On Tue, 2012-09-04 at 12:07 +0100, James Turner wrote: > On 4 Sep 2012, at 11:43, Alasdair wrote: > > > Further research shows that for the b1900d & SenecaII, this problem goes > > way back to 2.6.0. It has only become apparent (in my case) for the > > c172p in recent git pulls. I will attempt to find exactly when, but I am > > having to learn git as I go :-( Since the c172p is my aircraft of > > choice, the problem has gone unnoticed up till now. > > I would be very cautious in your testing - from what Thorsten's already > indicated, you are /not/ looking at a stable issue. There's certainly > code-paths that bias it (wxradar apparently, and model complexity / texture > complexity in general), but changing OS / driver / FG version and having the > problem go away or re-appear doesn't conclusively indicate that a specific > change was made in those things, that is causal for the bug. > > In other words, changing your configuration (aircraft, rendering settings, > drivers, who knows) may push you back-and-forth over the line where the bug > occurs, but that doesn't tell us much about the real cause. > > Of course, testing is still worthwhile - it would be interesting to know if > anyone saw the issue with FG 2.4 - but again so much has changed in terms of > shaders complexity, that I fear this again might not prove anything. > > James > > Thanks for the words of wisdom, James, but I am still curious to determine when the problem began for me on the c172p. I don't think Fred's suggestion for git bisect will work because I have to bisect fg, sg and data and keep them in sync, so I reckon I will have to do the binary chop manually. This is really a labour of love & curiosity, cos all is ok on another more powerful m/c with nvidia graphics + 4 monitors.
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