Hi, I have a D945GCLF2 with Ubuntu 8.10. I had fan control enabled too, and it led to freezes when load was high. I have now disabled automatic fan control and I'll see how it goes. Anyway, here's my syslog attached. Dec 29 00:46:32 marsupilami kernel: [ 1090.924507] ======================= Dec 29 00:47:37 marsupilami kernel: [ 1156.420506] BUG: soft lockup - CPU#1 stuck for 61s! [kacpid:71] Dec 29 00:47:37 marsupilami kernel: [ 1156.420506] Modules linked in: isofs udf crc_itu_t nls_iso8859_1 nls_cp437 vfat fat usb_storage libusual ipv6 af_packet i915 drm binfmt_misc sco bridge rfcomm stp bnep l2cap bluetooth ppdev cpufreq_conservative cpufreq_powersave cpufreq_userspace cpufreq_ondemand cpufreq_stats freq_table wmi pci_slot container sbs sbshc video output battery iptable_filter ip_tables x_tables ac lp snd_hda_intel snd_pcm_oss snd_mixer_oss snd_pcm evdev snd_seq_dummy parport_pc parport snd_seq_oss snd_seq_midi snd_rawmidi snd_seq_midi_event button pcspkr iTCO_wdt iTCO_vendor_support snd_seq snd_timer snd_seq_device snd intel_agp agpgart soundcore snd_page_alloc shpchp pci_hotplug ext3 jbd mbcache sd_mod crc_t10dif sr_mod cdrom sg ata_piix usbhid hid ata_generic sata_promise pata_acpi libata uhci_hcd ehci_hcd scsi_mod dock usbcore r8169 thermal processor fan fbcon tileblit font bitblit softcursor fuse Dec 29 00:47:37 marsupilami kernel: [ 1156.420506] Dec 29 00:47:37 marsupilami kernel: [ 1156.420506] Pid: 71, comm: kacpid Not tainted (2.6.27-7-generic #1) Dec 29 00:47:37 marsupilami kernel: [ 1156.420506] EIP: 0060:[] EFLAGS: 00000246 CPU: 1 Dec 29 00:47:37 marsupilami kernel: [ 1156.420506] EIP is at acpi_os_release_object+0x8/0x11 Dec 29 00:47:37 marsupilami kernel: [ 1156.420506] EAX: c04a1594 EBX: ef080960 ECX: c2207d08 EDX: ef080960 Dec 29 00:47:37 marsupilami kernel: [ 1156.420506] ESI: ef080e60 EDI: 00000000 EBP: f74d9e6c ESP: f74d9e6c Dec 29 00:47:37 marsupilami kernel: [ 1156.420506] DS: 007b ES: 007b FS: 00d8 GS: 0000 SS: 0068 Dec 29 00:47:37 marsupilami kernel: [ 1156.420506] CR0: 8005003b CR2: 0a454330 CR3: 00515000 CR4: 00000690 Dec 29 00:47:37 marsupilami kernel: [ 1156.420506] DR0: 00000000 DR1: 00000000 DR2: 00000000 DR3: 00000000 Dec 29 00:47:37 marsupilami kernel: [ 1156.420506] DR6: ffff0ff0 DR7: 00000400 Dec 29 00:47:37 marsupilami kernel: [ 1156.420506] [] acpi_ps_free_op+0x21/0x23 Dec 29 00:47:37 marsupilami kernel: [ 1156.420506] [] acpi_ps_delete_parse_tree+0x38/0x50 Dec 29 00:47:37 marsupilami kernel: [ 1156.420506] [] acpi_ps_complete_this_op+0x13c/0x155 Dec 29 00:47:37 marsupilami kernel: [ 1156.420506] [] acpi_ps_complete_op+0x23/0x1f1 Dec 29 00:47:37 marsupilami kernel: [ 1156.420506] [] ? acpi_ds_delete_result_if_not_used+0x52/0x59 Dec 29 00:47:37 marsupilami kernel: [ 1156.420506] [] ? acpi_ds_exec_end_op+0x35a/0x379 Dec 29 00:47:37 marsupilami kernel: [ 1156.420506] [] acpi_ps_parse_loop+0x278/0x2ab Dec 29 00:47:37 marsupilami kernel: [ 1156.420506] [] acpi_ps_parse_aml+0x72/0x260 Dec 29 00:47:37 marsupilami kernel: [ 1156.420506] [] acpi_ps_execute_method+0x121/0x1da Dec 29 00:47:37 marsupilami kernel: [ 1156.420506] [] acpi_ns_evaluate+0x133/0x18c Dec 29 00:47:37 marsupilami kernel: [ 1156.420506] [] acpi_ev_asynch_execute_gpe_method+0xb0/0xf7 Dec 29 00:47:37 marsupilami kernel: [ 1156.420506] [] ? acpi_os_execute_deferred+0x0/0x31 Dec 29 00:47:37 marsupilami kernel: [ 1156.420506] [] acpi_os_execute_deferred+0x25/0x31 Dec 29 00:47:37 marsupilami kernel: [ 1156.420506] [] run_workqueue+0x95/0x160 Dec 29 00:47:37 marsupilami kernel: [ 1156.420506] [] ? finish_wait+0x16/0x70 Dec 29 00:47:37 marsupilami kernel: [ 1156.420506] [] worker_thread+0x88/0xf0 Dec 29 00:47:37 marsupilami kernel: [ 1156.420506] [] ? autoremove_wake_function+0x0/0x50 Dec 29 00:47:37 marsupilami kernel: [ 1156.420506] [] ? worker_thread+0x0/0xf0 Dec 29 00:47:37 marsupilami kernel: [ 1156.420506] [] kthread+0x41/0x80 Dec 29 00:47:37 marsupilami kernel: [ 1156.420506] [] ? kthread+0x0/0x80 Dec 29 00:47:37 marsupilami kernel: [ 1156.420506] [] kernel_thread_helper+0x7/0x10 Dec 29 00:47:37 marsupilami kernel: [ 1156.420506] =======================