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

Stefan Bader stefan.bader at canonical.com
Mon Apr 27 18:02:52 UTC 2009


Stefan Bader wrote:
> 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.
> 
> 
Actually, there is a Hardy task for that as well. So requesting SRU for both.

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