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TV Out - restricted to 60Hz, need 50Hz

Posted on 2006-04-26
Medium Priority
Last Modified: 2010-08-05
I'm trying to set up my IBM Thinkpad T43 for TV out.
All I get (on our aging TV set) is a blurry black and white image on the TV screen.
On a newer TV set the color is fine.

I blame the "Generic television" driver, which forces output at 60Hz: I'm on PAL here, at 50Hz. The new TV set probably accepts NTSC (60Hz) as well.
I tried fiddling around with all kinds of resulotions and frequesncies for display drivers, but no matter what I do, the TV driver's frequency can't be influenced.

Can anyone tell me wether I'm either right or wrong, and perhaps direct me to a suitable TV driver for PAL?
Question by:CRAK
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LVL 30

Expert Comment

by:Irwin Santos
ID: 16548452
If your IBM TV out is NTSC, then you need a NTSC -PAL converter.
LVL 13

Author Comment

ID: 16557043
The T43 supports both PAL and NTSC.
In the Fn + F7 menu (toggle for displays), I can define output to e.g. LCD and TV out at e.g. 800*600 for PAL. NTSC is another option.
Still... if I select PAL, the TV flickers for a sec, then I get an error message that the TV mode is not supported, and it seems to continue @ 60 Hz. I tried different resolutions: that's not causing the error.
I shouldn't need another piece of hardware to convert the signal!
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LVL 30

Expert Comment

by:Irwin Santos
ID: 16557733
got another monitor to attach too?
LVL 13

Accepted Solution

CRAK earned 0 total points
ID: 16557743
I found it!
The T43 has a Mobile Intel 915GM/GMS, 910GML Express Chipset Family-display adapter.
The Control Panel contains an icon "Intel GMA Driver for Mobile". With the TV attached, I can select "Television" in the Devices tab. I can set the resolution there and (!!): the TV system. It WAS set to a NTSC variant. Setting it to PAL-B (I will look into the correct variant) gave me a full coloured screen!
Prolem solved!
LVL 30

Expert Comment

by:Irwin Santos
ID: 16557839
cool!! that's good news..  perhaps you would like to close the question.  Happy Viewing!!

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