[Debian-eeepc-devel] Super Hybrid Engine on eeepc 901c with kernel 2.6.31-6

[Darren Salt]

I demand that Shawn Lamson may or may not have written...

> On Thu, 17 Dec 2009 23:21:04 +0000
> Darren Salt <linux at youmustbejoking.demon.co.uk> wrote:
>> I demand that Shawn Lamson may or may not have written...
>>> On Thu, 17 Dec 2009 14:24:10 +0000
>>> Darren Salt <linux at youmustbejoking.demon.co.uk> wrote:
>>>> I demand that Shawn Lamson may or may not have written...
>> [snip; SHE-triggered freeze while on mains]
>>>>> Has anyone else seen this issue?
>>>> Some 700-series users. Never before a 901 user or, for that matter, any
>>>> user of _any_ Atom-based model (that I know of); my 901's certainly
>>>> never shown a problem.
>>>> OOI, which BIOS version? (I'm using 2103.)
>>> it's ASUS 901 ACPI BIOS Revision 1703
>> Hmm. I don't recall exactly which BIOS version was present when I first
>> tested S.H.E. support... I say upgrade.

> according to this page there is no newer bios for 901
> http://update.eeepc.asus.com/bios/
> is there some other source for them?

ftp://ftp.asus.com.tw/pub/asus/EeePC/EeePC901/901-ASUS-2103.zip

>>>> Your kernel configuration may also be relevant.
>>>> [snip]

> which particular values would you think would impact it?

ACPI, I2C, cpufreq are most likely.

>>> Also - I double checked and the boot message [about setting the S.H.E.
>>> state] appears regardless of the BIOS setting, but flipping the "Intel
>>> Speed Step Tech" definitely triggers the behavior ...
>> This is looking like a different problem. Which cpufreq driver is loaded,
>> and which governor are you using? (ACPI & ondemand, in my case.)

> acpi_cpufreq? and I never set the governor, so I am assuming by default it
> is using ondemand (that is the one reported to be in use by cpufreq-info)

That should be fine, then...

> I tried booting up on battery with the speed step option enabled in bios,
> verified everything was working okay, then rmmod the acpi_cpufreq module..
> of course CPU frequency was no longer being reported nor controlled after
> the rmmod, but if I plugged in to AC the box didn't freeze up.

That's... odd. However, I have these built-in, which may be relevant (but
shouldn't be).

[snip]
> is there an alternative to this module, or some tweaking that can be done
> to it, or a log to look at to get more info?

All that I can think of right now is to make use of netconsole and a
convenient Ethernet cable. There's no guarantee that it'll help, though.
http://www.mjmwired.net/kernel/Documentation/networking/netconsole.txt

[snip]
-- 
| Darren Salt            | linux at youmustbejoking | nr. Ashington, | Doon
| using Debian GNU/Linux | or ds    ,demon,co,uk    | Northumberland | Army
| + Vermin Media = Internet Surveillance Partner of HM Govt. ENCRYPT!

Artificial intelligence is no match for natural stupidity.