Hi Robert, After 2.6.18 booted on my machine, there's a device file for hpet: /dev/hpet.But when I read this device file, I got the error: cat: /dev/hpet: Input/output error In dmesg, I found some error messages related to hpet: hpet_resources: 0xfed00000 is busy hpet_acpi_add: no address or irqs in _CRS Also there're some not-error-messages about hpet: time.c: Using 25.000000 MHz WALL HPET GTOD HPET timer. time.c: Detected 2613.696 MHz processor. ........ hpet0: at MMIO 0xfed00000 (virtual 0xffffffffff5fe000), IRQs 2, 8, 31 hpet0: 3 32-bit timers, 25000000 Hz I guess maybe there's only one hpet timer in system, so after kernel use one, the hpet char device driver can't find a free hpet timer anymore. Am I right? The full dmesg is attached. Thanks, Forrest
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