linux-kernel - Re: Cpufreq not working in 2.6.18-rc6

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Date:	Sat, 9 Sep 2006 10:47:39 -0400
From:	Dave Jones <davej@...hat.com>
To:	Thiago Galesi <thiagogalesi@...il.com>
Cc:	Linux Kernel <linux-kernel@...r.kernel.org>
Subject: Re: Cpufreq not working in 2.6.18-rc6

On Sat, Sep 09, 2006 at 11:22:02AM -0300, Thiago Galesi wrote:
 > Hello
 > 
 > Cpufreq is not working for me in 2.6.18-rc6 (as it worked flawlessly
 > in 2.6.17.7 and earlier versions)
 > 
 > I cannot insmod powernow-k7, it only shows (in dmesg):
 > 
 > powernow: PowerNOW! Technology present. Can scale: frequency and voltage.
 > 
 > But then insmod fails with EBUSY (or better: init_module(0x804b018,
 > 11352, "")       = -1 EBUSY (Device or resource busy))
 > 
 > I traced this to cpufreq_register_driver returning -0x16
 > 
 > I disabled APM for this kernel, previous kernel version had APM
 > enabled (AFAIK, shouldn't be relevant; ACPI is enabled)
 > 
 > I tried to enable APM only to discover it does not work to compile APM
 > as a module :/ (complains about default_idle and machine_real_restart
 > being "unknown symbols")
 > 
 > ...
 >
 > CONFIG_X86_POWERNOW_K7_ACPI=y
 > ..
 > CONFIG_ACPI_PROCESSOR=m

Does it start working again if you change ACPI_PROCESSOR=y ?

	Dave

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