Created attachment 116944 [details] trace generated by apitrace The game runs natively on Linux. When Mesa was compiled with DRI3 support the game segfaults when starting and I get this in the terminal: Psychonauts: nv50/nv50_miptree.c:132: nv50_mt_choose_storage_type: Assertion `ms == 0' failed. The game starts properly if I disable DRI3 at runtime (LIBGL_DRI3_DISABLE=1) The problem is present since commit 241e7289f25a342a457952b9b0e539c2f0b81d99 Author: Maarten Lankhorst <maarten.lankhorst@ubuntu.com> Date: Wed Oct 22 11:04:16 2014 +0200 enable dri3 support without glamor When replaying the trace with glretrace the message about the assertion is not present, but glretrace segfaults with signal 11. Fedora 22 32-bit xorg-x11-server-Xorg-1.17.2-1.fc22.i686 Kernel 4.0.6-300.fc22.i686+PAE VGA compatible controller: NVIDIA Corporation G92 [GeForce GTS 250] (rev a2) (prog-if 00 [VGA controller]) libdrm-2.4.62-1-g676c806 xf86-video-nouveau-1.0.11-23-gdfd827c Mesa 10.6-branchpoint-826-gff0a41b
Created attachment 116945 [details] XOrg.log
The assertion is regarding PIPE_BIND_SCANOUT + nr_samples != 0. I suspect this might be a dri st bug which only surfaces with the new mechanisms that dri3 enables.
Created attachment 116946 [details] backtrace from the game and glretrace
If you have a Steam account and Steam for Linux installed you can reproduce the segfault with these native Linux demos on Steam: - 'Running with Rifles' demo (note: I had to remove libstdc++.so.6 and libxcb.so.1 from ./lib). - Torchlight II demo (the game starts with default settings, you need to enable anti-aliasing in-game option and restart the game to reproduce this bug). All those games crash on start with >nv50/nv50_miptree.c:132: nv50_mt_choose_storage_type: Assertion `ms == 0' failed. when DRI3 is enabled.
Marek posted a patch for this at http://patchwork.freedesktop.org/patch/53843/
(In reply to Ilia Mirkin from comment #5) > Marek posted a patch for this at > http://patchwork.freedesktop.org/patch/53843/ The patch works and fixes the problem in all the affected games that I know of. Thank you both for your help fixing this bug.
Patch committed, marking the bug as fixed. http://cgit.freedesktop.org/mesa/mesa/commit/?id=6611f65047575054a38ce83ebfe0331e39e1774f
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