** Changed in: linux
Status: Incomplete = Expired
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https://bugs.launchpad.net/bugs/447852
Title:
WARNING: at /build/buildd/linux-2.6.31/arch/x86/kernel/apic/apic.c:247
This bug was filed against a series that is no longer supported and so
is being marked as Won't Fix. If this issue still exists in a supported
series, please file a new bug.
This change has been made by an automated script, maintained by the
Ubuntu Kernel Team.
** Changed in: linux (Ubuntu)
** Changed in: linux
Importance: Unknown = Medium
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https://bugs.launchpad.net/bugs/447852
Title:
WARNING: at /build/buildd/linux-2.6.31/arch/x86/kernel/apic/apic.c:247
I confirm that I no longer have this warning in dmesg on Ubuntu 10.04
LTS with lapic on the end of the kernel command line.
--
WARNING: at /build/buildd/linux-2.6.31/arch/x86/kernel/apic/apic.c:247
native_apic_write_dummy+0x33/0x40()
https://bugs.launchpad.net/bugs/447852
You received this bug
Same as comment #20. Using a K7S5A MB with ACPI enabled. Kernel fais to detect
that :
Mar 21 10:03:08 bouzin kernel: [0.00] Local APIC disabled by BIOS --
you can enable it with lapic
Mar 21 10:03:08 bouzin kernel: [0.00] APIC: disable apic facility
Adding lapic to the default
Ubuntu 9.10. linux-image-2.6.31-19-generic 2.6.31-19.56. Fujitsu Amilo M
7400 laptop.
I can confirm that adding the lapic kernel parameter works around the
problem. Before adding the parameter, dummy APIC emulation was used and
the CPU was running hot. With the lapic parameter, the warning
The required patch (mentioned in upstream bugreport) was in 2.6.32.5
Tested with 2.6.32-12.17; no more warning on my machine.
--
WARNING: at /build/buildd/linux-2.6.31/arch/x86/kernel/apic/apic.c:247
native_apic_write_dummy+0x33/0x40()
https://bugs.launchpad.net/bugs/447852
You received this
I use 2.6.31-17 kernel and get a trace msg during reboot. I've made the
changes in #20. Sometimes I can reboot w/o a problem, other times I get
a trace msg.
** Attachment added: trace
http://launchpadlibrarian.net/37331371/trace
--
WARNING: at
Please note that the following Ubuntu forum topic also references this
issue:
http://ubuntuforums.org/showthread.php?p=8357698
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WARNING: at /build/buildd/linux-2.6.31/arch/x86/kernel/apic/apic.c:247
native_apic_write_dummy+0x33/0x40()
https://bugs.launchpad.net/bugs/447852
You received this
** Changed in: linux (Ubuntu)
Status: Invalid = Confirmed
** Bug watch added: Linux Kernel Bug Tracker #14521
http://bugzilla.kernel.org/show_bug.cgi?id=14521
** Also affects: linux via
http://bugzilla.kernel.org/show_bug.cgi?id=14521
Importance: Unknown
Status: Unknown
** Changed in: linux
Status: Unknown = Incomplete
--
WARNING: at /build/buildd/linux-2.6.31/arch/x86/kernel/apic/apic.c:247
native_apic_write_dummy+0x33/0x40()
https://bugs.launchpad.net/bugs/447852
You received this bug notification because you are a member of Ubuntu
Bugs, which is
A WARNING can always be ignored.
It's an ERROR you have to worry about.
** Changed in: linux (Ubuntu)
Status: Confirmed = Invalid
--
WARNING: at /build/buildd/linux-2.6.31/arch/x86/kernel/apic/apic.c:247
native_apic_write_dummy+0x33/0x40()
https://bugs.launchpad.net/bugs/447852
You
Experienced the same here and traced it to the kernel incorrectly
thinking that lapic is disabled by the BIOS when there is no such option
(in BIOS). The upstream bug-report suggests that commit 48b1fddbb100a
may be responsible.
I've found the workaround is to add lapic (use Local Advanced
Fahad, please leave the bug status as I've set it.
In this case a warning CANNOT be ignored since the system has no APIC
which leads to other stability problems.
--
WARNING: at /build/buildd/linux-2.6.31/arch/x86/kernel/apic/apic.c:247
native_apic_write_dummy+0x33/0x40()
i also get the message and i have Ubuntu 2.6.31-14.48-generic.
here is the trace from kern.log:
Nov 1 20:26:51 peace kernel: [0.002001] [ cut here
]
Nov 1 20:26:51 peace kernel: [0.002025] WARNING: at
/build/buildd/linux-2.6.31/arch/x86/kernel/apic/apic.c:247
The warning is not reported any more after the latest kernel update.
$ cat /proc/version_signature
Ubuntu 2.6.31-13.44-generic
** Changed in: linux (Ubuntu)
Status: New = Invalid
--
WARNING: at /build/buildd/linux-2.6.31/arch/x86/kernel/apic/apic.c:247
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