? I could see your point if it worked fine in Windows and then went black when playing a BD, but that's not the case here.
 
Got the HDMI cable today, works great! Playing 1080p movies with no issues whatsoever!

...so long as they don't use flash. Holy crap is flash at that resolution choppy. Fail, Adobe, fail.
 
kalrith said:
You're right. If you think about it, years ago when we all had CRTs connected to VGA cables, we could do 2048x1536 resolution just fine. Now we think that VGA cables are some wimpy cable that isn't even capable of 1920x1080!

I'm not sure why they do it, but the TV manufacturers limit the resolution of the VGA port. It seems that most HDTVs have this limitation, but some do not and can display 1920x1080 over VGA just fine.
Click to expand...

what do you mean years ago!! i'm still using dual crts at work and the only reason my crt at home got replaced with my tv is because it was much bigger and could serve dual purpose. 🙂

I still have my crt. and sadly i've had to drag it out twice when working on someone else's computer due to resolution and refresh rates not being supported by my tv/monitor. couldn't change them in safe mode either. 🙁

I don't know why the manufactures limit vga input resolution either, but i would love to know. That is something i paid close attention to when i did my shopping. and there are a lot of them like that. most of them were plasma's from what i saw, but not all of them.

As for the HDCP theory, it would make sense if blu-ray playing software wouldn't prevent you from outputting video over the analog vga cable. But i don't know if it would or not. I don't have a blu-ray drive. They can't copy protect analog very well. I've read set top boxes will limit output quality over non hdcp connections. Anyone with blu-ray player and software that can test this out using vga, it would be cool to hear your results.
 
alyarb said:
i'm a little surprised he still has his account, to be honest. With regard to ATOT, P&N, and L&R, each member has a new mental disorder unknown to science. For the remaining tech-related forums, there are two kinds of people we get here at anandtech: there are people who don't post regularly but know they can get correct answers very quickly here, and there are people who do post regularly because they are bored, have answers, and are mature enough to deliver them succinctly.

Tweakboy doesn't fulfill either role, in fact he fastidiously scans a thread, discovers the direction it's going in and its consensus view, and then will make several posts against that consensus in a stupidly coy but diabolically clumsy way ("thx," "gl" are obvious nods to his troll ethic). in this case it's common knowledge around here that the VGA spec is capable, but not required to do 1080p, so manufacturers will not go through the expense to ensure 1080 over VGA works for their sets. the point is that his douchebaggery has been shown to be consistently deliberate for months now and no one has the balls to do anything about it. or are we waiting for his thousandth post?

at least Nemesis takes the time and effort to assemble adult-sized arguments from his twisted logic, and Nemesis has the ability to do this without using a tone that indicates he wants to subtly sabotage every thread he posts in. tweakboy on the other hand is nothing more than a clean-up job for the good members around here, and customarily that is someone else's job. i've never seen him help and/or solve an OP. i've never seen him bring constructive points to a technical discussion. i've never seen him post anything correct, for that matter.


"oh ya this habbened to me ten seconds ago just hook it up a ethernet jack on ur hard drive boom problem solved thx."
Click to expand...


This is so epic that if I could I'd put the whole thing in my signature.

You are my new idol alyarb.
 
It's prolly the lowest cost method to comply with HDCP requirements as opposed to normally allowing a signal and then downgrading when detected. Sad.
 
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