Messages in this thread | | | From | "Gerard H. Pille" <> | Subject | Re: PROBLEM: system clock slow on Athlon AMD64 since 2.6.21 | Date | Mon, 11 Jun 2007 12:51:30 +0200 |
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>From: Robert Hancock <hancockr@shaw.ca> >To: Mikael Pettersson <mikpe@it.uu.se> >CC: ghpille@hotmail.com, linux-kernel@vger.kernel.org >Subject: Re: PROBLEM: system clock slow on Athlon AMD64 since 2.6.21 >Date: Sun, 10 Jun 2007 12:02:00 -0600 > >Mikael Pettersson wrote: >>On Fri, 08 Jun 2007 10:14:03 +0200, Gerard H. Pille wrote: >>>[1.] One line summary of the problem: >>>Since I switched from 2.6.20 to 2.6.21 on my Athlon AMD64 laptop, the >>>system time is slow - about 1' on 15'. >> >>According to your system description it seems that you have a >>Targa Visionary laptop with a VIA chipset and a Mobile Athlon64. >>If so, then you probably have the same problem I reported some time >>ago: see <http://marc.info/?l=linux-kernel&m=117681226421346&w=2> >>and the followup messages. The conclusion was that the chipset's >>ACPI PM timer slows down when the CPU is in C2. >> >>The workaround is to boot with processor.max_cstate=1. > >Which, if true, is extremely bizarre, as the whole point and reason for >existence of the ACPI PM timer is that it NOT do this, and remain at the >same rate regardless of CPU power management changes.. > >-- >Robert Hancock Saskatoon, SK, Canada >To email, remove "nospam" from hancockr@nospamshaw.ca >Home Page: http://www.roberthancock.com/ >
So I shouldn't have started a new bug report, sorry. I had once read your problem report, but I could not relocate it afterwards.
If I can provide any assistance in debugging, please let me know.
Thanks,
Gerard
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