On 26 July 2010 13:11, Gilles Chanteperdrix < [email protected]> wrote:
> >>>>> > >>>>> Stephen Bryant wrote: > >>>>> > I've had a look at dmesg, but cannot find any references to SMI > - > >>>> what > >>>>> > should I be looking for? > >>>>> > >>>>> What is described in the TROUBLESHOOTING file. > >>>>> > >>>>> > >>>>> I have tried disabling the SMI workaround, ensuring that SMI > detection > >>>>> is not disabled, and logging the kernel output (setting the kernel > log > >>>>> level to 8 in grub and sending the output to the serial port to be > >>>>> picked up by another machine). The troubleshooting file states that I > >>>>> should see "Xenomai: Intel chipset found and SMI workaround not > >>>>> enabled, you may encounter high interrupt latencies." in this output, > >>>>> however this does not occur - I am using an Intel Core 2 Duo but with > >>>>> SMP disabled, if this has any relevance. > >>>> The SMI detection/workaround is based on the chipset you have. If your > >>>> chipset is an ICH10, Stefan posted a patch a few days ago. If it is > >>>> another one, then please send us the result of lspci -vv on your > target. > >>>> > >>> It seems to be ICH8, so the result is attached, > >> Please try with the following patch: > >> > >> > >> -- > >> Gilles. > >> > > > > With the patch applied and SMI Workaround not used I get the kernel > message > > as expected: "...SMI workaround not enabled...". > > > > However, with the SMI Workaround enabled and Globally disabling SMI I get > > the messages: > > "Xenomai: SMI-enabled chipset found > > Xenomai: SMI workaround failed!" > > It probably means that your board manufacturer has decided, at BIOS > level, to prevent you from disabling the SMIs. You may want to try > disabling the SMI bits one by one. > > -- > Gilles. > Do you mean enabling / disabling the individual options in the SMI Workaround section of the kernel config file, or are you suggesting something lower level / something else? Steve
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