The game is available on Steam and needs Wine to run. The main menu and all the objects in the game appear transparently, see this screenshot for comparison (images on the right show the correct behaviour, images on the left is the current state): http://imgur.com/aDhYehq The problem doesn't occur with the binary Nvidia drivers (340.76). Regression introduced by commit 9e94b87b6012450d714edc6d0c46b15a89d5ce61 Author: Ilia Mirkin <imirkin@alum.mit.edu> Date: Thu Jan 1 01:01:13 2015 -0500 nv50/ir: fold MAD when one of the multiplicands is const Fold MAD dst, src0, immed, src2 (or src0/immed swapped) when - immed = 0 -> MOV dst, src2 - immed = +/- 1 -> ADD dst, src0, src2 These types of MAD patterns were observed in some st/nine shaders. Reverting the commit on current git fixes the problem for me. Trace file generated by apitrace: https://drive.google.com/open?id=0B-tTbLKBl-tObmNTbmZLV08xMzA&authuser=0 To reproduce the problem in the demo version you need Wine (preferably the latest development version) and a Steam account. The game needs native d3dx9_36 ('winetricks d3dx9_36'). Fedora 22 32-bit Mesa 10.6-branchpoint-676-g7de8569 VGA compatible controller: NVIDIA Corporation G92 [GeForce GTS 250] (rev a2) (prog-if 00 [VGA controller]) Kernel 4.0.5-300.fc22.i686+PAE xorg-x11-server-Xorg-1.17.2-1.fc22.i686
The trace starts working when applying http://patchwork.freedesktop.org/patch/53049/ Note that the bisected commit merely enables the code fixed by the above to operate on the shaders in question rather than actually having a problem by itself. The resulting code ended up as "b - a" instead of "a - b".
Fix pushed. If this trace still gives you issues, feel free to reopen. commit ad62ec8316a926682958e7ab52639992867c3755 Author: Ilia Mirkin <imirkin@alum.mit.edu> Date: Fri Jun 26 15:01:22 2015 -0400 nv50/ir: propagate modifier to right arg when const-folding mad An immediate has to be the second arg of an ADD operation. However we were mistakenly propagating the modifier of the non-folded value to the folded immediate argument. Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=91117 Signed-off-by: Ilia Mirkin <imirkin@alum.mit.edu> Cc: "10.5 10.6" <mesa-stable@lists.freedesktop.org>
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