Corentin Chary wrote:
On Mon, May 25, 2009 at 12:07 PM, Alan Jenkins
<alan-jenkins@xxxxxxxxxxxxxx> wrote:
Corentin Chary wrote:
On Mon, May 25, 2009 at 11:43 AM, Alan Jenkins
<alan-jenkins@xxxxxxxxxxxxxx> wrote:
Corentin Chary wrote:
On Sunday 24 May 2009 19:29:37 Alan Jenkins wrote:
Corentin Chary wrote:
On Sun, May 24, 2009 at 11:28 AM, Alan Jenkins
<sourcejedi.lkml@xxxxxxxxxxxxxx> wrote:
On 5/16/09, Len Brown <lenb@xxxxxxxxxx> wrote:
From: Grigori Goronzy <greg@xxxxxxxxxxxx>
The older eeepc-acpi driver allowed to control the SHE performance
preset through a ACPI function for just this purpose. SHE underclocks
and undervolts the FSB and undervolts the CPU (at preset 2,
"powersave"), or slightly overclocks the CPU (at preset 0,
"performance"). Preset 1 is the default setting with default clocks and
voltage.
The new eeepc-laptop driver doesn't support it anymore.
The attached patch adds support for it to eeepc-laptop. It's very
straight-forward and almost trivial.
Signed-off-by: Grigori Goronzy <greg@xxxxxxxxxxxx>
Signed-off-by: Corentin Chary <corentincj@xxxxxxxxxx>
Signed-off-by: Len Brown <len.brown@xxxxxxxxx>
---
Hi, out of curiosity I tried this on my EeePC 701. I upgraded the
BIOS to the latest version available a few months ago.
I find that the file is present and can successfully be read from.
The file returns the value "513". If I write "1" to it, nothing
happens. If I write "0" to it, the speakers start hissing and the
file then returns the value "512". Writing "1" again gets it back to
normal. There is no apparent effect on performance.
This is stupid, because we _do_ appear to check the BIOS supported
features bitmask, but that's Asus firmware for you. Can you please
add an extra test, so this file only allows reads or writes if the
current value is 0 or 1? If you're quick you might slip it into -rc8
Hi, Can you try this patch ? It seems to works for me.
Thanks, it does make the interface less confusing. The behaviour (no
performance change, hissing speakers) is the same.
It works on mine (original bios). But I don't know how to see if there
is a performance change.
Is there a quick cpu bench ?
I used:
time for {1..10000}; do echo -n; done
It's a bit bogus - I expect it would show if my 630Mhz processor jumped
to 900Mhz, but smaller changes might be lost in noise.
<http://pavelmachek.livejournal.com/77425.html> suggests "time factor
$[65863223*65863159]", which should be better.
I think it's also significant that the current (630Mhz) setting is "1".
I would expect "0" to be slower - but in the original 701 BIOS, 630Mhz
is the slower of the two speeds, right?
1 - time factor: ~ 1.574s - default, seems to be 630Mhz
0 - time factor: ~ 1.01s - seems to be 900
How illogical :-). Oh - I should have read the commit message, this is
the expected order (and proper SHE just has the extra state: 2 /
"performance").
Perhaps we should DMI-blacklist 701s with newer BIOS versions, so we
only provide the performance control when it is available from the BIOS
setup screen. The specific version is well-documented e.g. on
forum.eeeuser.com.
Thanks for your time
Alan
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