https://bugzilla.novell.com/show_bug.cgi?id=678097 https://bugzilla.novell.com/show_bug.cgi?id=678097#c0 Summary: Deadlock after: ACPI Error: [CB04] Namespace lookup failure, AE_ALREADY_EXISTS Classification: openSUSE Product: openSUSE 11.4 Version: Factory Platform: x86 OS/Version: Other Status: NEW Severity: Normal Priority: P5 - None Component: Kernel AssignedTo: kernel-maintainers@forge.provo.novell.com ReportedBy: trenn@novell.com QAContact: qa@suse.de Found By: --- Blocker: --- Created an attachment (id=418291) --> (http://bugzilla.novell.com/attachment.cgi?id=418291) acpidump - I double checked dynamically loaded SSDT[2-5]s, CB04 only shows up in the \_SB_.AMW0.WMCA function in the DSDT User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:2.0b10) Gecko/20110121 Firefox/4.0b10 On this machine the acpi wmi method \_SB_.AMW0.WMCA is called frequently (about every second?) when acer-wmi driver is loaded. acer-wmi driver exports software rfkill interfaces to switch off bluetooth/wlan. I could trigger this bug by doing: rfkill block 1 which I expect causes the WMCA function to get called in parallel triggering the issue. Acpica already points to a firmware bug (method must be defined NotSerialized?), the full error log I get is: ACPI Error: [CB04] Namespace lookup failure, AE_ALREADY_EXISTS (20101013/dsfield-143) ACPI Error: Method parse/execution failed [\_SB_.AMW0.WMCA] (Node ffff8800b8b034e8), AE_ALREADY_EXISTS (20101013/psparse-537) ACPI: Marking method WMCA as Serialized because of AE_ALREADY_EXISTS error This looks harmless and expected, but acpica seems to get stuck in a deadlock. The rfkill blocks and is not "killable", even not with -9. echo w >/proc/sysrq-trigger # (show-blocked-tasks(W)) reveals: SysRq : Show Blocked State task PC stack pid father worker/1:0 D 0000000000000001 0 8341 2 0x00000000 ffff880096413a40 0000000000000046 ffff8800964139e8 0000000000012640 ffff880096413fd8 0000000000012640 ffff880096413fd8 ffff880096413fd8 ffff880090f6e8b0 0000000000012640 0000000000012640 ffff880096412000 all Trace: [<ffffffff81521ffd>] schedule_timeout+0x28d/0x310 [<ffffffff81523035>] __down_timeout+0x65/0xb0 [<ffffffff8107f72c>] down_timeout+0x5c/0x70 [<ffffffff812ba026>] acpi_os_wait_semaphore+0x8e/0x130 [<ffffffff812d2373>] acpi_ex_system_wait_mutex+0x3b/0x84 [<ffffffff812c76a4>] acpi_ds_begin_method_execution+0xdf/0x16f [<ffffffff812df024>] acpi_ps_execute_method+0x39/0x2dd [<ffffffff812d90a3>] acpi_ns_evaluate+0x183/0x2c5 [<ffffffff812d89a9>] acpi_evaluate_object+0x158/0x298 [<ffffffffa01d5f85>] wmi_evaluate_method+0x115/0x150 [wmi] [<ffffffffa02a41ae>] WMI_execute_u32+0x4e/0xa0 [acer_wmi] [<ffffffffa02a4681>] get_u32+0x71/0xf0 [acer_wmi] [<ffffffffa02a4885>] acer_rfkill_update+0x35/0xa0 [acer_wmi] [<ffffffff81074630>] process_one_work+0x110/0x490 [<ffffffff81075345>] worker_thread+0x165/0x340 [<ffffffff81079956>] kthread+0x96/0xa0 [<ffffffff81003d74>] kernel_thread_helper+0x4/0x10 fkill D 0000000000000001 0 8780 6316 0x00000004 ffff8800adb0bad8 0000000000000082 000000000001c000 0000000000012640 ffff8800adb0bfd8 0000000000012640 ffff8800adb0bfd8 ffff8800adb0bfd8 ffff880037b4e6f0 0000000000012640 0000000000012640 ffff8800adb0a000 all Trace: [<ffffffff81521ffd>] schedule_timeout+0x28d/0x310 [<ffffffff81523035>] __down_timeout+0x65/0xb0 [<ffffffff8107f72c>] down_timeout+0x5c/0x70 [<ffffffff812ba026>] acpi_os_wait_semaphore+0x8e/0x130 [<ffffffff812d2373>] acpi_ex_system_wait_mutex+0x3b/0x84 [<ffffffff812c76a4>] acpi_ds_begin_method_execution+0xdf/0x16f [<ffffffff812df024>] acpi_ps_execute_method+0x39/0x2dd [<ffffffff812d90a3>] acpi_ns_evaluate+0x183/0x2c5 [<ffffffff812d89a9>] acpi_evaluate_object+0x158/0x298 [<ffffffffa01d5f85>] wmi_evaluate_method+0x115/0x150 [wmi] [<ffffffffa02a41ae>] WMI_execute_u32+0x4e/0xa0 [acer_wmi] [<ffffffffa02a424b>] WMID_set_u32+0x4b/0xf0 [acer_wmi] [<ffffffffa02a4389>] set_u32+0x99/0xc0 [acer_wmi] [<ffffffffa02a4486>] acer_rfkill_set+0x16/0x30 [acer_wmi] [<ffffffffa00e8f60>] rfkill_set_block+0x80/0x100 [rfkill] [<ffffffffa00e935f>] rfkill_fop_write+0x12f/0x150 [rfkill] [<ffffffff81152406>] vfs_write+0xc6/0x180 [<ffffffff8115271e>] sys_write+0x4e/0x90 [<ffffffff81002f8b>] system_call_fastpath+0x16/0x1b [<00007fd1a64280f0>] 0x7fd1a64280f0 Reproducible: Always Steps to Reproduce: 1. 2. 3. -- Configure bugmail: https://bugzilla.novell.com/userprefs.cgi?tab=email ------- You are receiving this mail because: ------- You are on the CC list for the bug.