Bug 7503 - HPET not enabled on Asus A8V Deluxe
Summary: HPET not enabled on Asus A8V Deluxe
Alias: None
Product: Timers
Classification: Unclassified
Component: Other (show other bugs)
Hardware: i386 Linux
: P2 normal
Assignee: john stultz
Depends on:
Reported: 2006-11-12 18:06 UTC by Jasmin Buchert
Modified: 2007-02-09 13:36 UTC (History)
2 users (show)

See Also:
Kernel Version: 2.6.19-rc5
Regression: ---
Bisected commit-id:


Description Jasmin Buchert 2006-11-12 18:06:04 UTC
I recently noticed that the HPET is not detected by the Linux Kernel.
I'm using an Asus A8V Deluxe with a VIA VT8237 Chipset which supports HPET. 
Apparently ASUS forgot to add a HPET ACPI table.
There should be a way to detect the HPET without an ACPI HPET table.
Comment 1 Andi Kleen 2006-11-12 23:27:11 UTC
Maybe there should, but there isn't.

What's the point of this bug? Do you want to submit a patch for for this?

Comment 2 Thomas Gleixner 2006-11-12 23:35:28 UTC
This was discussed on LKML already a couple of times. HPET must be enabled by
the BIOS and there is no sensible way to enable it by poking in some chipset
registers. Also power saving modes might break, if it is enabled and not
supported by the BIOS.
Comment 3 john stultz 2007-02-09 13:36:14 UTC
Without BIOS enablement, the HPET is not accessible to linux.
Please contact your BIOS vendor for an update to enable HPET.
Closing this as invalid.

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