Try as I might, I couldn't get it to accept that modeline for my x resolution. Are you sure that your x resolution is really 768x576?
Could you pm me your XF86config-4 file so I can see what I am doing wrong. Are you using the install-nvidia-7<tab> driver?

I used the standard "nv" driver that doesn't have any 3d-acceleration. It worked just fine with that one. The only thing is that the screen gets trashed then you CTRL-ALT-Fx to a console and/or back, but you can always open an xterm...

Then I decided to try the "nvidia" accelerated driver (NVIDIA-Linux-x86-1.0-7676-pkg1.run) and by now I regret it ;-) The CRT works fine, acceleration is there, but I can't get the TV-out to work with that driver. Using nvtv trashes the screens and crashed X. Using the "Option"s in the XF86Config-4 I will only get a picture on ONE of the displays (the one that is plugged in when I boot up) and messages like "Screens found, but none have a usable configuration" or the TV has a totally scrambled picture.

I tried with or w/o twinview, with 2 screen-entries, read about 30 HowTos and forum posts and edited the config like mad. For a 50Hz modeline I used some I found on the net, one from the GTF-calculator and I ripped the settings from my (working) NVTV-mode - nothing. I even read the nvidia-driver readme and tried the included sample config, but still it won't work...

I'm pretty desperate by now ;-)
Guess I'll need to switch back to no-accel I guess....

I'll try out the old config and pm it to you when I have it working...

I am using the nvidia driver installed using the command install-nvidia-7<tab>. No probs with tv out, although it looks terrible until I use nvtv to set it to my 800x576 setup (i.e. if I switch to a console ctrl-alt-f1 and then back to X alt-f7, the picture is there but looks terrible. running nvtv fixes it).

I'll give that gtf modeline a go using the nv driver and see if I have any more luck.

EDIT: Thats it. The nv driver allows me to use 768x576 and even an 800x576 modeline that I found and modified somewhere, but the nvidia driver rejects those modelines.

I'll need to do some testing and see what the performance hit is using the nv driver rather than the nvidia driver. Im suspicious that it wont be that bad with an old card like the geforce2.

Same here. I think the whole TV- problem is with the nvidia driver rejecting the modelines, because you can get a picture on the TV, but the timings just aren't right...



With 2D it doesn't matter, but I wasn't even able to play Tuxracer ;-) I had about 2-5 fps... You can test it yourself in MythTV->Games->Tuxracer.

Anyways. I crashed my system when I dropped the keyboard. Don't know which keys I "pressed", but I had to reset and it can't mount /root now... I'll probably now go an shoot myself ;-)

There are lots of people on the forum suggesting that the nvidia driver boosts performance.
Don't do that. With all you have learned you'll have a clean install runnning in a flash.

I won't ;-)
fsck couldn't save me this time...

Anyways I'm interested in your setup. What modeline did you use? You're a PAL-pal too right?

Ill try and remember to get it for you tonight (yes I'm PAL (DVB))

I found this (and not much else) by searching google for "800x576 modeline"

You can't use interlaced modelines with geforce2 cards (as far as I am aware), so I just removed the interlace and doubled the horizontal scan frequency to get:

I use:

"Modeline "768x576" 28.46 768 784 864 960 576 577 580 593 -HSync +Vsync" (50Hz PAL)

and

"nvtv -t -r 768,576 -s Normal -S PAL -C SVIDEO --set TVhoffset:6 "

now with the patched and edited nvtv. I adjusted the TFT to the mode and it looks ok on both screens.

I think we can close this thread down now.
If someone ever happens to find a running configuration with the "nvidia" accelerated driver and tv out on a GF2MX, let me know.

No suggestion, it's a stone cold fact. The performance of the nvidia driver is far superior to the nv driver for video output using the Xv extension and with far less CPU load. Even though it's "only 2D" the driver still takes much better advantage of the various hardware accelerations available to provide smooth video playback with low CPU overhead.

It's really day and night.

Does the "enable xv controls" have anything to do with whether or not myth uses the xv extensions for rendering the video? Or is using xv for playback enabled some other way? Or is it something that doesent need enabling, it just happens?

I'm curious because I havent seen much of a performance boost (if any) by using the nvidia driver over the nv driver with my Geforce2 card.

Wow. sounds tempting to give it a try again ;-)
I didn't do any measurements. I only tried running some 3D application and that was about 10+ times as fast as with the "nv" driver...

Now after doing some testing I again decided to switch to the "nv" driver, because with the "nvidia" driver tv-out won't work and it always blocked my SOFTWARE_SUSPEND_2 setup...

My testing of the impact on CPU usage suggests that the benefit obtained by using the nvidia driver with the geforce2 card is fairly minor anyway. And it would be nice in PAL land to be able to use a 576 line modeline (which the nv driver allows, but the nvidia driver seems not to).