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Subject: Re: register dump when press scroll lock
From: Len Brown <len.brown@intel.com>
To: Marcel Sebek <sebek64@post.cz>
Cc: linux-kernel@vger.kernel.org
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Date: 05 Jul 2004 15:18:42 -0400
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On Sat, 2004-07-03 at 06:25, Marcel Sebek wrote:
> I run 2.6.7 kernel.
> 
> Steps to reproduce:
> Switch keyboard by "Pause/Break" key from English to Czech map (or
> another
> second keymap, I also tried Slovak). Then press scrolllock. The
> following
> is printed out and scrlock led state is untouched:
> 
> Pid: 0, comm:              swapper
> EIP: 0060:[<c01e5382>] CPU: 0
> EIP is at acpi_processor_idle+0xd4/0x1c7
>  EFLAGS: 00000212    Not tainted  (2.6.7)
> EAX: 00cf9366 EBX: 00004008 ECX: 00cf90da EDX: 00004008
> ESI: cffd28b0 EDI: c0467e80 EBP: cffd2800 DS: 007b ES: 007b
> CR0: 8005003b CR2: 080b7f40 CR3: 0ca85000 CR4: 000002d0
>  [<c0101f3c>] cpu_idle+0x2c/0x40
>  [<c043d5fc>] start_kernel+0x13c/0x160
>  [<c043d370>] unknown_bootoption+0x0/0x110
> 
> EIP is at c01e5382 or c01e5361. Here is the asm code from gdb:
> 
> 0xc01e5355 <acpi_processor_idle+167>:   cmp    $0x3,%eax
> 0xc01e5358 <acpi_processor_idle+170>:   je     0xc01e539f
> <acpi_processor_idle+241>
...
You're in the ACPI idle loop, which is normal.

Why it prints this stuff out is probably
answered someplace in the CONFIG_MAGIC_SYSRQ code.

-Len