https://bugzilla.kernel.org/show_bug.cgi?id=21762

           Summary: Reboot on power cable plug in/remove
           Product: ACPI
           Version: 2.5
    Kernel Version: at least 2.6.31.14 to 2.6.36
          Platform: All
        OS/Version: Linux
              Tree: Mainline
            Status: NEW
          Severity: normal
          Priority: P1
         Component: Other
        AssignedTo: [email protected]
        ReportedBy: [email protected]
        Regression: No


Created an attachment (id=35892)
 --> (https://bugzilla.kernel.org/attachment.cgi?id=35892)
ver_linux output, kernel config, modules list, and other possibly interesting
stuff

My notebook is a Samsung P560-AS04DE. When I unplug the power cord (or plug it
in), the system does a hard reboot. I tested the following kernels:

- v2.6.36 from linux-2.6.git with config from arch linux 2.6.35.8 package
- arch linux's build of 2.6.35.8
- arch linux's build of 2.6.31
- arch linux's build of 2.6.32.25
- v2.6.31.14 from linux-2.6.git with config from arch linux 2.6.31 kernel
package does NOT BOOT AT ALL and ends with a panic which is longer than the
screen, also is unrelated to my issue as v2.6.36 from git works (apart from the
ACPI issue)

and the issue seems identical on all of them. Interestingly, Ubuntu 9.10's
2.6.31 kernel does not exhibit this problem, so this might rather be an issue
that can be worked around by the kernel config (or is worked around by one of
Ubuntu's patches). So I attached the kernel config I tested last (of
v2.6.31.14).

Other actions that trigger an instant reboot (likely related, as these are ACPI
modules):

modprobe processor
modprobe video

Well-intentioned workarounds that will not help me:
- acpi=off (then for some critical devices like the SATA controller, no
interrupts are allocated and thus the system cannot boot)
- acpi=ht (crash still happens)
- BIOS upgrade (the updater requires Windows, and I do not have a Windows
partition and not even free space where I could install Windows - also, ReactOS
won't boot on this notebook and the Samsung BIOS upgrader is known to not work
within BartPE)

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