I can comfirm this also. This happens for me after the machine has been up for 10 or so minutes and I loose ndiswrapper functionality (the wireless card wont respond).
Turning off Hyperthreading functionality allows the machine to keep running without issue. When this occurs I get the following trace in the kernel log [17180332.336000] BUG: soft lockup detected on CPU#1! [17180332.336000] <c01491df> softlockup_tick+0x9f/0xf0 <c012bee1> update_process_times+0x31/0x80 [17180332.336000] <c0114d13> smp_apic_timer_interrupt+0x53/0x60 <c010413c> apic_timer_interrupt+0x1c/0x30 [17180332.336000] <c026007b> pci_early_fixup_cyrix_5530+0x2b/0x50 <f8bbb884> ExInterlockedPopEntrySList+0x84/0xb0 [ndiswrapper] [17180332.336000] <f8bc7175> tx_worker+0x585/0x700 [ndiswrapper] <c0132702> run_workqueue+0x72/0xf0 [17180332.336000] <f8bc6bf0> tx_worker+0x0/0x700 [ndiswrapper] <c01332e7> worker_thread+0x117/0x140 [17180332.336000] <c011bde0> default_wake_function+0x0/0x10 <c01331d0> worker_thread+0x0/0x140 [17180332.336000] <c0135f8b> kthread+0xab/0xe0 <c0135ee0> kthread+0x0/0xe0 [17180332.336000] <c0101005> kernel_thread_helper+0x5/0x10 Here is a cat /proc/cpuinfo for more details processor : 0 vendor_id : GenuineIntel cpu family : 15 model : 2 model name : Intel(R) Pentium(R) 4 CPU 2.80GHz stepping : 5 cpu MHz : 2793.501 cache size : 512 KB fdiv_bug : no hlt_bug : no f00f_bug : no coma_bug : no fpu : yes fpu_exception : yes cpuid level : 2 wp : yes flags : fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov pat pse36 clflush dts acpi mmx fxsr sse sse2 ss ht tm pbe up cid xtpr bogomips : 5592.27 ** Attachment added: "Kernel log" http://librarian.launchpad.net/4558217/dmesg.log -- BUG: soft lockup detected on CPU#0! https://launchpad.net/bugs/60053 -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
