------------[ cut here ]------------ WARNING: at /build/buildd/linux-2.6.35/arch/x86/include/asm/processor.h:1005 read_measured_perf_ctrs+0x6c/0x80() Hardware name: 1000HE Modules linked in: binfmt_misc parport_pc ppdev vboxnetadp vboxnetflt vboxdrv snd_hda_codec_realtek snd_hda_intel snd_hda_codec snd_hwdep snd_pcm snd_seq_midi snd_rawmidi snd_seq_midi_event arc4 snd_seq snd_timer snd_seq_device ath9k snd ath9k_common soundcore joydev i915 ath9k_hw ath drm_kms_helper mac80211 drm rt2860sta(C) cfg80211 snd_page_alloc crc_ccitt i2c_algo_bit video uvcvideo eeepc_laptop videodev intel_agp output psmouse serio_raw sparse_keymap led_class v4l1_compat agpgart lp parport usbhid hid atl1e Pid: 60, comm: kondemand/0 Tainted: G C 2.6.35-17-generic #23-Ubuntu Call Trace: [] warn_slowpath_common+0x72/0xa0 [] ? read_measured_perf_ctrs+0x6c/0x80 [] ? read_measured_perf_ctrs+0x6c/0x80 [] ? read_measured_perf_ctrs+0x0/0x80 [] warn_slowpath_null+0x22/0x30 [] read_measured_perf_ctrs+0x6c/0x80 [] ? read_measured_perf_ctrs+0x0/0x80 [] smp_call_function_single+0x72/0x130 [] cpufreq_get_measured_perf+0x2f/0xd0 [] ? cpufreq_cpu_get+0x8e/0xf0 [] ? get_cpu_iowait_time_us+0x6a/0xa0 [] __cpufreq_driver_getavg+0x6a/0x70 [] dbs_check_cpu+0x75/0x2e0 [] do_dbs_timer+0xa7/0xc0 [] ? schedule+0x37a/0x7a0 [] run_workqueue+0x8e/0x150 [] ? do_dbs_timer+0x0/0xc0 [] worker_thread+0x84/0xe0 [] ? autoremove_wake_function+0x0/0x50 [] ? worker_thread+0x0/0xe0 [] kthread+0x74/0x80 [] ? kthread+0x0/0x80 [] kernel_thread_helper+0x6/0x10 ---[ end trace 90a45ad90c7ee407 ]---