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Old 07-24-07, 01:14 AM   #1
lpowles
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Default 1080i50 TV out on 6150

Hi, I'm looking to get 1080i50 from the component output. The problem is that I cant find a way to specify 50Hz instead of 60Hz which automatically comes from the HD1080i (and even HD720p) setting and any of the modes it supports.

None of the modes specified in the mode pool for the tv encoder (in xorg.log for HD1080i) says anything about specifying frequency .. how do I get 50Hz?

Thanks.
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Old 07-24-07, 02:23 PM   #2
pe1chl
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Default Re: 1080i50 TV out on 6150

It seems that this is a "not possible and we won't fix it!" item for Nvidia.

Of course it is no problem to make 1080i50 on the VGA output. You could consider using a VGA to Component converter (a dumb one that only converts the signal levels) when your TV does not have a VGA input.
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Old 07-29-07, 06:25 PM   #3
lpowles
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Default Re: 1080i50 TV out on 6150

Thanks pe1chl for your response.

After some heavier digging it seems like this is just something the driver is missing .. and will never be implemented judging by the non-response to this post in 2004: http://www.nvnews.net/vbulletin/show...ight=component

I have noticed that I get 50Hz refresh in HD576p. There must be a way to specify a 50Hz mode in 1080i .. I know 1920x1080_50 method doesnt work and that all the modes listed in the modepool dont actually show the refresh, but there must be a way?? How come the 720x576 mode added to the pool in HD576p is 50Hz but nothing else is?

I know modelines dont work, but is there some other way to gain some control over what is put in the modepool for TVout?
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Old 07-30-07, 11:43 AM   #4
philipl
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Default Re: 1080i50 TV out on 6150

Quote:
Originally Posted by lpowles
I have noticed that I get 50Hz refresh in HD576p. There must be a way to specify a 50Hz mode in 1080i .. I know 1920x1080_50 method doesnt work and that all the modes listed in the modepool dont actually show the refresh, but there must be a way?? How come the 720x576 mode added to the pool in HD576p is 50Hz but nothing else is?
576p is derived from PAL which is 50Hz - so it is 50Hz. 480p is derived from NTSC, so it's 60p. All the true HD modes (720, 1080) are standardised to run at 60Hz. As the refresh rates are all hard-coded, that's all you're going to get.

You actually have 1080i50 content to watch?
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Old 07-30-07, 03:25 PM   #5
pe1chl
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Default Re: 1080i50 TV out on 6150

Quote:
Originally Posted by philipl
All the true HD modes (720, 1080) are standardised to run at 60Hz. As the refresh rates are all hard-coded, that's all you're going to get.
In the USA, probably. In Europe they are standardised at 50 Hz.

Quote:
Originally Posted by philipl
You actually have 1080i50 content to watch?
All HD content is transmitted at 50 Hz here.
What you find on Internet is mostly 60 Hz.
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Old 07-31-07, 12:28 AM   #6
lpowles
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Default Re: 1080i50 TV out on 6150

Quote:
Originally Posted by philipl
576p is derived from PAL which is 50Hz - so it is 50Hz. 480p is derived from NTSC, so it's 60p.
Why does 576i come out at 60Hz then?

Quote:
Originally Posted by philipl
All the true HD modes (720, 1080) are standardised to run at 60Hz. As the refresh rates are all hard-coded, that's all you're going to get.

You actually have 1080i50 content to watch?
Like pe1chl said (thanks again), everything broadcast here (Australia, btw) is 50Hz .. have a look at http://www.dba.org.au/index.asp?sectionID=15 if you need convincing.

What is worse is that some (maybe all, i'm not sure?) TVs sold here dont support 60Hz, only 50Hz (ie. my TV!).

So I guess my question is why is this hardcoded? Maybe the TV encoder itself cant handle it .. but the link in the first post suggests that the 6150 encoder can do 1080i50. Do any of the old driver versions have less restrictive TV encoder setup (eg. dont ignore modelines)?
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Old 07-31-07, 12:49 PM   #7
pe1chl
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Default Re: 1080i50 TV out on 6150

Well, my Philips LCD (a standard model sold here in the Netherlands) accepts both 1080i50 and 1080i60. But it also accepts 576i at both rates, and PAL or NTSC.
However, when I want to view 50 Hz material it would be a bad choice to let the videocard run at 60fps.

Fortunately the TV has a VGA input so I can connect it directly to the PC videocard without using a TV-out encoder and limiting driver software. The VGA output can still be controlled with modelines. But for how long? It looks like with DVI there already is trouble not unlike the TV-encoder (driver not wanting to listen to what the user tells it)....
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