Two examples, two pictures. From supertuxkart 0.8.2-beta and also happens in Stacking game. http://sourceforge.net/projects/supertuxkart/files/SuperTuxKart/0.8.2-beta/ http://www.gog.com/game/stacking Hardware is Athlon 5350 R3 Kabini, mesa and llvm from today git. A tried to go down to mesa 10.1/llvm3.4 but this had never work right, so issue is there too.
Created attachment 111065 [details] stk screenshot BTW for STK i first need 'radeonsi: force NaNs to 0' patch, otherwise when just enable 'Advanced pipeline' in game settings nearly everything is completely black. So just to mention that, but even without that patch those dashed (sky)lines are visible. https://freedesktop.org/patch/38706/
Created attachment 111066 [details] stacking screenshot For Stacking game, it render otherwise fine by default (no NaNs patch needed), just those dashed lines whanever OGL/Shaders/Light.fxo is used... that happens mainly when lighting appear from windows or in some specific more lightned up places. I might upload apitrace from that one if needed, but i think it is the same cause as in opensource SupertuxKart 0.8.2-beta game.
Checked llvmpipe and fglrx, both worked fine... so yeah it is radeonsi driver bug.
This Michel's llvm patch fixes this bug: http://lists.cs.uiuc.edu/pipermail/llvm-commits/Week-of-Mon-20150119/254035.html
*** This bug has been marked as a duplicate of bug 88642 ***
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