http://bugzilla.kernel.org/show_bug.cgi?id=9998
Summary: sbs-related problems in 2.6.24
Product: ACPI
Version: 2.5
KernelVersion: 2.6.24.2
Platform: All
OS/Version: Linux
Tree: Mainline
Status: NEW
Severity: normal
Priority: P1
Component: Power-Battery
AssignedTo: [EMAIL PROTECTED]
ReportedBy: [EMAIL PROTECTED]
Latest working kernel version: 2.6.23 (with genpatches 6 and tuxonice)
Earliest failing kernel version: 2.6.24.2
Distribution: Gentoo
Hardware Environment: Acer Travelmate 4002 (with Smart Battery)
Problem Description:
When I first booted 2.6.24 (config based on the working one from 2.6.23) it
paniced. I figured it was a problem with the Smart Battery-Code, so I compiled
it as a module (CONFIG_ACPI_SBS=m), hoping to be able to get the trace when I
load the module.
Indeed the kernel booted without problem this time. The module loaded just fine
as well. But I lose keypresses if (and only if) the module is loaded.
I remember this behaviour (lost keypresses, not sure about the panic) from
earlier kernel-versions (forgot which one(s)), when Smart Battery-support was
just introduced.
Maybe I should note, that the DSDT is buggy.
Here's what I wrote down on a paper when the kernel paniced on boot:
BUG: unable to handle paging request at virtual address ...
printing eip: ...
Oops: 0002 [#1] PREEMPT
Modules linked in:
Pid: 1, comm: swapper Not tainted (2.6.24.2)
...
Call trace:
mutex_lock
acpi_smbus_transaction
ida_get_new_above
sysfs_ilookup_test
acpi_smbus_read
acpi_ac_get_present
acpi_sbs_add
...
EIP: __mutex_lock_slowpath
end trace
note: swapper[1] exited with preempt_count 1
Kernel panic - not syncing: Attempted to kill init!
Switched to NOHz mode on CPU #0
I hope this very incomplete output is a little useful.
Steps to reproduce:
1. compile and install kernel with CONFIG_ACPI_SBS=y
2. reboot
3. see the panic
4. compile and install kernel with CONFIG_ACPI_SBS=m
5. reboot
6. modprobe sbs
7. type something, some letters/keys are missing
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