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Date: Wed, 24 Feb 2010 18:37:04 -0500 (EST)
From: Justin Piszcz <jpiszcz@lucidpixels.com>
To: linux-kernel@vger.kernel.org
Subject: 2.6.33: Problem continues: WARNING: at arch/x86/kernel/hpet.c:404
 hpet_next_event+0x70/0x80
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Hello,

Again, on the Intel DP55KG board:

# uname -a
Linux host 2.6.33 #1 SMP Wed Feb 24 18:31:00 EST 2010 x86_64 GNU/Linux

[    1.237600] ------------[ cut here ]------------
[    1.237890] WARNING: at arch/x86/kernel/hpet.c:404 hpet_next_event+0x70/0x80()
[    1.238221] Hardware name:
[    1.238504] hpet: compare register read back failed.
[    1.238793] Modules linked in:
[    1.239315] Pid: 0, comm: swapper Not tainted 2.6.33 #1
[    1.239605] Call Trace:
[    1.239886]  <IRQ>  [<ffffffff81056c13>] ? warn_slowpath_common+0x73/0xb0
[    1.240409]  [<ffffffff81079608>] ? tick_dev_program_event+0x38/0xc0
[    1.240699]  [<ffffffff81056cb0>] ? warn_slowpath_fmt+0x40/0x50
[    1.240992]  [<ffffffff81079608>] ? tick_dev_program_event+0x38/0xc0
[    1.241281]  [<ffffffff81041ad0>] ? hpet_next_event+0x70/0x80
[    1.241573]  [<ffffffff81079608>] ? tick_dev_program_event+0x38/0xc0
[    1.241859]  [<ffffffff81078e32>] ? tick_handle_oneshot_broadcast+0xe2/0x100
[    1.246533]  [<ffffffff8102a67a>] ? timer_interrupt+0x1a/0x30
[    1.246826]  [<ffffffff81085499>] ? handle_IRQ_event+0x39/0xd0
[    1.247118]  [<ffffffff81087368>] ? handle_edge_irq+0xb8/0x160
[    1.247407]  [<ffffffff81029f55>] ? handle_irq+0x15/0x20
[    1.247689]  [<ffffffff810294a2>] ? do_IRQ+0x62/0xe0
[    1.247976]  [<ffffffff8146be53>] ? ret_from_intr+0x0/0xa
[    1.248262]  <EOI>  [<ffffffff8102f277>] ? mwait_idle+0x57/0x80
[    1.248796]  [<ffffffff8102645c>] ? cpu_idle+0x5c/0xb0
[    1.249080] ---[ end trace db7f668fb6fef4e1 ]---

Is this something Intel has to fix or is it a bug in the kernel?

Justin.

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