Hi, i finally figured out why dri3/present failed so miserably with my neuro-science application, which relies on OML_sync_control and INTEL_swap_events extensively and worked nicely under dri2 for years.
I found so far two bugs in the x-server and 3 bugs in mesas dri/present backend. I'll send out the mesa patches with fixes separately. The following two patches fix the x-server part for me. First one only caused pain during debugging - a bug in the DebugPresent macros, causing server crash on logout, closing of unredirected fullscreen windows, or toggling composition on/off whenever the debug macros were compiled in. The second patch fixes nouveau's massive tearing and various OML_sync_control related failures caused by lack of vsynced pageflips. The problem doesn't happen on intel, at least with the tested ddx versions, because intel-ddx (as of 2.99.914) never reports AsyncFlipCapability on my Intel HD Ironlake and Intel HD 4000 IvyBridge, so possibly a bug in the intel driver which cancels out with the server bug? These patches were tested to apply cleanly on master and on top of the 1.16.2 branch. They were tested on Intel HD, Intel HD-4000 and with nouveau on a NVidia gpu on top of 1.16.2. Could these be applied to 1.16 and later? thanks, -mario _______________________________________________ [email protected]: X.Org development Archives: http://lists.x.org/archives/xorg-devel Info: http://lists.x.org/mailman/listinfo/xorg-devel
