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| NVIDIA TV out configuration http://forum.linhes.org/viewtopic.php?f=14&t=4011 |
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| Author: | prometheus [ Wed Mar 30, 2005 12:51 pm ] |
| Post subject: | NVIDIA TV out configuration |
I am trying to configure the TVout for a NVIDIA GeForce2 Ti (philips chipset) and am having some trouble. The main problem is that I can see the screen fine, but only a small portion of the screen is visible at a time (i.e. I can scroll around to different parts of the screen with the mouse, but not everything is visable). I have modified the XFree86Config-4 file to no avail. The BIOS splash screen appears perfectly and I have used this card in windows with a TVTool for configuration, so I know it possible, just don't know how to get there with linux (the superior choice). Also, is there a graphical or command-line utility for configuration of NVIDIA cards? Any help would be appreciated greatly!! |
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| Author: | Xsecrets [ Wed Mar 30, 2005 2:39 pm ] |
| Post subject: | |
there is a tool called nvtv for tweaking the older nvidia cards, but your problem is that for some reason your virtual screen size is larger than your actual screen size. look over the log file at /var/log/Xsomething.log I can never remember the exact name just use tab completion X<tab> and you will see what I am talking about. something is wrong with your X configuration. Make sure you are not trying to use a resolution higher than 800x600 as I don't think the linux drivers support the higher resolution on those old cards. |
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| Author: | Greg Frost [ Wed Mar 30, 2005 5:43 pm ] |
| Post subject: | |
If you remove the "1024x768" settings from /etc/X11/XF86config-4, it should come up in 800x600 by default which will prevent the scrolling problem. Then use nvtv to adjust the overscan. I think someone wrote something about this on the wiki. |
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| Author: | prometheus [ Thu Mar 31, 2005 1:59 pm ] |
| Post subject: | |
Thanks for the help. Had to remove the 800x600 mode from the XFree86Config-4 file. Had a virtual desktop of 800x600, but only displayed correctly when I would CTRL-ALT-+ to 640x480. Now if I can just figure out how to use nvtv to make the output fit the TV! Is there a primer that describes all of these settings? Thanks Greg & Secrets! |
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| Author: | Greg Frost [ Fri Apr 01, 2005 2:48 am ] |
| Post subject: | |
nvtv actually has a graphical interface. As root run nvtvd (the daemon must be running in the background for a non root user to do nvtv settings) and then as the mythtv user from an xterm run nvtv with no arguments and it will bring up the gui. The gui lets you work out what looks best on your screen and then you need to work out how to set it up in the same way from the command line. I actually needed to patch the source code to get it to adjust the horizontal position from a command line argument (to centre the display on my tv). If you really want to get into getting a good tvout, I would download the source for nvtv and have a look at some of the documentation. Also setting mythtv to use bob deinterlace in the Playback settings is a must. As a side note I seem to recall having to remove the setuid bit from the nvtv exectuable to get it to open the Xwindows Display, so if you get an error running it as mythtv this may be your problem. I think the setuid thing is a trick to getting around the need to have nvtvd running in the background (if you know the command line args and it doesnt need to open an xwindows display). I have a Geforce2-MX400 and am quite happy with the tv out quality, but I run mine at 800x600. I don't know why you had a problem with that. |
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| Author: | Greg Frost [ Fri Apr 01, 2005 4:53 pm ] |
| Post subject: | |
prometheus private message wrote: Thanks for the tips Greg! I have adjusted the parameters with the GUI and can output them to stdout. Then do I call nvtv from a startup script (i.e. create a SXX in a rcX.d or inittab) in order to configure those setting everytime?
I will look up how to set the bob interlace setting as you mentioned. Hunter Leland I dont think you can set arbitary overscan from the command line without modifying the source code. You can however select from the list of defined overscan parameters shown on one of the gui pages. you run something like nvtv -t -S PAL -r 800,600 -s Normal the -s Normal bit is the bit that specifies the overscan, You can put this command in one of the files that is in ~mythtv/.fluxbox. just look for where it starts the KnoppmythRun script |
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