Adam K Kirchhoff wrote: > Nicolai Haehnle wrote: > >> Hi everybody, >> >> I once again tripped upon an R300 lockup (possibly the same one that >> everybody's been talking about) and spent the last one and half days >> chasing it down. >> >> It turns out that writing the vertex buffer age to scratch registers >> (the ones that are written back to main memory) during a 3D sequence >> is a bad idea. Apparently, this confuses the memory controller so >> much that some part of the engine locks up hard. >> >> The attached patch.out-of-loop-dispatch-age fixes this, at least for me. >> >> The attached patch.remove-userspace-pacifiers removes additional >> unnecessary emission of the pacifier sequence from the userspace >> driver. Userspace isn't supposed to emit this sequence anyway. >> >> Could everybody please test whether a) the first patch really does >> fix the lockups people are seeing and >> b) whether combining both the first and the second patch causes any >> regressions. >> >> If everything's fine with these patches, I'm going to commit them in >> a few days or so. >> >> cu, >> Nicolai >> > > A) The first patch may help a little, but definitely doesn't eliminate > the lockups. > > B) Huge regression. With both patches I get an immediate lockup when > launching glxgears (before the > window is even drawn). > > Adam > Funny enough, two days ago, I played vegastrike for litterally _hours_ with my Radeon 9800 Pro, both patches applied, I restarted the game a couple times and I could not get it to lockup. However, the day after, I could not even start the game without causing a lockup. Looks like you did something good, keep up the great work.
Keep up the good work, I'm sure you guys will figure it out, Jonathan
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