cvs commit: src/sys/dev/acpica acpi_ec.c

Nate Lawson nate at
Tue Mar 6 18:35:44 UTC 2007

Ruslan Ermilov wrote:
> Hi Nate,
> On Tue, Feb 27, 2007 at 12:14:20AM +0000, Nate Lawson wrote:
>> njl         2007-02-27 00:14:20 UTC
>>   FreeBSD src repository
>>   Modified files:
>>     sys/dev/acpica       acpi_ec.c 
>>   Log:
>>   Rework EC I/O approach.  Implement burst mode, including proper handling of
>>   case where it asynchronously exits burst mode on its own.  Handle different
>>   values of hz in sleep loop.  Provide more debugging options to tune EC
>>   behavior.  These tunables/sysctls may be temporary and are not for user
>>   access if the EC is working properly.  Burst mode is now on by default for
>>   testing and the poll interval has been increased from 100 to 500 us and
>>   total timeout from 100 to 500 ms.
>>   Hopefully this should be the first step of addressing reports of timeout
>>   errors during battery or thermal access, especially on HP/Compaq laptops.
>>   It is reasonably stable and should not cause a loss of functionality or
>>   performance on systems that were previously working.  Testing shows an
>>   increase of responsiveness by ~75% on one system.
>>   PR:             kern/98171
>>   Revision  Changes    Path
>>   1.69      +206 -109  src/sys/dev/acpica/acpi_ec.c
> I'm having a problem with this commit.  My ThinkPad 600X
> panics on boot with this change.  If I back it out, all
> gets back to normal.  What information do you need except
> from a verbose boot log to track it down?  (I can grab a
> text from serial console, etc.)

panic message and location, for starters.


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