[Intrepid] SRU: Kernel panic on boot if SMP (ASUS M3A-H/HDMI

Stefan Bader stefan.bader at canonical.com
Mon Apr 27 17:59:45 UTC 2009


SRU Justification:

Impact: The BIOS is expected to clear the SYSCFG[MtrrFixDramModEn] on AMD CPUs
after fixed MTRRs are configured. Some BIOSes do not clear 
SYSCFG[MtrrFixDramModEn] on BP (and on APs), which leads to panics and freezes.

Fix: Attached patch from upstream which is included in Jaunty and has been 
verified to help on Intrepid too.

Testcase: see bug report.


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