http://bugzilla.kernel.org/show_bug.cgi?id=11884

           Summary: No battery status information on HP EliteBook 2730p
           Product: ACPI
           Version: 2.5
     KernelVersion: 2.6.27.4
          Platform: All
        OS/Version: Linux
              Tree: Mainline
            Status: NEW
          Severity: normal
          Priority: P1
         Component: Power-Battery
        AssignedTo: [EMAIL PROTECTED]
        ReportedBy: [EMAIL PROTECTED]
                CC: [EMAIL PROTECTED]


Latest working kernel version:    N/A
Earliest failing kernel version:  2.6.27.4
Distribution:                     Debian Lenny (testing)
Hardware Environment:
  HP 2730p tablet PC laptop, Core2 Duo CPU L9400  @1.86GHz, 4GB RAM

Software Environment:
  Fresh install of Debian Lenny/testing with vanilla 2.6.27.4 kernel
  from www.kernel.org The only change made is the intel_agp patch from
  http://intellinuxgraphics.org/download.html (the system hangs up 
  otherwise).

Problem Description:
  ACPI doesn't provide battery status. In fact, the directory
  /proc/acpi/battery is missing completely. dmesg shows multiple
  ACPI errors during the boot time of the type
      ACPI Error (psparse-0530): Method parse/execution failed
[\_SB_.BAT0._BIF] (Node f7446ba8), AE_TIME

  All kernels prior to 2.6.27 that I've tried boot with apci=off option
  only (with only one core recognized), so I don't know whether this
  problem existed in earlier versions. I found several bug reports about
  similar problems on other types of laptops, but they all were supposed
  to be fixed in 2.6.27 by now. By the way, temperature sensors at several
  zones and frequency scaling work.

Steps to reproduce:
  Boot the laptop. I'm going to attach the outputs of dmesg, lcpci, and 
  acpidump to this bug report for more details. I'm not sure which other
  information might be useful.

Thank you,

   --- Alex.


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