On Wed, 2006-04-05 at 07:38, Luck, Tony wrote: > On Tue, Apr 04, 2006 at 01:45:04AM -0700, Andrew Morton wrote: > > - VGA on ia64 is broken - the screen comes up blank. But ia64 otherwise > > seems to work OK. I didn't have time to investigate. > > Broken in base 2.6.17-rc1 too :-( VGA comes up and prints a > few messages, and then goes wonky and dies. Comparing > what I _think_ I saw with the dmesg output, it appears to > die here: > The wild VGA comes from the patch which changed ioremap. Now ioremap would not remap memory to region 6 unless that memory is marked as EFI_MEMORY_UC by EFI. Unfortunately on the Tiger Machine, VGA ram base was marked as EFI_MEMORY_WB instead of EFI_MEMORY_UC... So you can see the problem disappear if change VGA_MAP_MEM to use ioremap_nocache. But I am not quite sure if we can fully trust EFI on this attribute. Zou Nan hai - : send the line "unsubscribe linux-ia64" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
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