Hi All, We've had a report [1] from a user that the 3.1.6 kernel panics if they plug or unplug their machine. The oops seems to come from an issue somewhere in the acpi notification stack. The relevant backtrace functions are (transcribed from a jpeg): acpi_ac_notify acpi_device_notify acpi_ev_notify_dispatch acpi_os_execute_deferred Looking at the dmesg during boot, it seems this machine is also triggering an oops for duplicate registration of an ACAD device. You can find the backtraces for that below. Looking at the acpidump output [2], I noticed that there is indeed two Device(ACAD) entries in the DSDT. The first is under the system bus and the second is under PCI0. The problem seems to stem from some Notify(ACAD) entries, but ACAD is ambiguous. I'm guessing the ACPI code is getting an event for the device that wasn't set up properly? I'm by no means an ACPI expert, so I'd really appreciate thoughts and review. josh [1] https://bugzilla.redhat.com/show_bug.cgi?id=772730 [2] https://bugzilla.redhat.com/attachment.cgi?id=551677 Duplicate device oopses: ACPI: Deprecated procfs I/F for AC is loaded, please retry with CONFIG_ACPI_PROCFS_POWER cleared [ 2.766097] ACPI: AC Adapter [ACAD] (off-line) [ 2.826203] ACPI: Deprecated procfs I/F for AC is loaded, please retry with CONFIG_ACPI_PROCFS_POWER cleared [ 2.826231] ------------[ cut here ]------------ [ 2.826253] WARNING: at fs/proc/generic.c:586 proc_register+0x10f/0x1f0() [ 2.826261] Hardware name: Inspiron 1090 [ 2.826268] proc_dir_entry 'ac_adapter/ACAD' already registered [ 2.826275] Modules linked in: [ 2.826287] Pid: 1, comm: swapper Not tainted 3.1.6-1.fc16.x86_64 #1 [ 2.826295] Call Trace: [ 2.826315] [<ffffffff8106b73f>] warn_slowpath_common+0x7f/0xc0 [ 2.826359] [<ffffffff8106b836>] warn_slowpath_fmt+0x46/0x50 [ 2.826373] [<ffffffff811d5bbf>] proc_register+0x10f/0x1f0 [ 2.826387] [<ffffffff811d619f>] proc_mkdir_mode+0x3f/0x60 [ 2.826400] [<ffffffff811d61d6>] proc_mkdir+0x16/0x20 [ 2.826414] [<ffffffff8132b5e8>] acpi_ac_add+0xc2/0x1b8 [ 2.826429] [<ffffffff81308d22>] acpi_device_probe+0x4e/0x11c [ 2.826444] [<ffffffff8138ba2c>] driver_probe_device+0x9c/0x2b0 [ 2.826456] [<ffffffff8138bceb>] __driver_attach+0xab/0xb0 [ 2.826469] [<ffffffff8138bc40>] ? driver_probe_device+0x2b0/0x2b0 [ 2.826483] [<ffffffff8138bc40>] ? driver_probe_device+0x2b0/0x2b0 [ 2.826497] [<ffffffff8138a8ac>] bus_for_each_dev+0x5c/0x90 [ 2.826510] [<ffffffff8138b63e>] driver_attach+0x1e/0x20 [ 2.826523] [<ffffffff8138b240>] bus_add_driver+0x1b0/0x2a0 [ 2.826539] [<ffffffff81bb06ad>] ? acpi_initialize_subsystem+0xa9/0xa9 [ 2.826551] [<ffffffff8138c246>] driver_register+0x76/0x140 [ 2.826563] [<ffffffff81063070>] ? try_to_wake_up+0x290/0x290 [ 2.826576] [<ffffffff81bb06ad>] ? acpi_initialize_subsystem+0xa9/0xa9 [ 2.826590] [<ffffffff813095a4>] acpi_bus_register_driver+0x43/0x45 [ 