[Bugme-new] [Bug 13552] New: Kernel panic when resuming from suspend by pressing left-ctrl + left-shift keys together more than once

[bugzilla-daemon at bugzilla.kernel.org]

http://bugzilla.kernel.org/show_bug.cgi?id=13552

           Summary: Kernel panic when resuming from suspend by pressing
                    left-ctrl + left-shift keys together more than once
           Product: Power Management
           Version: 2.5
    Kernel Version: 2.6.26, 2.6.28, 2.6.29, 2.6.30
          Platform: All
        OS/Version: Linux
              Tree: Mainline
            Status: NEW
          Severity: normal
          Priority: P1
         Component: Hibernation/Suspend
        AssignedTo: power-management_other at kernel-bugs.osdl.org
        ReportedBy: amikkili at ecn.purdue.edu
                CC: amikkili at ecn.purdue.edu
        Regression: No


Created an attachment (id=21942)
 --> (http://bugzilla.kernel.org/attachment.cgi?id=21942)
tarball containing additional system information as noted in the description

Toshiba U405-S2833 laptop. Machine suspends properly and resumes properly when
any one key is pressed once. Machine "wakes up" when both the left-ctrl and
left-shift key are pressed together multiple times but the screen does not turn
on and the caps-lock light starts flashing. Machine is unresponsive at this
point.

I can reproduce this on kernel versions 2.6.{26,28,29,30}, Debian and Ubuntu
(all versions released since June 2008), by suspending the machine (power light
turns orange and slowly flashes), and quickly pressing both the left-ctrl and
left-shift keys repeatedly (at least twice) to resume at which point the
caps-lock light immediately starts flashing. Resuming with any other key
combination seems to work properly.

Since the screen is blank when resuming, I do not know whether any error
messages appear before the kernel panic.

Several files are attached with more system information:

version - /proc/version
config-2.6.30 - current kernel configuration
dmesg.log - dmesg output
lsmod.log - lsmod output
lspci.log - lspci -vvv output
lsusb.log - lsusb -vvv output
ver_linux - output of scripts/ver_linux from kernel directory
cpuinfo - /proc/cpuinfo
ioports - /proc/ioports
iomem - /proc/iomem
dsdt - /proc/acpi/dsdt

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