Created attachment 26165 [details] [review] Patch for SIGSEGV when no kernel-side DRM is present The nouveau driver (from git on 13/04/2009) experienced SIGSEGV when no kernel-side DRM is present. The component version: xserver: 1.5.3 libdrm: 2.4.9 xf86-video-nouveau: git from 13/04/2009 The problem was narrowed down to nv_driver.c:NVMapMemSW() - the function declares 'struct nouveau_device', which in fact, should be 'struct nouveau_device_priv' for DRM related functions to work properly. The crashes were related to the accesses to 'mm_enabled' field of 'struct nouveau_device_priv', which points to a garbage when only 'struct nouveau_device' declared. Attached patch (against git from 13/04/2009) solved the problem.
Nowadays Nouveau cannot work without DRM, since it uses the memory management (GEM+TTM) even in NoAccel mode. Non-DRM mode is gone by commit http://cgit.freedesktop.org/nouveau/xf86-video-nouveau/commit/?id=f8ac9e35bd20391f923c5c5ccc509251ea23a4c5 Therefore closing this report, thanks.
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