linux-kernel - Re: hpet timers gone?

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Date:	Mon, 13 Sep 2010 17:16:33 -0600
From:	Robert Hancock <hancockrwd@...il.com>
To:	Udo van den Heuvel <udovdh@...all.nl>
Cc:	linux-kernel@...r.kernel.org
Subject: Re: hpet timers gone?

On Mon, Sep 13, 2010 at 8:52 AM, Udo van den Heuvel <udovdh@...all.nl> wrote:
> On 2010-05-31 06:00, Robert Hancock wrote:
>> On Sun, May 30, 2010 at 8:53 PM, Udo van den Heuvel <udovdh@...all.nl> wrote:
>>> On 2010-05-30 20:51, Robert Hancock wrote:
>>>> On 05/30/2010 01:34 AM, Udo van den Heuvel wrote:
>>>>> The board has VIA C7 CPU and VIA CX700M2 Unified Digital Media IGP
>>>>> chipset which supports HPET.
>>>>>
>>>>> Can it be that the kernel lacks support for CX700 hpet?
>>>>> Or is it a matter of getting the BIOS upgrade to work?
>>>>
>>>> Your current BIOS doesn't provide an HPET ACPI table, which is the way
>>>> it's supposed to indicate support. The kernel only supports
>>>> force-enabling HPET on VIA for VT8235 and VT8237.
>>>
>>> So yes, I should try the BIOS upgrade first?
>>
>> If they did add an HPET table entry, it should help, yes..
>
> Is there a workaround?
> VIA was not so helpfull: the bios flash tool they have on the site does
> not recognise the board as a VIA board.
> Also they state the latest BIOS will not add HPET to ACPI table.
>
> So what else can I do to enable HPET?

At this point, not much, unless you can track down the chipset
information that would allow us to implement force enabling HPET on
that chipset..
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