Well, there are 3 different issues with the 1005PE model, which are
related.

First, Win7 compatible bios, check if the eeepc-laptop module is loaded:
lsmod | grep eee
If not, you'll need this kernel parameter:
acpi_osi=Linux

Second, to fix the brightness, another parameter:
acpi_backlight=vendor

Finally, the actual bug, as described in acpi4asus git:
http://git.iksaif.net/?p=acpi4asus.git;a=commit;h=ced69c59811f05b2f8378467cbb82ac6ed3c6a5a
To work around the problem, disable hotplugging with this parameter:
eeepc_laptop.hotplug_disabled=1

Summarizing, add the needed parameters to your Grub, see below, and update:
GRUB_CMDLINE_LINUX_DEFAULT="quiet splash acpi_osi=Linux acpi_backlight=vendor 
eeepc_laptop.hotplug_disabled=1"

Happy hacking.

-- 
[Lucid] [EeePC 1005PE] Wi-Fi disable hotkey kills both Wi-Fi and ethernet
https://bugs.launchpad.net/bugs/557048
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