I can confirmed this bug. 2.6.24-12-generic i686 00:1b.0 Audio device: Intel Corporation 82801G (ICH7 Family) High Definition Audio Controller (rev 02) messages log recorded: Mar 10 22:43:11 -laptop kernel: [ 24.798738] snd: Unknown symbol unregister_sound_special Mar 10 22:43:11 -laptop kernel: [ 24.798899] snd: Unknown symbol register_sound_special_device Mar 10 22:43:11 -laptop kernel: [ 24.799355] snd: Unknown symbol sound_class Mar 10 22:43:11 -laptop kernel: [ 24.799925] snd_timer: Unknown symbol snd_info_register Mar 10 22:43:11 -laptop kernel: [ 24.800041] snd_timer: Unknown symbol snd_info_free_entry Mar 10 22:43:11 -laptop kernel: [ 24.800138] snd_timer: Unknown symbol snd_verbose_printk Mar 10 22:43:11 -laptop kernel: [ 24.800200] snd_timer: Unknown symbol snd_iprintf Mar 10 22:43:11 -laptop kernel: [ 24.800272] snd_timer: Unknown symbol snd_ecards_limit Mar 10 22:43:11 -laptop kernel: [ 24.800340] snd_timer: Unknown symbol snd_oss_info_register Mar 10 22:43:11 -laptop kernel: [ 24.800386] snd_timer: Unknown symbol snd_unregister_device Mar 10 22:43:11 -laptop kernel: [ 24.800442] snd_timer: Unknown symbol snd_device_new Mar 10 22:43:11 -laptop kernel: [ 24.800555] snd_timer: Unknown symbol snd_register_device_for_dev Mar 10 22:43:11 -laptop kernel: [ 24.866594] snd_pcm: Unknown symbol snd_info_register Mar 10 22:43:11 -laptop kernel: [ 24.866659] snd_pcm: Unknown symbol snd_info_create_module_entry Mar 10 22:43:11 -laptop kernel: [ 24.866754] snd_pcm: Unknown symbol snd_timer_notify Mar 10 22:43:11 -laptop kernel: [ 24.866817] snd_pcm: Unknown symbol snd_timer_interrupt Mar 10 22:43:11 -laptop kernel: [ 24.866864] snd_pcm: Unknown symbol snd_info_free_entry Mar 10 22:43:11 -laptop kernel: [ 24.866911] snd_pcm: Unknown symbol snd_add_device_sysfs_file Mar 10 22:43:11 -laptop kernel: [ 24.866971] snd_pcm: Unknown symbol snd_info_get_str Mar 10 22:43:11 -laptop kernel: [ 24.867096] snd_pcm: Unknown symbol snd_verbose_printk Mar 10 22:43:11 -laptop kernel: [ 24.867201] snd_pcm: Unknown symbol snd_ctl_register_ioctl Mar 10 22:43:11 -laptop kernel: [ 24.867248] snd_pcm: Unknown symbol snd_card_file_add Mar 10 22:43:11 -laptop kernel: [ 24.867311] snd_pcm: Unknown symbol snd_iprintf Mar 10 22:43:11 -laptop kernel: [ 24.867389] snd_pcm: Unknown symbol snd_major Mar 10 22:43:11 -laptop kernel: [ 24.867513] snd_pcm: Unknown symbol snd_unregister_device Mar 10 22:43:11 -laptop kernel: [ 24.867567] snd_pcm: Unknown symbol snd_timer_new Mar 10 22:43:11 -laptop kernel: [ 24.867614] snd_pcm: Unknown symbol snd_device_new Mar 10 22:43:11 -laptop kernel: [ 24.867701] snd_pcm: Unknown symbol snd_ctl_unregister_ioctl Mar 10 22:43:11 -laptop kernel: [ 24.867781] snd_pcm: Unknown symbol snd_lookup_minor_data Mar 10 22:43:11 -laptop kernel: [ 24.867848] snd_pcm: Unknown symbol snd_info_create_card_entry Mar 10 22:43:11 -laptop kernel: [ 24.867895] snd_pcm: Unknown symbol snd_power_wait Mar 10 22:43:11 -laptop kernel: [ 24.867950] snd_pcm: Unknown symbol snd_device_free Mar 10 22:43:11 -laptop kernel: [ 