When booting up my Lenovo W510 I get the message below in my kernel logs: [ 1.940859] ------------[ cut here ]------------ [ 1.940872] WARNING: at /build/buildd/linux-2.6.32/arch/x86/kernel/hpet.c:392 hpet_next_event+0x7a/0x90() [ 1.940878] Hardware name: 4318CTO [ 1.940881] Modules linked in: [ 1.940887] Pid: 0, comm: swapper Not tainted 2.6.32-14-generic #20-Ubuntu [ 1.940892] Call Trace: [ 1.940895] <IRQ> [<ffffffff81064f7b>] warn_slowpath_common+0x7b/0xc0 [ 1.940910] [<ffffffff81064fd4>] warn_slowpath_null+0x14/0x20 [ 1.940917] [<ffffffff810375da>] hpet_next_event+0x7a/0x90 [ 1.940924] [<ffffffff81037620>] hpet_legacy_next_event+0x10/0x20 [ 1.940932] [<ffffffff81090f84>] clockevents_program_event+0x54/0xa0 [ 1.940940] [<ffffffff810924b8>] tick_dev_program_event+0x48/0xd0 [ 1.940948] [<ffffffff81091c7a>] tick_handle_oneshot_broadcast+0xfa/0x120 [ 1.940957] [<ffffffff8101668f>] timer_interrupt+0x1f/0x30 [ 1.940966] [<ffffffff810c2f70>] handle_IRQ_event+0x60/0x170 [ 1.940973] [<ffffffff810c53a2>] handle_edge_irq+0xd2/0x170 [ 1.940982] [<ffffffff81015d52>] handle_irq+0x22/0x30 [ 1.940989] [<ffffffff81563bdc>] do_IRQ+0x6c/0xf0 [ 1.940995] [<ffffffff81013b53>] ret_from_intr+0x0/0x11 [ 1.940997] <EOI> [<ffffffff813086c0>] ? acpi_idle_enter_bm+0x283/0x2b7 [ 1.941006] [<ffffffff813086b9>] ? acpi_idle_enter_bm+0x27c/0x2b7 [ 1.941011] [<ffffffff8144c567>] ? cpuidle_idle_call+0xa7/0x140 [ 1.941015] [<ffffffff81011ea3>] ? cpu_idle+0xb3/0x110 [ 1.941021] [<ffffffff81558aad>] ? start_secondary+0xa8/0xaa [ 1.941029] ---[ end trace 00bd7667d48b98b5 ]--- The system seems to work ok but it does have issues with suspend/resume which may be related.
Lenovo released a BIOS update for these machines earlier this month. After installing the update I no longer see these warnings.