#77 G400: Segfault on Alpha system

[Christoph Reichenbach]

I'm running utah-glx on an Alpha machine (using the Irongate chipset to talk to the G400 in the AGP slot). When hw-accelleration is enabled, X segfaults in mgawarp.c, line 224 (warpLoadPipeManual()), which is probably related to MGAMMIOBase being NULL there. This happens both without agpgart if mga_dma=0, and with it if mga_dma is in {0,3} (I didn't bother to test any other setups). This bug is at least two months old (that's when it failed for me for the first time- sorry for not reporting this sooner).