i think it's a me, too. it happens about every 5th time when my laptop tries to wake up from sleep. it got introduced somewhat recently, because i keep my debian testing more or less up to date, and it started to happen about a month ago.
on debian testing, on a Dell Latitude E6320: Linux xxx 3.2.0-3-amd64 #1 SMP Thu Jun 28 09:07:26 UTC 2012 x86_64 GNU/Linux below are some pieces of backtraces that i copied by hand. unfortunately the screen gets updated every few seconds with different backtraces (of different CPU's?), so i could only copy portions of the backtraces. a newline below means its from a different backtrace. "watchdog detected hard lockup" warn_slowpath_fmt power_supply_am_i_supplied native_flush_tlb_others ... eventfd_ctx_read try_to_wake_up wq_worker_sleeping acpi_ns_evaluate arch_read_lock led_trigger_event menu_select cpuidle_idle_call CPU0: Intel(R) Core(TM) i7-2620M CPU @ 2.70GHz stepping 07 Performance Events: PEBS fmt1+, SandyBridge events, Intel PMU driver. PEBS disabled due to CPU errata. ... version: 3 ... bit width: 48 ... generic registers: 4 ... value mask: 0000ffffffffffff ... max period: 000000007fffffff ... fixed-purpose events: 3 ... event mask: 000000070000000f NMI watchdog enabled, takes one hw-pmu counter. Booting Node 0, Processors #1 NMI watchdog enabled, takes one hw-pmu counter. #2 NMI watchdog enabled, takes one hw-pmu counter. #3 NMI watchdog enabled, takes one hw-pmu counter. Brought up 4 CPUs Total of 4 processors activated (21550.18 BogoMIPS). ** Description changed: - Hello, - - Last updates caused a problem, when I restart computer, İt is freezing. - I saw that message at that moment "watchdog detected hard lockup on cpu - 1" + On the latest kernel (3.1 and up?) waking up from sleep may fail with + the message: "watchdog detected hard lockup on cpu 1" Ubuntu 12.04 x64 -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1004313 Title: watchdog detected hard lockup on cpu 1 To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+bug/1004313/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
