http://bugzilla.kernel.org/show_bug.cgi?id=10432
Summary: Freeze during docking
Product: ACPI
Version: 2.5
KernelVersion: 2.6.25-rc8
Platform: All
OS/Version: Linux
Tree: Mainline
Status: NEW
Severity: normal
Priority: P1
Component: Config-Hotplug
AssignedTo: [EMAIL PROTECTED]
ReportedBy: [EMAIL PROTECTED]
Latest working kernel version: 2.6.21
Earliest failing kernel version: 2.6.22
Distribution: Ubuntu
Hardware Environment: Dell Latitude D600, D/Dock docking station
Software Environment: Ubuntu 7.10
Problem Description:
The laptop freezes shortly after docking. This started as an Ubuntu bug which I
have now reproduced using a mainline kernel:
https://bugs.launchpad.net/bugs/41091
My initial testing suggests that the problem occurs when CONFIG_SLUB is
defined, but does not occur with CONFIG_SLAB. I have tested this using the
Ubuntu 2.6.22 and 2.6.24 kernels, and the mainline 2.6.25-rc8.
Steps to reproduce:
Build a kernel with the ACPI dock module, and with CONFIG_SLUB.
Boot the laptop docked.
Undock - no problem.
Dock - the laptop freezes, though sysrq still works.
Forcibly undock - the laptop returns to life, sufficient to extract dmesg logs
and cleanly shutdown.
I have some extra debugging information. Adding trace printk statements to
dock.c reveals that shortly after I insert the laptop into the dock, the kernel
calls dock_notify(). dock_notify() uses dock_present() to test for the docking
station. dock_present() returns 0, which causes dock_notify() to return. The
kernel then calls dock_notify() again, and the process repeats.
I have also captured a sysrq-t during a freeze, and the acpi tasks are below:
[ 583.952325] kacpid R running 0 42 2
[ 583.952325] f64e25b0 00000046 c03a63d6 00000004 c03ac9ec c0133f54
f64e270c f64e270c
[ 583.952325] c180b200 f7572a80 c0455080 c0455080 c0455080 f64bb210
f4d4a238 c0213480
[ 583.952325] f64bb214 c0133f6d c03d4200 c0455080 00000246 c0137470
f64bb21c f64bb210
[ 583.952325] Call Trace:
[ 583.952325] [<c0133f54>] run_workqueue+0x74/0x100
[ 583.952325] [<c0213480>] acpi_os_execute_deferred+0x0/0x25
[ 583.952325] [<c0133f6d>] run_workqueue+0x8d/0x100
[ 583.952325] [<c0137470>] prepare_to_wait+0x20/0x70
[ 583.952325] [<c01347c0>] worker_thread+0x0/0xf0
[ 583.952325] [<c013488f>] worker_thread+0xcf/0xf0
[ 583.952325] [<c01372c0>] autoremove_wake_function+0x0/0x50
[ 583.952325] [<c01347c0>] worker_thread+0x0/0xf0
[ 583.952325] [<c0136fd2>] kthread+0x42/0x70
[ 583.952325] [<c0136f90>] kthread+0x0/0x70
[ 583.952325] [<c0105f77>] kernel_thread_helper+0x7/0x10
[ 583.952325] =======================
[ 583.952325] kacpi_notify R running 0 43 2
[ 583.952325] f754d2cc c03a6f05 000000ff 00000000 00000087 00000000
00000000 00000000
[ 583.952325] 00000001 00000087 00000000 00000000 00000000 00000000
f6432370 c021ee44
[ 583.952325] f4c511dc f754d2c0 c03a6874 00000008 f754d2cc 00000000
00000000 00000008
[ 583.952325] Call Trace:
[ 583.952325] [<c021ee44>] acpi_ex_write_data_to_field+0x386/0x3c6
[ 583.952325] [<c0224dc8>] acpi_ex_store_object_to_node+0x10c/0x1ff
[ 583.952325] [<c02252da>] acpi_ex_store+0x8a/0x3bc
[ 583.952325] [<c0221e2b>] acpi_ex_opcode_1A_1T_1R+0x3f6/0x584
[ 583.952325] [<c02165bf>] acpi_ds_exec_end_op+0x131/0x54e
[ 583.952325] [<c022e207>] acpi_ps_parse_loop+0x908/0xb2d
[ 583.952325] [<c022d082>] acpi_ps_parse_aml+0xd8/0x303
[ 583.952325] [<c022eb80>] acpi_ps_execute_method+0x179/0x26d
[ 583.952325] [<c022a1f8>] acpi_ns_evaluate+0x15c/0x20c
[ 583.952325] [<c0229b20>] acpi_evaluate_object+0x1ac/0x294
[ 583.952325] [<c0213e6e>] acpi_evaluate_integer+0x54/0xfc
[ 583.952325] [<c0213e96>] acpi_evaluate_integer+0x7c/0xfc
[ 583.952325] [<c0213480>] acpi_os_execute_deferred+0x0/0x25
[ 583.952325] [<f8866098>] dock_present+0x1b/0x30 [dock]
[ 583.952325] [<c02373f9>] acpi_bus_notify+0x17/0x1bd
[ 583.952325] [<f88668d2>] dock_notify+0x2b/0xb9 [dock]
[ 583.952325] [<c021b947>] acpi_ev_notify_dispatch+0x51/0x5a
[ 583.952325] [<c021349d>] acpi_os_execute_deferred+0x1d/0x25
[ 583.952325] [<c0133f54>] run_workqueue+0x74/0x100
[ 583.952325] [<c0137470>] prepare_to_wait+0x20/0x70
[ 583.952325] [<c01347c0>] worker_thread+0x0/0xf0
[ 583.952325] [<c013485c>] worker_thread+0x9c/0xf0
[ 583.952325] [<c01372c0>] autoremove_wake_function+0x0/0x50
[ 583.952325] [<c01347c0>] worker_thread+0x0/0xf0
[ 583.952325] [<c0136fd2>] kthread+0x42/0x70
[ 583.952325] [<c0136f90>] kthread+0x0/0x70
[ 583.952325] [<c0105f77>] kernel_thread_helper+0x7/0x10
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