Fix committed to Hardy (target 2.6.24-24.54)
** Changed in: linux (Ubuntu Hardy)
Status: In Progress => Fix Committed
** Description changed:
+ 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.
+
+ ---
+
Binary package hint: linux-image-2.6.27-7-server
Latest working kernel version: Doesn't work with any ubuntu versions of
the kernel that I know of. Latest tried is 2.6.26-7-server. Does
apparently work with the latest official stable 2.6.24.7 linux mainline
kernel on a down-cored Phenom CPU according to
http://bugzilla.kernel.org/show_bug.cgi?id=11714#c38.
Earliest failing kernel version: The earliest failing version that I
know about is 2.6.24-19-server. Have also tried a linux-image-generic
kernel.
Distribution: Ubuntu 8.10
Hardware Environment: ASUS M3A-H/HDMI, 4GB RAM, AMD PHENOM X3 8750,
4xSATA, 256MB Radeon 2400 PRO PCI Express.
Software Environment: Ubuntu 64bit server edition. Using the latest
available bios update (Version 1001)
Problem Description: When not using acpi=off or acpi=ht, the system goes
straight into kernel panic. This occurs on or after installation.
Steps to reproduce: Use the same hardware set-up as me. Boot into
ubuntu.
Note: I have also reported this as a mainline linux bug and the full
history and a lot of information (dmesg output, acpidump output, kernel
panic screen shots etc.) can be found here:
http://bugzilla.kernel.org/show_bug.cgi?id=11714. Support there have
helped identify this as a CPUID4 problem, but can only fix it if I
reproduce it using a mainline linux kernel. I'd like to stick with
ubuntu. In this case they say I'll have get ubuntu support to help me
fix it. (See comment 50 here:
http://bugzilla.kernel.org/show_bug.cgi?id=11714#c50)
--
Kernel panic on boot if SMP (ASUS M3A-H/HDMI)
https://bugs.launchpad.net/bugs/292619
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