Some accelerated drivers may cause the machine to lockup when starting up the server on some versions of SVR4.0. The problem seems to be related to the kernel checking for the presence of physical memory when mmaping /dev/pmem. This can cause problems when mapping memory mapped registers. This is known to be a problem with the MGA driver in the SVGA server. Some other drivers may be affected too. We currently have no workaround for this.
$XFree86: xc/programs/Xserver/hw/xfree86/doc/sgml/SVR4.sgml,v 3.13.2.1 1997/06/01 12:33:36 dawes Exp $ $XConsortium: SVR4.sgml /main/8 1996/10/27 11:06:06 kaleb $
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