https://bugs.freedesktop.org/show_bug.cgi?id=98856
Bug ID: 98856 Summary: Dirt: Showdown broken graphics Product: Mesa Version: git Hardware: x86-64 (AMD64) OS: Linux (All) Status: NEW Severity: normal Priority: medium Component: Drivers/Gallium/radeonsi Assignee: dri-devel@lists.freedesktop.org Reporter: gr.muench@gmail.com QA Contact: dri-devel@lists.freedesktop.org
For about 4 weeks the game has polygon distortion especially on the Nevada map. Its not on every map but it can be seen with the ingame benchmark.
Im on: Radeon HD 7970 OpenGL renderer string: Gallium 0.4 on AMD TAHITI (DRM 2.48.0 / 4.9.0-rc4-gbc33b0c, LLVM 4.0.0) OpenGL core profile version string: 4.5 (Core Profile) Mesa 13.1.0-devel (git-b27be18)
https://bugs.freedesktop.org/show_bug.cgi?id=98856
--- Comment #1 from Samuel Pitoiset samuel.pitoiset@gmail.com --- Could you provide an apitrace that reproduces the issue?
https://bugs.freedesktop.org/show_bug.cgi?id=98856
Gregor Münch gr.muench@gmail.com changed:
What |Removed |Added ---------------------------------------------------------------------------- Summary|Dirt: Showdown broken |[Regression, SI] DIRT: |graphics |Showdown broken graphics
https://bugs.freedesktop.org/show_bug.cgi?id=98856
--- Comment #2 from Gregor Münch gr.muench@gmail.com --- I tried getting this to work but I dont get any output file.
DEBUGGER="apitrace trace" steam steam://rungameid/201700 What am Im doing wrong here?
I installed: apitrace lib32-apitrace
If you want to do a regression testing, this somewhat broke arround here: https://cgit.freedesktop.org/mesa/mesa/commit/?id=74e39de9324d2d2333cda6adca...
https://bugs.freedesktop.org/show_bug.cgi?id=98856
--- Comment #3 from Samuel Pitoiset samuel.pitoiset@gmail.com --- Does reverting that commit fix the issue?
https://bugs.freedesktop.org/show_bug.cgi?id=98856
--- Comment #4 from Gregor Münch gr.muench@gmail.com --- I managed to get a trace. Hope it works for you.
https://drive.google.com/open?id=0B5KUmMDAwP-iUFNDdEpkd2xUMXc
https://bugs.freedesktop.org/show_bug.cgi?id=98856
--- Comment #5 from Gregor Münch gr.muench@gmail.com --- (In reply to Samuel Pitoiset from comment #3)
Does reverting that commit fix the issue?
I can't test (I would do if someone could show me how). I do weekly Mesa builds and Im quite sure it broke in the week when this commit appeared.
https://bugs.freedesktop.org/show_bug.cgi?id=98856
--- Comment #6 from Gregor Münch gr.muench@gmail.com --- Problem is still there as of mesa git from Friday. Also, the trying replaying my trace hangs the GPU.
https://bugs.freedesktop.org/show_bug.cgi?id=98856
--- Comment #7 from Gregor Münch gr.muench@gmail.com --- I finally was able to start bisecting this, I was going back to Mesa from early October but couldnt find the culprit. I used PKGBUILD provided from here: https://aur.archlinux.org/packages/lib32-mesa-git/ Then I followed these instructions: https://wiki.archlinux.org/index.php/Arch_User_Repository#Installing_package... https://wiki.archlinux.org/index.php/Bisecting_bugs
I guess since the executable name of the game is dirt.i386 so bisecting the 32bit package is the right one?
Im a bit lost here, I will try older Kernel and libdrm but after that Im running out of ideas what could caused this, any other ideas would be appreciated.
BTW, judging from the screenshots in https://bugs.freedesktop.org/show_bug.cgi?id=99136 it looks this is the same problem. Its interesting to see that enabling a minor heavy graphic option causes such crazy graphical corruption. He enables blood effects and in Dirt you have to set Crowd from OFF to LOW or higher. While ULTRA option makes the problem even worse.
Fun Fact: I tested Tomb Raider Benchmark, and the average FPS on went from 48fps with Mesa from October to 58fps with current Mesa git. So really good job on this!
https://bugs.freedesktop.org/show_bug.cgi?id=98856
Gregor Münch gr.muench@gmail.com changed:
What |Removed |Added ---------------------------------------------------------------------------- Summary|[Regression, SI] DIRT: |DIRT: Showdown broken |Showdown broken graphics |graphics with Mesa built | |with -Ofast
https://bugs.freedesktop.org/show_bug.cgi?id=98856
--- Comment #8 from Gregor Münch gr.muench@gmail.com --- Created attachment 130076 --> https://bugs.freedesktop.org/attachment.cgi?id=130076&action=edit garbled graphics #1
Found the problem. Seems like using -Ofast wasnt a good idea. Using -03 everything works as it should. Still attaching screenshot showing the problem in case it is useful to others.
https://bugs.freedesktop.org/show_bug.cgi?id=98856
Vedran Miletić vedran@miletic.net changed:
What |Removed |Added ---------------------------------------------------------------------------- Blocks| |77449
Referenced Bugs:
https://bugs.freedesktop.org/show_bug.cgi?id=77449 [Bug 77449] Tracker bug for all bugs related to Steam titles
https://bugs.freedesktop.org/show_bug.cgi?id=98856
--- Comment #9 from Gregor Münch gr.muench@gmail.com --- Still the same with -Ofast.
https://bugs.freedesktop.org/show_bug.cgi?id=98856
Timothy Arceri t_arceri@yahoo.com.au changed:
What |Removed |Added ---------------------------------------------------------------------------- Status|NEW |RESOLVED Resolution|--- |NOTABUG
--- Comment #10 from Timothy Arceri t_arceri@yahoo.com.au --- Ofast disregards strict standards compliance. -Ofast enables all -O3 optimizations. It also enables optimizations that are not valid for all standard-compliant programs.
In other words don't use it with Mesa :)
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