Created attachment 135585 [details] example of incorrect rendering Hi, Mesa 17.2 and above incorrectly renders dust in hl2ep1, it looks like the screen is divided into four parts and only one or two of them are filled with the dust. I've checked 17.3.0~rc3, 17.2.5, they have this issue. 17.1.5 doesn't have it. I use Radeon 7750.
Actually it's caused by *absence* of one or more R600_DEBUG options. When I run the game with R600_DEBUG=forcedma,hyperz,llvm,precompile,sisched,sbcl,sbsafemath I have good rendering. Without it I have the described problem. I'll try to figure out which option fixes rendering.
I've tested other HL2 titles (HL2, EP2, Lost Coast), they all have this issue. But it can be workarounded by usage of sisched.
I have the same problem on R9 270x with Mesa 17.2.2
Thanks for the report. I cannot reproduce this on VI with latest Mesa and LLVM. Could you please (1) try with latest Mesa and LLVM (e.g. Padoka PPA if you're o on Ubuntu) and (2) provide the output of glxinfo?
I have checked mesa snapshot build against llvm6 and no more able to reproduce this error. Debian's 17.1.5 is linked against llvm4, while 17.2.5 is linked against llvm5, so it looks like llvm5 causes issues, but it's too big to bisect. I currently have no possibility to check 17.3 linked against llvm6 but if nobody does this I'll do it closer to x-mas.
Tried today 17.3.0 linked both against llvm 5.0 & 6.0. With 5.0 the issue persist, with 6.0 goes away. So at least it's not a Mesa issue.
It's unlikely a new version of LLVM 5 will be released. If you see the problem again with LLVM 6 or 7 fell free to reopen the bug.
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