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Update anti-thinkpad measures list.

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git-svn-id: http://lm-sensors.org/svn/lm-sensors/trunk@2733 7894878c-1315-0410-8ee3-d5d059ff63e0
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Jean Delvare
2004-10-14 20:56:47 +00:00
parent cf16be61a9
commit 14856e37e8
1 changed files with 4 additions and 10 deletions
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README.thinkpad
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@@ -23,26 +23,20 @@ We made several changes in release 2.6.5 (released September 15, 2002)
to minimize the chance of corruption. to minimize the chance of corruption.
Later evolutions were made and the current state is: Later evolutions were made and the current state is:
1) Sensors-detect accesses VPD information in the BIOS to identify IBM 1) The probing command (quick write 0) has been replaced by a different
systems. If it finds the VPD structure (which is IBM-proprietary),
sensors-detect will print a message and exit. This is a temporary
additional measure, which will be removed as soon as the other
measures have proven to be efficient.
2) The probing command (quick write 0) has been replaced by a different
command (read byte) for addresses where eeproms are known to live. command (read byte) for addresses where eeproms are known to live.
This should prevent corruption of 24RF08 eeproms in any system, This should prevent corruption of 24RF08 eeproms in any system,
IBM or not. A similar change was made to i2cdetect as well, although IBM or not. A similar change was made to i2cdetect as well, although
no corruption was ever reported using this tool. no corruption was ever reported using this tool.
3) The i2c-piix4 module (the bus driver that is used for Intel PIIX4-based 2) The i2c-piix4 module (the bus driver that is used for Intel PIIX4-based
systems, including IBM Thinkpads) now accesses DMI information systems, including IBM Thinkpads) now accesses DMI information
in the BIOS to identify the system manufacturer. If the system in the BIOS to identify the system manufacturer. If the system
manufacturer is IBM, i2c-piix4 will print a message and exit. manufacturer is IBM, i2c-piix4 will print a message and exit.
As the 24RF08 is on the PIIX4 SMBus, this prevents access to As the 24RF08 is on the PIIX4 SMBus, this prevents access to
the 24RF08, even if sensors-detect was not used. the 24RF08.
4) The sequence of probes in the eeprom module (when loaded with 3) The sequence of probes in the eeprom module (when loaded with
checksum=1) has been changed so that 24RF08 eeproms will checksum=1) has been changed so that 24RF08 eeproms will
not be corrupted. This *should* prevent corruption of 24RF08 not be corrupted. This *should* prevent corruption of 24RF08
eeproms in non-IBM systems. eeproms in non-IBM systems.