Re: [2.6.18-rc5-mm1 ACPI] Unknown exception code: 0xFFFFFFEA

Bjorn Helgaas
2006-09-05T16:18:59Z

On Sunday 03 September 2006 03:09, Mike Galbraith wrote:
> My single P4/HT box tossed the below on boot.
>
> ACPI Error (utglobal-0125): Unknown exception code: 0xFFFFFFEA [20060707]
> [<c1004089>] dump_trace+0x1d7/0x206
> [<c10040d2>] show_trace_log_lvl+0x1a/0x30
> [<c100484c>] show_trace+0x12/0x14
> [<c100496d>] dump_stack+0x19/0x1b
> [<c1229702>] acpi_format_exception+0xa2/0xaf
> [<c1226824>] acpi_ut_status_exit+0x2b/0x58
> [<c1222cbc>] acpi_walk_resources+0xfd/0x109
> [<c12393ca>] acpi_motherboard_add+0x22/0x32
> [<c123848e>] acpi_bus_driver_init+0x2a/0x7a
> [<c123892c>] acpi_bus_register_driver+0x8b/0xfb
> [<c15ebd20>] acpi_motherboard_init+0xd/0xf9
> [<c10003b1>] init+0x108/0x300
> [<c1003c93>] kernel_thread_helper+0x7/0x14

This ACPI "unknown exception code" problem is the same one reported here:
http://www.mail-archive.com/linux-acpi%40vger.kernel.org/msg02873.html

Basically, we just need to revert this:
http://ftp.kernel.org/pub/linux/kernel/people/akpm/patches/2.6/2.6.18-rc4/2.6.18-rc4-mm3/broken-out/hot-add-mem-x86_64-acpi-motherboard-fix.patch

The above patch happened to fix a hot-add memory problem, but it was
the wrong fix, and we're working out a better one.