I've applied Nickolai's patch -- thanks for the ping. -Len
On Fri, 2005-04-08 at 12:14, Juerg Billeter wrote: > Hi > > This patch - based on > http://marc.theaimsgroup.com/?l=linux-kernel&m=110055503031009&w=2 - > makes ACPI S3 wakeup work for me on a ThinkPad T40p laptop with a SMP > kernel. Without it only UP kernels work. I've been using the patch for > three months now without any issues. > > The ACPI resume code currently uses a real-mode 16-bit lgdt > instruction > to reload the GDT. This only restores the lower 24 bits of the GDT > base > address. In recent SMP kernels, the GDT seems to have moved out of > the > lower 16 megs, thereby causing the ACPI resume to fail -- an invalid > GDT > was being loaded. > > Regards, > > Juerg > > -- > Signed-off-by: Juerg Billeter <[EMAIL PROTECTED]> > > diff -uNr linux-2.6.10.orig/arch/i386/kernel/acpi/wakeup.S > linux-2.6.10/arch/i386/kernel/acpi/wakeup.S > --- linux-2.6.10.orig/arch/i386/kernel/acpi/wakeup.S 2004-12-24 > 22:34:26.000000000 +0100 > +++ linux-2.6.10/arch/i386/kernel/acpi/wakeup.S 2005-01-08 > 23:34:38.551471486 +0100 > @@ -74,8 +74,9 @@ > movw %ax,%fs > movw $0x0e00 + 'i', %fs:(0x12) > > - # need a gdt > - lgdt real_save_gdt - wakeup_code > + # need a gdt -- use lgdtl to force 32-bit operands, in case > + # the GDT is located past 16 megabytes > + lgdtl real_save_gdt - wakeup_code > > movl real_save_cr0 - wakeup_code, %eax > movl %eax, %cr0 > > > > - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [EMAIL PROTECTED] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
