[Adding tglx to CC as he knows more about HPET's than I] On Sunday 03 February 2008 18:33:57 [EMAIL PROTECTED] wrote: > Hello, > I have a asus a6t with nforce4/MCP51 chipset. I pass to kernel 2.6.24 > 32 bit the options acpi_use_timer_override and hpet=force, in this way > and the timer IRQ ends up routed as IO-APIC-edge instead of XT-PIC. > With acpi_use_timer_override I just get: > > TIMER: vector=0x30 apic1=0 pin1=2 apic2=-1 pin2=-1 > > and it works through the IO-APIC. > > Instead the hpet is disabled and I just get : > > Time: acpi_pm clocksource has been installed. > Clocksource tsc unstable (delta = -85010975 ns) > > Is possible to have hpet working also with if the BIOS doesn't support > it ?
One point before we start - MCP51 is nForce 5, not nForce 4 (which is CK804). If my understanding is correct, acpi_use_timer_override is only a workaround required for those nForce 5 boards that don't enable the HPET for you. So IIUC, you should be able to use either 'hpet=force' or 'acpi_use_timer_override', either of which should solve any timing issues you see, but you shouldn't need both (which should solve your problem of acpi_use_timer_override ignoring the HPET - it shouldn't be needed if 'hpet=force' enables the HPET). -Carlos -- E-Mail: [EMAIL PROTECTED] Web: strangeworlds.co.uk GPG Key ID: 0x23EE722D -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [EMAIL PROTECTED] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
