Re: w83627 driver bug report

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Hi Guenter,

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


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