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Date: Mon, 2 Jul 2007 22:13:54 +0200
From: Luca Tettamanti <kronos.it@gmail.com>
To: rae l <crquan@gmail.com>
Cc: rtc-linux@googlegroups.com, linux-kernel@vger.kernel.org,
       Adrian Bunk <bunk@stusta.de>
Subject: Re: Does the kernel HPET support has problems or the hwclock from util-linux?
Message-ID: <20070702201354.GA13313@dreamland.darkstar.lan>
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rae l <crquan@gmail.com> ha scritto:
> from this address, I know util-linux-2.12r is the latest:
> http://www.kernel.org/pub/linux/utils/util-linux/util-linux-2.12r.lsm
> 
> My Dell OptiPlex 320 has 4 HPET timers and no RTC, so the execution of
> hwclock has errors:
> 
> gektop@tux ~ $ /sbin/hwclock --show
> select() to /dev/rtc to wait for clock tick timed out
> gektop@tux ~ $ /sbin/hwclock --version
> hwclock from util-linux-2.12r

I think that the problem is that HPET and the CMOS RTC (list in CC)
share the same interrupt line.
I suppose that you should enable CONFIG_HPET_RTC_IRQ (my hardware has
the same "feature"); in this way /dev/rtc correcly reports that it
cannot deliver the interrupt (when HPET is enabled) and hwclock uses
direct ISA access.

Luca
-- 
Windows NT crashed.
I'm the Blue Screen of Death.
No one hears your screams.