On Sat, 4 Aug 2007 15:16:56 +0200 Andreas Mohr (AM) wrote: AM> On Sat, Aug 04, 2007 at 12:58:35PM +0200, Benjamin Pineau wrote: AM> > AM> > But - if I remember well - HPET is not "officialy" documented as AM> > supported on ICH4-M (right ?). So, will this patch eternaly stay out AM> > of mainline ? did it broke something for someone ? or does it just AM> > lacks testing reports ?
HPET is not officially documented/supported for ICH3/4. Therefore, enabling
it by default is not a good idea for distribution kernels. The suggested
approach is to provide a command line option to force enable HPET on such
chipsets, similar to how "lapic" works today. That will probably happen
when the HPET quirks get merged into mainline.
AM> > Same for "hpet-force-enable-on-vt8235-37-chipsets.patch" (I use this
AM> > one on my Asrock P4VT8+ motherboard (VT8237 based) with no pb).
AM>
AM> What!?!?!?
AM> Why did nobody tell me that VT8235 *does* actually have a HPET
AM> implementation? ;)
Same story as for ICH3/4; VT8235 is not documented. It works on my test
machine. I got a report from David Edwards that it does not work on his
Via EPIA ME6000.
AM> I'm going to test this patch on my EPOX 8K5A2+ (VT8235, i.e. PCI ID
AM> 0x3177). I originally thought that having a HPET doesn't matter much due
AM> to other timers being available, but it seems it actually matters a LOT
AM> due to less timer wakeups etc.
Please let us know whether it works for you.
Cheers,
- Udo
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