As I think I mentioned in my original email, when I patched the driver to limit the size to 256M, it did prevent the crash. I'm somewhat ignorant of how PCI devices are handled by X and the OS. but I expected it should be use the smaller of RADEON_CONFIG_MEMSIZE and the BAR (although if you know the BAR is never too big, that would be a good simplification). Thanks, Robert <div>On 7/29/07, Daniel Stone <<a href="mailto:daniel@fooishbar.org">daniel@fooishbar.org</a>> wrote:<blockquote class="gmail_quote" style="border-left: 1px solid rgb(204, 204, 204); margin: 0pt 0pt 0pt 0.8ex; padding-left: 1ex;"> On Sun, Jul 29, 2007 at 10:45:41AM -0400, Alex Deucher wrote: > On 7/28/07, Robert Tate <<a href="mailto:wrtate@users.sourceforge.net">wrtate@users.sourceforge.net</a>> wrote: > > The gzipped radeondumps are attached. Also with respect to the crashing problem, I forgot to mention that the line "avivo->fb_size = INREG(RADEON_CONFIG_MEMSIZE);" set fb_size to 536870912 (512M), but fglrx only reports 256M. > > I think the max pci BAR size is 256 MB, so you'd need to clip the > videoram to 256 MB. the additional vram is GPU only. Try adding a > check to the driver to clip vram to 256 MB. Well, it should really be keying off the size of the BAR, not off RADEON_CONFIG_MEMSIZE. Sorry. Cheers, Daniel -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.6 (GNU/Linux) iD8DBQFGrQfbUVYB1rKAgJQRAuEMAJ94idUvw1ELX60bqoEQKpM/IDs+EACglDFy 3Hl6l8gtlR0KasymAElXcN0= =oUBw -----END PGP SIGNATURE----- </blockquote></div>