https://bugzilla.kernel.org/show_bug.cgi?id=12389
Thomas Renninger <tr...@suse.de> changed:
What |Removed |Added
----------------------------------------------------------------------------
Severity|normal |low
--- Comment #12 from Thomas Renninger <tr...@suse.de> 2010-11-08 21:04:57 ---
_PPC is 0 at cpufreq activation -> no limit
The later _PPC evaluations seem to get suppressed by the ratelimit:
[ 206.046151] cpufreq-core: __cpufreq_governor for CPU 1, event 3
[ 206.164035] cpufreq_debug_printk: 102 callbacks suppressed
We should see _PPC evaluation with non-zero result (when hitting the button and
the limit is applied) by disabling the ratelimit:
module_param(debug_ratelimit, uint, 0644);
MODULE_PARM_DESC(debug_ratelimit, "CPUfreq debugging:"
" set to 0 to disable ratelimiting.");
cpufreq.debug_ratelimit=0
No need to try that out, I first was totally confused where the _PPC calls with
the limit are gone...
I don't have much time this week and it all looks like the BIOS should not
return zero on first _PPC evaluation. For some reason this might be the case on
Windows or they throw an event when some func gets evaluated we don't... For
now I lower the severity (this not a critical bug at all) for this one and it
will take some time until I can have a look at it.
Hm can't resist to have a quick look at the dump..., something is missing, with
these tables _PPC can return nothing but zero.
Can you please dump some additional tables by:
acpidump --addr 0x7F6D5827 --length 0x000002A8 > CPU0IST.dat
acpidump --addr 0x7F6D5ACF --length 0x000000B1 > CPU1IST.dat
acpidump --addr 0x7F6D52F8 --length 0x000004AA > CPU0CST.dat
acpidump --addr 0x7F6D57A2 --length 0x00000085 > CPU1CST.dat
and attach them.
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