[mythtv-users] How to get interlaced PAL TV out on Nvidia?

Andrew M. Bishop amb at gedanken.demon.co.uk
Sun Nov 9 09:47:07 EST 2003


Clyde Stubbs <clyde at htsoft.com> writes:

> I'm trying to get Mythtv going on an Nvidia nforce2 motherboard,
> using the on-board GeForce4 MX video. It works fine to an LCD monitor,
> but I cannot get it to display on my TV. XFree86 with either the nv
> or the binary Nvidia driver doesn't seem to want to know about horizontal
> scan rates below about 30kHz.
> 
> However, I know the video hardware will output PAL interlaced 50Hz/15Khz
> or thereabouts video, because on bootup, the text mode display appears
> on the TV just fine. But if I setup an interlaced modeline in XF86Config
> with a horizontal scan rate less than 30kHz, X complains:

I use the NVidia binary drivers and have the following entries in the
XF86Config config file.  Initially I had the 60 Hz PAL settings, but I
scaled down the scan rates to get the 50 Hz version.


Section "Monitor"
	HorizSync	15-50
	VertRefresh	50-60

	# PAL 60
	ModeLine "640x480x60" 25.2     640 656 752 800   480 490 492 525
	ModeLine "800x600x60" 39.7901  800 840 968 1056  600 601 605 628

	# PAL 50
	ModeLine "640x480x50" 21.0     640 656 752 800   480 490 492 525
	ModeLine "800x600x50" 33.1584  800 840 968 1056  600 601 605 628
EndSection

Section "Screen"
	Identifier	"Default Screen"
	Device		"Generic Device"
	Monitor		"Generic Monitor"
#	Option		"NoLogo" "true"
#	Option		"NoBandWidthTest" "true"
	Option		"TVStandard" "PAL-I"
	Option		"ConnectedMonitor" "TV"
	Option		"TVOutFormat" "COMPOSITE"
	Option		"AllowMouseOpenFail" "true"
	DefaultDepth	24
	SubSection "Display"
		Depth		24
		Modes		"800x600x50" "640x480x50"
	EndSubSection
EndSection

-- 
Andrew.
----------------------------------------------------------------------
Andrew M. Bishop                             amb at gedanken.demon.co.uk
                                      http://www.gedanken.demon.co.uk/


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