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

[Darren Salt]

I demand that Alan Jenkins may or may not have written...

> On 12/9/09, Darren Salt <linux at youmustbejoking.demon.co.uk> wrote:
>> I demand that Alan Jenkins may or may not have written...
>> [snip]
>>> If I repeatedly plug and unplug the power adaptor with eeepc-acpi-scripts
>>> installed  (triggering the switch between "performance" and "normal"), I
>>> see various kernel messages.  These are the kernel init messages for the
>>> webcam and cardreader, suggesting that they are disappearing and
>>> re-appearing.  I wasn't able to reproduce it without eeepc-acpi-scripts
>>> (either by plugging / unplugging repeatedly, or by toggling the value of
>>> cpufv in a scripted loop, or by both at the same time).
>> Strange. Some logging may provide some clue; are ACPI events which would
>> be used to toggle these being generated?

> I'm not sure what you mean.  There's no code in the eeepc-laptop driver to
> receive events for these settings.  (And I'm pretty sure that my userspace
> doesn't touch the "cardr" or "camera" files in /sys).  What am I looking
> for?

Well... for the camera, it could be eeepc-acpi-scripts which is reacting to
ACPI events. But the card reader would require that there be local changes
for its apparent presence to be toggled.

# sh -x /etc/acpi/actions/ac_adapter.sh . . 00000080 00000000
(fake unplugging)

# sh -x /etc/acpi/actions/ac_adapter.sh . . 00000080 00000001
(fake plugging in)

... anything unusual?

(That script ignores the first two parameters.)

-- 
| Darren Salt            | linux at youmustbejoking | nr. Ashington, | Doon
| using Debian GNU/Linux | or ds    ,demon,co,uk    | Northumberland | Army
| + http://wiki.debian.org/DebianEeePC/

Do not tell big lies. Small ones can be just as effective.