We are a support service provider, so we had this bug on different machines with different OSes (UNIX-based) in completely different datacenters. At the moment we have two machines with this problem. Here comes BIOS and motherboard info from dmidecode's output for both:
========
Machine 1
========
BIOS Information
Vendor: American Megatrends Inc.
Version: 1.2
Release Date: 08/19/11
Address: 0xF0000
Runtime Size: 64 kB
ROM Size: 4096 kB
Characteristics:
ISA is supported
PCI is supported
PNP is supported
BIOS is upgradeable
BIOS shadowing is allowed
ESCD support is available
Boot from CD is supported
Selectable boot is supported
BIOS ROM is socketed
EDD is supported
5.25"/1.2 MB floppy services are supported (int 13h)
3.5"/720 kB floppy services are supported (int 13h)
3.5"/2.88 MB floppy services are supported (int 13h)
Print screen service is supported (int 5h)
8042 keyboard services are supported (int 9h)
Serial services are supported (int 14h)
Printer services are supported (int 17h)
CGA/mono video services are supported (int 10h)
ACPI is supported
USB legacy is supported
LS-120 boot is supported
ATAPI Zip drive boot is supported
BIOS boot specification is supported
Targeted content distribution is supported
BIOS Revision: 8.16
System Information
Manufacturer: Supermicro
Product Name: X8SIE
Version: 0123456789
Serial Number: 0123456789
UUID: 49434D53-0200-9008-2500-089025002931
Wake-up Type: Power Switch
SKU Number: To Be Filled By O.E.M.
Family: To Be Filled By O.E.M.
Base Board Information
Manufacturer: Supermicro
Product Name: X8SIE
Version: 0123456789
Serial Number: 0123456789
Asset Tag: To Be Filled By O.E.M.
Features:
Board is a hosting board
Board is replaceable
Location In Chassis: To Be Filled By O.E.M.
Chassis Handle: 0x0003
Type: Motherboard
Contained Object Handles: 0
========
Machine 2
========
BIOS Information
Vendor: American Megatrends Inc.
Version: 1.1a
Release Date: 09/27/10
Address: 0xF0000
Runtime Size: 64 kB
ROM Size: 4096 kB
Characteristics:
ISA is supported
PCI is supported
PNP is supported
BIOS is upgradeable
BIOS shadowing is allowed
ESCD support is available
Boot from CD is supported
Selectable boot is supported
BIOS ROM is socketed
EDD is supported
5.25"/1.2 MB floppy services are supported (int 13h)
3.5"/720 kB floppy services are supported (int 13h)
3.5"/2.88 MB floppy services are supported (int 13h)
Print screen service is supported (int 5h)
8042 keyboard services are supported (int 9h)
Serial services are supported (int 14h)
Printer services are supported (int 17h)
CGA/mono video services are supported (int 10h)
ACPI is supported
USB legacy is supported
LS-120 boot is supported
ATAPI Zip drive boot is supported
BIOS boot specification is supported
Targeted content distribution is supported
BIOS Revision: 8.16
System Information
Manufacturer: Supermicro
Product Name: X8SIT
Version: 0123456789
Serial Number: 0123456789
UUID: 49434D53-0200-900D-2500-0D902500453E
Wake-up Type: Power Switch
SKU Number: To Be Filled By O.E.M.
Family: To Be Filled By O.E.M.
Base Board Information
Manufacturer: Supermicro
Product Name: X8SIT
Version: 0123456789
Serial Number: 0123456789
Asset Tag: To Be Filled By O.E.M.
Features:
Board is a hosting board
Board is replaceable
Location In Chassis: To Be Filled By O.E.M.
Chassis Handle: 0x0003
Type: Motherboard
Contained Object Handles: 0
--
Best regards, Igor Netkachev
NK support
netkachev@xxxxxxxxxxxxx
http://www.nksupport.com
2012/6/15 Guenter Roeck <guenter.roeck@xxxxxxxxxxxx>
Hi Igor,
it almost looks like the chip might reset itself.
Of course that could be caused by anything, but it is odd that it happens
on multiple machines. Do those machines use IPMI or ACPI to access the chip,
by any chance ? ASUS systems do that, for example, and the use of a hwmon chip
driver is generally not recommended for such machines and may cause all sorts
of issues.
Thanks,
Guenter
_______________________________________________ lm-sensors mailing list lm-sensors@xxxxxxxxxxxxxx http://lists.lm-sensors.org/mailman/listinfo/lm-sensors