2.826603] [<ffffffff81bb06e0>] acpi_ac_init+0x33/0x4f [ 2.826617] [<ffffffff81002042>] do_one_initcall+0x42/0x180 [ 2.826632] [<ffffffff81b7ecf3>] kernel_init+0xde/0x158 [ 2.826644] [<ffffffff810636d7>] ? schedule_tail+0x27/0xb0 [ 2.826659] [<ffffffff815dee34>] kernel_thread_helper+0x4/0x10 [ 2.826672] [<ffffffff81b7ec15>] ? start_kernel+0x3c0/0x3c0 [ 2.826685] [<ffffffff815dee30>] ? gs_change+0x13/0x13 [ 2.826706] ---[ end trace 82bc55f036371117 ]--- [ 2.826762] ------------[ cut here ]------------ [ 2.826776] WARNING: at fs/sysfs/dir.c:455 sysfs_add_one+0xc1/0xf0() [ 2.826784] Hardware name: Inspiron 1090 [ 2.826790] sysfs: cannot create duplicate filename '/class/power_supply/ACAD' [ 2.826797] Modules linked in: [ 2.826808] Pid: 1, comm: swapper Tainted: G W 3.1.6-1.fc16.x86_64 #1 [ 2.826815] Call Trace: [ 2.826829] [<ffffffff8106b73f>] warn_slowpath_common+0x7f/0xc0 [ 2.826842] [<ffffffff8106b836>] warn_slowpath_fmt+0x46/0x50 [ 2.826855] [<ffffffff811e2411>] sysfs_add_one+0xc1/0xf0 [ 2.826869] [<ffffffff811e2dc5>] sysfs_do_create_link+0x135/0x220 [ 2.826881] [<ffffffff811e1561>] ? sysfs_add_file_mode+0x61/0xb0 [ 2.826895] [<ffffffff811e2ec3>] sysfs_create_link+0x13/0x20 [ 2.826908] [<ffffffff81388b06>] device_add+0x2b6/0x680 [ 2.826923] [<ffffffff812aa3e8>] ? kobject_set_name+0x38/0x40 [ 2.826938] [<ffffffff814514a8>] power_supply_register+0xf8/0x140 [ 2.826952] [<ffffffff8132b6ae>] acpi_ac_add+0x188/0x1b8 [ 2.826965] [<ffffffff81308d22>] acpi_device_probe+0x4e/0x11c [ 2.826979] [<ffffffff8138ba2c>] driver_probe_device+0x9c/0x2b0 [ 2.826991] [<ffffffff8138bceb>] __driver_attach+0xab/0xb0 [ 2.827004] [<ffffffff8138bc40>] ? driver_probe_device+0x2b0/0x2b0 [ 2.827052] [<ffffffff8138bc40>] ? driver_probe_device+0x2b0/0x2b0 [ 2.827066] [<ffffffff8138a8ac>] bus_for_each_dev+0x5c/0x90 [ 2.827079] [<ffffffff8138b63e>] driver_attach+0x1e/0x20 [ 2.827092] [<ffffffff8138b240>] bus_add_driver+0x1b0/0x2a0 [ 2.827106] [<ffffffff81bb06ad>] ? acpi_initialize_subsystem+0xa9/0xa9 [ 2.827118] [<ffffffff8138c246>] driver_register+0x76/0x140 [ 2.827129] [<ffffffff81063070>] ? try_to_wake_up+0x290/0x290 [ 2.827143] [<ffffffff81bb06ad>] ? acpi_initialize_subsystem+0xa9/0xa9 [ 2.827156] [<ffffffff813095a4>] acpi_bus_register_driver+0x43/0x45 [ 2.827169] [<ffffffff81bb06e0>] acpi_ac_init+0x33/0x4f [ 2.827182] [<ffffffff81002042>] do_one_initcall+0x42/0x180 [ 2.827195] [<ffffffff81b7ecf3>] kernel_init+0xde/0x158 [ 2.827207] [<ffffffff810636d7>] ? schedule_tail+0x27/0xb0 [ 2.827221] [<ffffffff815dee34>] kernel_thread_helper+0x4/0x10 [ 2.827234] [<ffffffff81b7ec15>] ? start_kernel+0x3c0/0x3c0 [ 2.827247] [<ffffffff815dee30>] ? gs_change+0x13/0x13 [ 2.827255] ---[ end trace 82bc55f036371118 ]--- [ 2.887119] ACPI: AC Adapter [ACAD] (off-line) -- To unsubscribe from this list: send the line "unsubscribe linux-acpi" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
