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Old 08-03-06, 09:18 PM   #13
superm1
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Default Re: HDTV (1920x1080) video + nvidia + mythtv = Frustration

Well I just bought a new 30" Samsung SlimFit HDTV.

I have struggled for about 3 hours today with it.

I have a 7600GT with a Samsung 930B LCD via DVI and the HDTV via both component and DVI->HDMI (I tried both).

If I set up just the TV - then I can get 1080i on component (but I want DVI - as thats why I got a TV with HDMI in). Video playback is fine.

If I set up TV with 1080i component, and LCD as a second logical screen in X - hard freeze on Xv playback.

If I set up the TV as DVI->HDMI, I can only get 1280x720 on the DVI out to the TV. I can do 1280x1024 on the LCD. Xv playback is fine. Only fails with the component out.

Do I need to set up a modeline to let it do 1080i on the DVI? I mean is something wrong with the EDID that is reported from the TV back via DVI that it won't accept 1920x1080?
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Old 08-03-06, 11:30 PM   #14
mythtv_buster
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Default Re: HDTV (1920x1080) video + nvidia + mythtv = Frustration

Quote:
Originally Posted by superm1
Well I just bought a new 30" Samsung SlimFit HDTV.

If I set up the TV as DVI->HDMI, I can only get 1280x720 on the DVI out to the TV. I can do 1280x1024 on the LCD. Xv playback is fine. Only fails with the component out.

Do I need to set up a modeline to let it do 1080i on the DVI? I mean is something wrong with the EDID that is reported from the TV back via DVI that it won't accept 1920x1080?
Sounds like you haven't tried a 1080i modeline. Without it how are you expecting to get 1080i out?

On the other hand, although the TV accepts 1080i input it is clearly going to scale it down at least in the horizontal direction as the specs for the TV, from Samsungs website, say it has a "Maximum of 800 lines horizontal resolution". That means instead of 1920 pixels across you are only going to see 800. If you can get 1080i to work compare it with the 1280x720 (720p) which you say you already got working and see which one looks better. If you can't get 1080i to work then use 720p -- its still HD.
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Old 08-04-06, 12:04 AM   #15
superm1
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Default Re: HDTV (1920x1080) video + nvidia + mythtv = Frustration

Quote:
Originally Posted by mythtv_buster
Sounds like you haven't tried a 1080i modeline. Without it how are you expecting to get 1080i out?

On the other hand, although the TV accepts 1080i input it is clearly going to scale it down at least in the horizontal direction as the specs for the TV, from Samsungs website, say it has a "Maximum of 800 lines horizontal resolution". That means instead of 1920 pixels across you are only going to see 800. If you can get 1080i to work compare it with the 1280x720 (720p) which you say you already got working and see which one looks better. If you can't get 1080i to work then use 720p -- its still HD.
Thanks for the quick response. I haven't tried a 1080i modeline yet for two reasons - one is that it worked fine on an ATI card by just adding "1920x1080" to the area for resolution in xorg.conf and the other is that 1080i worked for component the same way. Its just this nvidia card was being finicky. Could you recommend a safe modleline to start with that i can work from? I dont have another hard drive to install windows on and use powerstrip, and have heard some horror stories from using wrong ones to start.
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Old 08-04-06, 02:30 AM   #16
superm1
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Default Re: HDTV (1920x1080) video + nvidia + mythtv = Frustration

Well scratch my previous post. I got around the problem via adding

Option "ModeValidation" "NoVertRefreshCheck"

to my xorg.conf.

Now this introduced the problem of Xv playback on the 1080i display freezing X with dual displays running.

Here is a snippet of what mythtv tells me is going on:

Code:
2006-08-04 02:26:43.572 AFD: Opened codec 0xc35f40, id(MPEG2VIDEO) type(Video)
2006-08-04 02:26:43.573 AFD: Opened codec 0xc36540, id(AC3) type(Audio)
2006-08-04 02:26:43.577 Opening ALSA audio device 'spdif'.
2006-08-04 02:26:44.015 VideoOutputXv: XvMCTex: Init failed
2006-08-04 02:26:44.015 VideoOutputXv: XVideo Adaptor Name: 'NV17 Video Texture'2006-08-04 02:26:44.220 OSDTypePositionImage::AddPosition[0](95x281  1, 1)
2006-08-04 02:26:44.220 OSDTypePositionImage::AddPosition[1](95x311  1, 1)
2006-08-04 02:26:44.220 OSDTypePositionImage::AddPosition[2](95x341  1, 1)
2006-08-04 02:26:44.220 OSDTypePositionImage::AddPosition[3](95x371  1, 1)
2006-08-04 02:26:44.541 New DB connection, total: 3
2006-08-04 02:26:44.543 Using realtime priority.
2006-08-04 02:26:44.547 TV: Changing from None to WatchingPreRecorded
2006-08-04 02:26:44.549 Connected to database 'mythconverg' at host: mythdell
2006-08-04 02:26:44.691 Video timing method: SGI OpenGL
2006-08-04 02:27:21.585 WriteAudio: buffer underrun
2006-08-04 02:27:25.258 NVP: Timed out waiting for free video buffers.
2006-08-04 02:27:28.458 NVP: Timed out waiting for free video buffers.
2006-08-04 02:27:31.658 NVP: Timed out waiting for free video buffers.
2006-08-04 02:27:34.882 NVP: Timed out waiting for free video buffers.
2006-08-04 02:27:38.082 NVP: Timed out waiting for free video buffers.
2006-08-04 02:27:41.282 NVP: Timed out waiting for free video buffers.
2006-08-04 02:27:44.506 NVP: Timed out waiting for free video buffers.
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Old 11-04-06, 05:51 PM   #17
pest_789
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Default Re: HDTV (1920x1080) video + nvidia + mythtv = Frustration

I read somewhere else on the forum that the new issue you describe is a bug in the current version of the drivers. I've gone ahead and installed the 9625 beta drivers and now I only get the top half of the screen in 1080i, as if the image were doubled in height. Things are still flickering like it's interlaced, though.

GRRRRR!

It sure would be nice if this crap got tested before release.
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Old 11-04-06, 06:14 PM   #18
pest_789
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Default Re: HDTV (1920x1080) video + nvidia + mythtv = Frustration

I just gave up in disgust and did the old 'apt-get install nvidia-glx'.

Now with the same xorg.conf that a few minutes ago gave me only half a picture, I get a perfect desktop, but I'm back to Xorg at 100% cpu any time I try to play a video in myth.

I also just tried installing some of the older drivers out of the archive for fun and found that even something as new as 8756 won't compile the kernel driver on edgy.

It'd be SO nice to get a release that has both of these bugs fixed AT THE SAME TIME.

I've been using an HTPC in one form or another since 1999 and have seen the same bugs get killed and then re-introduced into drivers from both nvidia and ati all along the way. Is it that hard to keep the code-base clean?

These drivers are getting so complex, they should adopt a versioning scheme like the kernel and FREEZE FEATURES on say, the 8xxx series and JUST fix bugs. Then when they introduce new features, start a 9xxx series to break stuff in so that those of us that don't need the new crap can just have drivers that get MORE stable instead of constantly searching for a magic release that only has bugs that don't break the specific things we need.

Its looking like there's no version in existence right now that will give 1080i without breaking myth playback that will compile on edgy.
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