Re: image dump of hidden X session

From: Kasper Dupont (kasperd_at_daimi.au.dk)
Date: 08/12/03 

Date: Tue, 12 Aug 2003 10:00:48 +0200

Kasper Dupont wrote:
>
> If that is not what is happening to
> you my next guess would be, that the reason is, that something goes
> wrong when attempting to take a shot of a display while X is not on
> the active VC.

That is in fact the reason. I tried this command while X was on
the active VC, and while it was not:
   xwd -display :0 -root >/tmp/xwd.$(date +%s)

I tried on three different computers. In all three cases, the
result when X was not active was that the last few rows of pixels
on the screen was repeated over and over again each time seperated
by one row of junk.

I found that when X was not the active VC, grabing the screenshot
took less time (easy to hear the beeps were faster). And in one of
the cases I tried counting the rows of pixels. Instead of the
correct 1024x768 pixels screen, I got the last 15 rows of pixels
followed by one row of junk, all of which was repeated 48 times.

I have tried with XFree86-4.0.1 and XFree86-4.3.0. I don't know if
earlier versions also suffer from this problem. 

-- 
Kasper Dupont -- der bruger for meget tid paa usenet.
For sending spam use mailto:aaarep@daimi.au.dk
Their business was zero and it was shrinking.

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