On Mon, 2012-09-03 at 01:06 +0200, ThorstenB wrote:
> > On Sun, Sep 2, 2012 at 11:31 AM, Alasdair <ali...@btinternet.com> wrote:
> >> After git pull (sg,fg,fgdata) a couple of days ago, I was presented with a
> >> strange screen which I had not seen before. My regular was shown as a
> >> sub-screen in the bottom-left corner. Clicking the maximise widget restores
> >> full screen, but any click on a menu item returns me to this stupid screen.
> >> Is this infuriating behaviour deliberate, or has my graphics driver gone
> >> walk-about?
> >>
> >> https://dl.dropbox.com/u/15936159/fg_quarter-screen.png
> 
> Unfortunately a long standing issue. This affects ATI graphics cards 
> when running newer drivers. It can be "fixed" by reverting to an older 
> ATI driver (see link below). To me it looked like a genuine OSG or ATI 
> driver bug (the size of the graphics view port doesn't properly resize 
> to the size of the window), but it's likely triggered by something 
> "special" we're doing in FG, since other applications don't seem to have 
> this issue.
> 
> Also, it's timing-/sequence dependant: it only affects certain aircraft 
> (aircraft using wxradar, which changes/delays the OSG init sequence on 
> startup, are less likely to have the issue) - and for some people it 
> dis- and reappears with certain FG builds.
> 
> It would be really good if someone seeing the issue locally could 
> properly debug this - even if it means digging into OSG - since a larger 
> number of people are affected. I tried "remote debugging" this a while 
> ago, but gave up after being unable to narrow it down inside FG. Maybe 
> someone else has better luck.
> 
> For more see here:
> http://code.google.com/p/flightgear-bugs/issues/detail?id=385
> 
> cheers,
> Thorsten
> 
Thanks very much for the link, Thorsten, it is a good start. But strange
that this problem, should just appear without any driver change. But I
am using Debian SID, and update my system daily, so it could be
OS-related.
I will install UBUNTU and try the same build under  that OS.

regards,
Alasdair 


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