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

[Shawn Lamson]

On Sat, 19 Dec 2009 14:18:13 +0000
Darren Salt <linux at youmustbejoking.demon.co.uk> wrote:

updates:

BIOS 2103 is actually worse... with it on the 2.6.31-6 kernel
now it seems the HyperThreading feature, when enabled in BIOS
and booting up on AC power is a no go.  Already booting up with
Speed-Step enabled and on AC power didn't work.  

I tried the stock 2.6.32-trunk-686 kernel and this also would
not boot on AC power with SpeedStep enabled, and it would not
resume from "hibernate" (closing the lid) ... instead I just
get a blinking cursor on a black screen, if I close again, or
hit Alt+Power (saw that one online somewhere) then it briefly
resumes but freezes up right after.

I am attempting to compile a kernel from the 2.6.31-9 source
with the ACPI, I2C, and CPUFREQ built-in instead of as modules.
First attempt didn't work :)  giving me a message such as 
"unknown filesystem" and a kernel panic when it tries to access
hd sda(0,1)... i'll keep trying to get the kernel config right.

Shawn

> 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]


-- 
Shawn Lamson
shawn.lamson at gmail.com