Public bug reported:
Versions of the Ubuntu kernel upstream of 2.6.32 do not report more than
3.2GiB of RAM on specific motherboards. dmesg output on boot for the
error is as follows:
[ 0.000000] WARNING: BIOS bug: CPU MTRRs don't cover all of memory, losing
13040MB of RAM.
[ 0.000000] ------------[ cut here ]------------
[ 0.000000] WARNING: at
/home/kernel-ppa/mainline/build/arch/x86/kernel/cpu/mtrr/cleanup.c:1121
mtrr_trim_uncached_memory+0x343/0x350()
[ 0.000000] Hardware name: GA-970A-UD3
[ 0.000000] Modules linked in:
[ 0.000000] Pid: 0, comm: swapper Not tainted 2.6.33-02063302-generic
#02063302
[ 0.000000] Call Trace:
[ 0.000000] [<ffffffff81ad4423>] ? mtrr_trim_uncached_memory+0x343/0x350
[ 0.000000] [<ffffffff8106073c>] warn_slowpath_common+0x8c/0xc0
[ 0.000000] [<ffffffff81060784>] warn_slowpath_null+0x14/0x20
[ 0.000000] [<ffffffff81ad4423>] mtrr_trim_uncached_memory+0x343/0x350
[ 0.000000] [<ffffffff81ac7140>] ? early_idt_handler+0x0/0x71
[ 0.000000] [<ffffffff81ac7140>] ? early_idt_handler+0x0/0x71
[ 0.000000] [<ffffffff81acd9b5>] setup_arch+0x435/0x6e0
[ 0.000000] [<ffffffff81ac7cd9>] start_kernel+0xa9/0x390
[ 0.000000] [<ffffffff81ac7140>] ? early_idt_handler+0x0/0x71
[ 0.000000] [<ffffffff81ac7325>] x86_64_start_reservations+0x65/0x90
[ 0.000000] [<ffffffff81ac742d>] x86_64_start_kernel+0xbd/0xe0
[ 0.000000] ---[ end trace a7919e7f17c0a725 ]---
[ 0.000000] update e820 for mtrr
This issue manifests on all kernels upstream of 2.6.32 starting with
2.6.32. Attempting to boot with kernels that ship with Ubuntu 10.10 or
mainline kernels starting with 2.6.33 exhibit the same behavior.
ProblemType: Bug
DistroRelease: Ubuntu 10.04
Package: linux-image-2.6.32-38-generic 2.6.32-38.83
Regression: No
Reproducible: Yes
ProcVersionSignature: Ubuntu 2.6.32-38.83-generic 2.6.32.52+drm33.21
Uname: Linux 2.6.32-38-generic x86_64
AlsaVersion: Advanced Linux Sound Architecture Driver Version 1.0.21.
Architecture: amd64
AudioDevicesInUse:
USER PID ACCESS COMMAND
/dev/snd/controlC0: develop 1407 F.... pulseaudio
CRDA: Error: [Errno 2] No such file or directory
Card0.Amixer.info:
Card hw:0 'SB'/'HDA ATI SB at 0xfdff4000 irq 16'
Mixer name : 'Realtek ALC889'
Components : 'HDA:10ec0889,1458a002,00100004'
Controls : 43
Simple ctrls : 24
CurrentDmesg:
[ 3.212186] ppdev: user-space parallel port driver
[ 4.859817] r8169: eth0: link up
[ 4.860901] ADDRCONF(NETDEV_CHANGE): eth0: link becomes ready
[ 15.190085] eth0: no IPv6 routers present
Date: Sat Feb 25 12:40:55 2012
InstallationMedia: Ubuntu 10.04.4 LTS "Lucid Lynx" - Release amd64 (20120214.2)
IwConfig:
lo no wireless extensions.
eth0 no wireless extensions.
MachineType: Gigabyte Technology Co., Ltd. GA-970A-UD3
ProcCmdLine: BOOT_IMAGE=/boot/vmlinuz-2.6.32-38-generic
root=UUID=c947ee9c-cef4-4ef1-985c-e981cf69fa97 ro quiet splash
ProcEnviron:
LANG=en_US.utf8
SHELL=/bin/bash
RelatedPackageVersions: linux-firmware 1.34.7
RfKill:
SourcePackage: linux
dmi.bios.date: 10/13/2011
dmi.bios.vendor: Award Software International, Inc.
dmi.bios.version: F4
dmi.board.name: GA-970A-UD3
dmi.board.vendor: Gigabyte Technology Co., Ltd.
dmi.board.version: x.x
dmi.chassis.type: 3
dmi.chassis.vendor: Gigabyte Technology Co., Ltd.
dmi.modalias:
dmi:bvnAwardSoftwareInternational,Inc.:bvrF4:bd10/13/2011:svnGigabyteTechnologyCo.,Ltd.:pnGA-970A-UD3:pvr:rvnGigabyteTechnologyCo.,Ltd.:rnGA-970A-UD3:rvrx.x:cvnGigabyteTechnologyCo.,Ltd.:ct3:cvr:
dmi.product.name: GA-970A-UD3
dmi.sys.vendor: Gigabyte Technology Co., Ltd.
** Affects: linux (Ubuntu)
Importance: Undecided
Status: Confirmed
** Tags: amd64 apport-bug kconfig lucid needs-upstream-testing
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https://bugs.launchpad.net/bugs/941032
Title:
AMD64 kernel upstream of 2.6.32 reports only 3.2GiB of RAM
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