Messages in this thread | | | Date | Tue, 16 Nov 2004 00:02:49 +0100 | From | David Weinehall <> | Subject | Re: [patch] Fix GDT re-load on ACPI resume |
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On Mon, Nov 15, 2004 at 03:35:14PM -0500, Nickolai Zeldovich wrote: > 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 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. > > This simple patch adds the 0x66 prefix to lgdt, which forces it to load > all 32 bits of the GDT base address, thereby removing any restrictions on > where the GDT can be placed in memory. This makes ACPI resume work for me > on a Thinkpad T40 laptop.
Sadly doesn't work for me. ACPI resume broke for me with 2.6.10-rc1-bk15 (possibly 14, but that one didn't compile), and this patch does not fix it.
Regards: David Weinehall -- /) David Weinehall <tao@acc.umu.se> /) Northern lights wander (\ // Maintainer of the v2.0 kernel // Dance across the winter sky // \) http://www.acc.umu.se/~tao/ (/ Full colour fire (/ - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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