[Debian-eeepc-devel] Bug#559578: Bug#559578: Bug#559578: eeepc-acpi-scripts: EeePC 701 freezes with garbled screen while booting

Ben Armstrong synrg at sanctuary.nslug.ns.ca
Sun Dec 6 16:13:04 UTC 2009


On Sun, 6 Dec 2009 13:10:14 +0100
Axel Beckert <abe at deuxchevaux.org> wrote:
> AFAIK there is (officially) _no_ high-speed mode on the 701.

Right.  However, they did build into the first model the ability to use
it.  They just didn't give any access to that feature when they shipped
it.  The similar 701SD model (same 900 MHz CPU) lists S.H.E. support
here:

http://eeepc.asus.com/global/product701sd.html

The model 701 des not:

http://eeepc.asus.com/global/product700.html

> It's a 900 MHz Celeron _permanently_ underclocked to 630 MHz. I
> remember there were some kernel module hacks to run it at 900 MHz

We don't support it via a hack.  The eeepc_laptop module which is a
standard part of the kernel now supports access to S.H.E.
via /sys/devices/platform/eeepc/cpufv for all models, whether or not
Asus lists support.

> nevertheless, but this was IIRC quite unreliable so I stopped using it
> after some tests. Can't remember the details what was bad about them,
> but I still know it caused far less problems (especially not reliably
> reproducable problems) than this one.

Given that Asus lists no support for this, perhaps we should patch
eeepc-acpi-scripts to detect model 701 and disable the setting by
default, only enabling it for all other models.

I have a model 4G and have been using S.H.E. performance mode while on
AC for some time.  I occasionally suffer lockups, but that could just
as well be due to the still immature support for KMS as anything else.
I'll try for a week to do without S.H.E. and see if the lockups cease.

Ben





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