Have tried the following upstream kernel 2.6.34-999-generic #201004281008 - same issue - see this snippet of the log Apr 28 21:03:40 ubuntu-laptop kernel: [ 33.353905] rt2500pci 0000:03:00.0: PCI INT A -> Link[LNKA] -> GSI 10 (level, low) -> IRQ 10 Apr 28 21:03:40 ubuntu-laptop kernel: [ 33.353935] ------------[ cut here ]------------ Apr 28 21:03:40 ubuntu-laptop kernel: [ 33.353947] WARNING: at /home/kernel-ppa/mainline/build/drivers/pci/pci.c:105 pci_ioremap_bar+0x51/0x60() Apr 28 21:03:40 ubuntu-laptop kernel: [ 33.353951] Hardware name: Satellite A30 Apr 28 21:03:40 ubuntu-laptop kernel: [ 33.353953] Modules linked in: rt2500pci(+) rt2x00pci binfmt_misc rt2x00lib led_class snd_intel8x0(+) snd_ac97_codec mac80211 ppdev ac97_bus cfg80211 eeprom_93cx6 snd_pcm_oss snd_mixer_oss snd_pcm snd_seq_dummy pcmcia snd_seq_oss snd_seq_midi joydev snd_rawmidi snd_seq_midi_event yenta_socket rsrc_nonstatic snd_seq pcmcia_core lp psmouse serio_raw snd_timer snd_seq_device shpchp parport snd soundcore snd_page_alloc fbcon tileblit font bitblit softcursor usbhid hid i915 drm_kms_helper 8139too ohci1394 8139cp drm i2c_algo_bit intel_agp mii ieee1394 video agpgart output Apr 28 21:03:40 ubuntu-laptop kernel: [ 33.354007] Pid: 871, comm: modprobe Tainted: G M W 2.6.34-999-generic #201004281008 Apr 28 21:03:40 ubuntu-laptop kernel: [ 33.354010] Call Trace: Apr 28 21:03:40 ubuntu-laptop kernel: [ 33.354017] [] ? pci_ioremap_bar+0x51/0x60 Apr 28 21:03:40 ubuntu-laptop kernel: [ 33.354025] [] warn_slowpath_common+0x81/0xa0 Apr 28 21:03:40 ubuntu-laptop kernel: [ 33.354029] [] ? pci_ioremap_bar+0x51/0x60 Apr 28 21:03:40 ubuntu-laptop kernel: [ 33.354033] [] warn_slowpath_null+0x1a/0x20 Apr 28 21:03:40 ubuntu-laptop kernel: [ 33.354037] [] pci_ioremap_bar+0x51/0x60 Apr 28 21:03:40 ubuntu-laptop kernel: [ 33.354044] [] rt2x00pci_alloc_reg+0x1a/0xa0 [rt2x00pci] Apr 28 21:03:40 ubuntu-laptop kernel: [ 33.354049] [] rt2x00pci_probe+0x143/0x20f [rt2x00pci] Apr 28 21:03:40 ubuntu-laptop kernel: [ 33.354057] [] ? mutex_lock+0x19/0x40 Apr 28 21:03:40 ubuntu-laptop kernel: [ 33.354062] [] local_pci_probe+0x13/0x20 Apr 28 21:03:40 ubuntu-laptop kernel: [ 33.354066] [] pci_call_probe+0x1c/0x20 Apr 28 21:03:40 ubuntu-laptop kernel: [ 33.354070] [] __pci_device_probe+0x54/0x60 Apr 28 21:03:40 ubuntu-laptop kernel: [ 33.354074] [] pci_device_probe+0x2b/0x50 Apr 28 21:03:40 ubuntu-laptop kernel: [ 33.354080] [] really_probe+0x51/0x130 Apr 28 21:03:40 ubuntu-laptop kernel: [ 33.354085] [] ? pm_runtime_barrier+0x4c/0xb0 Apr 28 21:03:40 ubuntu-laptop kernel: [ 33.354090] [] driver_probe_device+0x3c/0x60 Apr 28 21:03:40 ubuntu-laptop kernel: [ 33.354093] [] __driver_attach+0x7a/0x80 Apr 28 21:03:40 ubuntu-laptop kernel: [ 33.354097] [] bus_for_each_dev+0x49/0x70 Apr 28 21:03:40 ubuntu-laptop kernel: [ 33.354101] [] driver_attach+0x1e/0x20 Apr 28 21:03:40 ubuntu-laptop kernel: [ 33.354105] [] ? __driver_attach+0x0/0x80 Apr 28 21:03:40 ubuntu-laptop kernel: [ 33.354108] [] bus_add_driver+0xbb/0x1f0 Apr 28 21:03:40 ubuntu-laptop kernel: [ 33.354115] [] ? kset_find_obj+0x57/0x70 Apr 28 21:03:40 ubuntu-laptop kernel: [ 33.354119] [] ? pci_device_shutdown+0x0/0x30 Apr 28 21:03:40 ubuntu-laptop kernel: [ 33.354122] [] ? pci_device_shutdown+0x0/0x30 Apr 28 21:03:40 ubuntu-laptop kernel: [ 33.354126] [] driver_register+0x52/0xd0 Apr 28 21:03:40 ubuntu-laptop kernel: [ 33.354132] [] ? tracepoint_module_notify+0x27/0x30 Apr 28 21:03:40 ubuntu-laptop kernel: [ 33.354136] [] __pci_register_driver+0x45/0x90 Apr 28 21:03:40 ubuntu-laptop kernel: [ 33.354143] [] ? rt2500pci_init+0x0/0x19 [rt2500pci] Apr 28 21:03:40 ubuntu-laptop kernel: [ 33.354148] [] rt2500pci_init+0x17/0x19 [rt2500pci] Apr 28 21:03:40 ubuntu-laptop kernel: [ 33.354152] [] do_one_initcall+0x2c/0x190 Apr 28 21:03:40 ubuntu-laptop kernel: [ 33.354158] [] sys_init_module+0x99/0x1f0 Apr 28 21:03:40 ubuntu-laptop kernel: [ 33.354162] [] sysenter_do_call+0x12/0x28 Apr 28 21:03:40 ubuntu-laptop kernel: [ 33.354165] ---[ end trace 93d72a36b9146f24 ]--- Apr 28 21:03:40 ubuntu-laptop kernel: [ 33.354180] rt2500pci 0000:03:00.0: PCI INT A disabled Apr 28 21:03:40 ubuntu-laptop kernel: [ 33.354188] rt2500pci: probe of 0000:03:00.0 failed with error -12 Apr 28 21:03:40 ubuntu-laptop kernel: [ 33.480047] intel8x0_measure_ac97_clock: measured 54327 usecs (2618 samples) Apr 28 21:03:40 ubuntu-laptop kernel: [ 33.480053] intel8x0: clocking to 48000