> > > > Workaround: When we disable HyperThreading in BIOS, this
> > > > problem goes away. We re-enabling HT, it comes back...
> > >
> > > Have you ruled out marginal memory, or overclocking/overheating?
> >
> > No overclocking done, no overheating happening. All RAM memory checks
> > turn out just fine, with and without HT.
> >
>
> When you say "All RAM memory checks turn out just fine" do you mean
> the BIOS memory checks or something else?
>
> For a proper memory test run memtest86 (http://www.memtest86.com/)
> and/or memtest86+ (http://www.memtest.org/) overnight (some 8-12hours
> or more) with all tests enabled.. If the machine survives without
> errors that then you can be reasonably sure memory is OK... The BIOS
> tests are more or less worthless.
The RAM is 100% OK, both according to the initial BIOS memory check and
memtest86 running for more than four (4) hours straight.
One more thing that we just noticed: it seems the cache corruption (or
whatever it is) only occurs when X is running.
//D
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