Athlon

[Jerry McBride]

Depending on hgow you have cpufreq compiled into the kernel.... I've been able 
to switch speeds on the fly with the following scripts...

# make it fast
modprobe cpufreq_userspace 1>/dev/null 2>/dev/null
echo userspace > /sys/devices/system/cpu/cpu0/cpufreq/scaling_governor
echo 1200000 > /sys/devices/system/cpu/cpu0/cpufreq/scaling_setspeed

# make it slow
modprobe cpufreq_userspace 1>/dev/null 2>/dev/null
echo userspace > /sys/devices/system/cpu/cpu0/cpufreq/scaling_governor
echo 500 > /sys/devices/system/cpu/cpu0/cpufreq/scaling_setspeed



Cheers,....



On Wednesday 14 January 2004 02:27 am, Roger Oberholtzer wrote:
> On Tue, 13 Jan 2004 20:44:11 -0500
>
> Jerry McBride <mcbrides9 at comcast.net> wrote:
> > On Tuesday 13 January 2004 09:37 am, Roger Oberholtzer wrote:
> > > Anyone using Athlon Mobility CPUs in laptops running SUSE 9?
> >
> > Not SUSE, but Gentoo. I'm using the LAPTOP-MODE patch in kernel 2.6.1
> > compiled with cpufreq support. Works GREAT. Target laptop is a compaq
> > 700us... I'm able to throttle the cpu speed from 500mhz to 1.2gig on the
> > fly with the laptop-mode patch allowing the harddrive to sleep for longer
> > periods. I can run this particular flopper in low-E-mode for nearly 5
> > hours before the battery poops out....  Thats about twice what I had
> > before the changes.
> >
> > Pretty darn good!
>
> Better than my luck. I have an Acer 1350. The original install of SUSE9
> installed a kernel (2.4.21-99-athlon) for the AMD. The install worked fine.
> However, when using the computer, it would freeze at some point. Usually
> within 5 minutes of booting. Often less. So, I reinstalled with ACPI off.
> That made the freezing stop. However, I think the machine is not running at
> its best. There is no battery info, as the power stuff was disabled. And,
> the Acer does not seem to beep or warn when the power starts to get low, as
> my old Dell did. So, I must run on power all the time as I have no
> indication when power will end. I upgraded the kernel to one SUSE released
> to correct unspecified ACPI problems (2.4.21-144-athlon). I tried enabling
> ACPI on the kernel command line, but it was worse than the previous kernel.
> It would not even boot.
>
> Aside from the lack of power info, it also freezes when I log out or shut
> down. Every time. No message seen. The X graphic stuff is gone. Usually
> only the mouse cursor on a black background remains. Nothing to do but
> cycle the power.
>
> Below is the powernow info I get at boot. The CPU starts in the slowest
> speed. And stays that way. I am running cpufreqd, but I do not see that it
> is doing anything. That daemon in a new one for me, so I may just be doing
> something dumb.
>
>  powernow: AMD K7 CPU detected.
>  powernow: PowerNOW! Technology present. Can scale: frequency and voltage.
>  powernow: Found PSB header at c00f06f0
>  powernow: Table version: 0x12
>  powernow: Flags: 0x0 (Mobile voltage regulator)
>  powernow: Settling Time: 100 microseconds.
>  powernow: Has 8 PST tables. (Only dumping ones relevant to this CPU).
>  powernow: PST:2 (@c00f072e)
>  powernow:  cpuid: 0x7a0 fsb: 133        maxFID: 0x18    startvid: 0x7
>  powernow:    FID: 0xf (10.5x [1396MHz]) VID: 0xe (1.300V)
>  powernow:    FID: 0x0 (11.0x [1463MHz]) VID: 0xd (1.350V)
>  powernow:    FID: 0x1 (11.5x [1529MHz]) VID: 0xc (1.400V)
>  powernow:    FID: 0x2 (12.0x [1596MHz]) VID: 0xb (1.450V)
>  powernow:    FID: 0x3 (12.5x [1662MHz]) VID: 0xa (1.500V)
>  powernow:    FID: 0x14 (13.0x [1729MHz])        VID: 0x9 (1.550V)
>  powernow:    FID: 0x15 (13.5x [1795MHz])        VID: 0x8 (1.600V)
>  powernow:    FID: 0x18 (15.0x [1995MHz])        VID: 0x7 (1.650V)
>
> I may try a 2.6 kernel. SUSE provide an early one. I do not know if it has
> any laptop patch. I will have to check that.
>
> I would run Gentoo on the laptop, but it is a work machine, and we have
> decided to use SUSE9 in production. (Except I did get my Gentoo diskless
> stuff in there somewhere!)