[Bug 576511] [NEW] ACPI causes computer to hang when connected to network

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I am using Ubuntu 10.4 (but the problem probably exists since 7.10 at
least). I use a broadband modem to connect to the Internet, to which my
computer is connected via an ethernet (RJ45) cable.

Steps to reproduce :
 1. Unplug ethernet cable from computer ;
 2. Turn computer on ;
 3. Boot ubuntu (2.6.32-21-generic) with acpi support enabled (ie. not explicitly disabled) ;
 4. When logged in, plug ethernet cable into computer.

Result : the network-manager icon starts animating (to indicate
activity), and the computer hangs after less than 1 second ; there is no
response to any stimulus (except hard poweroff).

This problem also arises if I prevent Gnome, its network manager and GDM
to automatically launch and start the network manually.

However, this problem does not arise if Ubuntu is booted with the
options "acpi=off noacpi" added to the boot command.

** Affects: linux (Ubuntu)
     Importance: Undecided
         Status: Incomplete

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ACPI causes computer to hang when connected to network
https://bugs.edge.launchpad.net/bugs/576511
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