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Date: Fri, 6 Jul 2007 10:06:37 +0800 From: "rae l" <crquan@...il.com> To: "David Brownell" <david-b@...bell.net> Cc: rtc-linux@...glegroups.com, "Luca Tettamanti" <kronos.it@...il.com>, "Linux Kernel list" <linux-kernel@...r.kernel.org> Subject: Re: Does the kernel HPET support has problems or the hwclock from util-linux? On 7/3/07, Luca Tettamanti <kronos.it@...il.com> wrote: > rae l <crquan@...il.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. I searched the CONFIG_HPET_RTC_IRQ, it's conflict with HPET_EMULATE_RTC, that I've enabled. so while HPET_RTC_IRQ is the good way, EMULATE_RTC is a bad way. > > Luca > -- > Windows NT crashed. > I'm the Blue Screen of Death. > No one hears your screams. > -- Denis Cheng Linux Application Developer - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.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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