24.868034] snd_pcm: Unknown symbol snd_card_file_remove Mar 10 22:43:11 -laptop kernel: [ 24.868081] snd_pcm: Unknown symbol snd_register_device_for_dev Mar 10 22:43:11 -laptop kernel: [ 24.868206] snd_pcm: Unknown symbol snd_device_register Mar 10 22:43:11 -laptop kernel: [ 24.868257] snd_pcm: Unknown symbol snd_info_get_line Mar 10 22:43:11 -laptop kernel: [ 24.918586] ACPI: WMI-Acer: Mapper loaded Mar 10 22:43:11 -laptop kernel: [ 24.990860] snd_hda_intel: Unknown symbol snd_ctl_add Mar 10 22:43:11 -laptop kernel: [ 24.990930] snd_hda_intel: Unknown symbol snd_pcm_new Mar 10 22:43:11 -laptop kernel: [ 24.990993] snd_hda_intel: Unknown symbol snd_pcm_limit_hw_rates Mar 10 22:43:11 -laptop kernel: [ 24.991046] snd_hda_intel: Unknown symbol snd_card_register Mar 10 22:43:11 -laptop kernel: [ 24.991094] snd_hda_intel: Unknown symbol snd_card_free Mar 10 22:43:11 -laptop kernel: [ 24.991141] snd_hda_intel: Unknown symbol snd_pcm_lib_preallocate_pages_for_all Mar 10 22:43:11 -laptop kernel: [ 24.991189] snd_hda_intel: Unknown symbol snd_card_proc_new Mar 10 22:43:11 -laptop kernel: [ 24.991365] snd_hda_intel: Unknown symbol snd_ctl_find_id Mar 10 22:43:11 -laptop kernel: [ 24.991431] snd_hda_intel: Unknown symbol snd_verbose_printk Mar 10 22:43:11 -laptop kernel: [ 24.991518] snd_hda_intel: Unknown symbol snd_ctl_new1 Mar 10 22:43:11 -laptop kernel: [ 24.991629] snd_hda_intel: Unknown symbol snd_component_add Mar 10 22:43:11 -laptop kernel: [ 24.991694] snd_hda_intel: Unknown symbol snd_card_new Mar 10 22:43:11 -laptop kernel: [ 24.991742] snd_hda_intel: Unknown symbol snd_iprintf Mar 10 22:43:11 -laptop kernel: [ 24.991795] snd_hda_intel: Unknown symbol snd_pcm_lib_malloc_pages Mar 10 22:43:11 -laptop kernel: [ 24.991843] snd_hda_intel: Unknown symbol snd_ctl_boolean_mono_info Mar 10 22:43:11 -laptop kernel: [ 24.991910] snd_hda_intel: Unknown symbol snd_pcm_lib_ioctl Mar 10 22:43:11 -laptop kernel: [ 24.991964] snd_hda_intel: Unknown symbol snd_pcm_lib_free_pages Mar 10 22:43:11 -laptop kernel: [ 24.992012] snd_hda_intel: Unknown symbol snd_hwdep_new Mar 10 22:43:11 -laptop kernel: [ 24.992085] snd_hda_intel: Unknown symbol snd_pcm_set_ops Mar 10 22:43:11 -laptop kernel: [ 24.992146] snd_hda_intel: Unknown symbol snd_pcm_hw_constraint_list Mar 10 22:43:11 -laptop kernel: [ 24.992210] snd_hda_intel: Unknown symbol snd_device_new Mar 10 22:43:11 -laptop kernel: [ 24.992287] snd_hda_intel: Unknown symbol snd_pcm_suspend_all Mar 10 22:43:11 -laptop kernel: [ 24.992357] snd_hda_intel: Unknown symbol snd_card_disconnect Mar 10 22:43:11 -laptop kernel: [ 24.992404] snd_hda_intel: Unknown symbol snd_pcm_hw_constraint_integer Mar 10 22:43:11 -laptop kernel: [ 24.992531] snd_hda_intel: Unknown symbol snd_pci_quirk_lookup Mar 10 22:43:11 -laptop kernel: [ 24.992645] snd_hda_intel: Unknown symbol snd_pcm_period_elapsed Mar 10 22:43:11 -laptop kernel: [ 24.992692] snd_hda_intel: Unknown symbol snd_pcm_hw_constraint_step Mar 10 22:43:11 -laptop kernel: [ 24.992775] snd_hda_intel: Unknown symbol snd_pcm_format_width