Composite video from Compaq Armada e500 to Panasonic LCD TV TC-20LA1.

try messing with the screen resolution. You need both V and H frequencies to be correct. The lapotp may not be able to do both at the same time. Or you may be able to use the function key that controls the internal/external display switching to blank the lcd and make it work.

Have you looked at the output from the Armada with an oscilloscope???

On 4/8/2011 12:22 PM snipped-for-privacy@att.net spake thus:

And just how would you propose to interpret those results?

--
The current state of literacy in our advanced civilization:

   yo
   wassup
   nuttin
   wan2 hang
   k
   where
   here
   k
   l8tr
   by

- from Usenet (what's *that*?)

If there was, it wouldn't help you with linux. I'd post the question in a linux group.

If it were me, I'd google

But it might be effective to just compare the waveform while booting when it does work to the wavefrom after booting when it doesn't work.

I don't think the problem is interpretation. The problem is CONTROL under linux.

My foolproof method for sorting out something like this will make linux aficionados freak out in disgust, but here goes....

1. Temporaily install a Microsoft GUI operating system (Win95..Windows

7) including relevant driver software for the graphics card.

1. Attempt to get a decent picture on your TV with the above driver
2. Install powerstrip trial
   formatting link
3. Make tweaks as necessary using powerstrip

Then go here

--
Adrian C

Try changing the refresh rate or the display driver for the screen display. Seems like the OS is loading something that the tv doesn't understand.

Peter wrote in news:9498e99f-253d-464e-8876- snipped-for-privacy@r13g2000yqk.googlegroups.com:

y. =A0

With this in /etc/X11/xorg.conf the refresh rate is still 94 Hz.

Section "Monitor" ... VertRefresh 60.0 EndSection

Can VertRefresh be set on the laptop display; is it wired to 94 Hz?

I'll check with the scope as suggested by hrhofmann and mike and if necessary resort to the method of Adrian C.

Thanks to everyone, ... Peter E. peasthope at shaw.ca

There are now two photos from the screen of the storage scope on a server.

is the signal from the BIOS display. is the signal from XDM. Just to recapitulate, the BIOS display is visible on the Panasonic TV. The XDM display is not; as if not syncing. I've never checked a composite signal. Do these photos give any ideas?

By the way, I connected the scope lead to the center pin of the composite connector. Did not connect the shield of the scope lead and did not connect the shield of the composite connector. What is the best way to connect a scope to composite video? In case it helps, this scope can subtract two signals.

Thanks, ... Peter E.

gnal from

.. Peter E.

You must connect the shields, the waveforms on the scope are all noise.