From: Greg Langham (greg_at_ubh.com)
Date: Sat Nov 24 2001 - 22:09:57 EST
Chris -
I have the same VP201 monitor and an A22p. I don't think the A21p supports
the DVI port. However, my A22p would *not* drive the vp201 monitor. I
purchased an Appian Hurricane PCI video card (actually a dual head card)
with a DVI output and put it in the Thinkpad Dock. The VP201 works perfectly
with it. I then attached a Dell 1280x1024 flat panel to the DVI port on the
thinkpad dock to give me a dual-flat panel setup.
This setup works fine in both W2K and Windows XP. The only caveat is to
uninstall PC Anywhere before start messing with video drivers (as I learned
the hard way!)
Greg
-----Original Message-----
From: Chris Ryland [mailto:cpr_at_emsoftware.com]
Sent: Friday, November 23, 2001 9:24 PM
To: thinkpad_at_cs.utk.edu
Subject: A21p vs. Viewsonic VP201
Someone recently said he'd gotten the a21p (or similar) working with the DVI
port with a Viewsonic VP230.
I just purchased a VP201 display (1600x1200, 20.1") to work with my A21p
(W2K) and am having troubles.
It works in analog mode, but with a lot of noise (wavy vertical lines and
"rivers" of interference).
It doesn't work at all from the A21p's port expander's DVI port. I'm almost
positive the monitor works, but I don't have another digital monitor to test
the A21p's DVI port against. How would I debug this? Are there settings that
aren't obvious? Should the DVI port just work when something's plugged in?
In the display control panel, the laptop claims it sees the flat panel
display when plugged in the DVI port. But nothing happens with it.
To make sure it's not the monitor nor the cable, I plugged into my Apple
Powerbook Ti (previous generation, not the latest), and it works flawlessly
in analog mode: locked in with perfect sharpness and no noise--a joy to
behold.
That strongly suggests that the A21p analog video port is just plain noisy.
Is that true, in most people's experience?
(All this is running a60Hz, the only refresh rate the that VP201 supports at
full resolution.)
-- Cheers! Chris Ryland Em Software, Inc. www.emsoftware.com
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