Hi, This is an updated repost of http://lkml.org/lkml/2007/4/3/110 whith the changes which Andrew Morton added in http://lkml.org/lkml/2007/4/8/88 to fix 'make headers_check' applied to the 2nd patch, which he updated.
The oops of Andrew's Viao on s2ram was caused by a merge error which was caused by me sending the patches diffed against 2.6.20 initially. It is diffed against 2.6.21-rc6-mm1 to allow Andrew to apply it without rejects to his tree. Best Regards, Bernhard PS: Short summary of the complese description of the patches: Summary: With these patches, s2ram and s2disk are fixed on at least the Acer Ferrari 1000 notebooks and at least s2disk on the Acer Ferrari 5000 notebooks. The BIOS of these Acer AMD Turion 64 notebooks makes use of fixed-range IORRs to implement Shadow RAM and direct write-back memory, and it does this while it transitions the system into ACPI mode, but Linux MTTR code does not handle situations like this yet, which results in errors which look like hardware errors. Symptoms vary from from instant resets and power-offs to SATA link failures. Short problem description: These system errors is the of Linux MTRR code being unaware of the AMD IORRs so far and that the Linux MTRR code so far isn't able to cope with BIOSes which change the MTRRs of CPUs in SMM, e.g. when it is called by acpi_enable() to transition the system into ACPI mode. The resulting combinations of AMD IORR MSR bits and Intel-style MTRR bits is not allowed and causes undefined and unpredictable behaviour (according to the AMD manual), the fix needs to (at least) save the MTRRs of the BSP before suspend to make sure that it does not change the fixed- range MTRR bits on resume, where, with current code, the errors start. The intro text of initial posting at http://lkml.org/lkml/2007/4/3/110 contains more detail and an overview over the four patches of the fix. - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [EMAIL PROTECTED] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
