**from dmesg after loading imon module**

input: iMON Panel, Knob and Mouse(15c2:ffdc) as /devices/pci0000:00/0000:00:12.1/usb4/4-2/4-2:1.0/input/input6
imon 4-2:1.0: Unknown 0xffdc device, defaulting to VFD and iMON IR (id 0x00)
imon 4-2:1.0: imon_set_display_type: overriding display type to 1 via modparam
Registered IR keymap rc-imon-pad
input: iMON Remote (15c2:ffdc) as /devices/pci0000:00/0000:00:12.1/usb4/4-2/4-2:1.0/rc/rc1/input7
rc1: iMON Remote (15c2:ffdc) as /devices/pci0000:00/0000:00:12.1/usb4/4-2/4-2:1.0/rc/rc1
imon 4-2:1.0: iMON device (15c2:ffdc, intf0) on usb<4:3> initialized
usbcore: registered new interface driver imon
------------[ cut here ]------------
WARNING: at kernel/mutex-debug.c:78 debug_mutex_unlock+0xdb/0xe0()
Hardware name: Unknow
Modules linked in: rc_imon_pad imon sbs sbshc it87 hwmon_vid ipv6 reiserfs ext2 joydev hid_gyration usbhid hid rc_rc6_mce mce
usb nxt200x saa7134_alsa saa7134_dvb videobuf_dvb dvb_core r8712u(C) tuner_simple tuner_types snd_hda_codec_hdmi snd_hda_code
c_realtek ir_lirc_codec lirc_dev tuner ir_sony_decoder ir_jvc_decoder ir_rc6_decoder snd_seq_dummy ir_rc5_decoder snd_seq_oss
 snd_seq_midi_event snd_seq snd_seq_device ir_nec_decoder snd_pcm_oss snd_mixer_oss saa7134 r8169 v4l2_common mii videodev v4
l1_compat v4l2_compat_ioctl32 videobuf_dma_sg videobuf_core snd_hda_intel ir_common ir_core evdev tveeprom snd_hda_codec snd_
hwdep firewire_ohci firewire_core crc_itu_t ohci_hcd radeon snd_pcm snd_timer snd ehci_hcd wmi soundcore snd_page_alloc sg ps
mouse button edac_core usbcore serio_raw edac_mce_amd i2c_piix4 shpchp k8temp pci_hotplug ttm drm_kms_helper drm i2c_algo_bit
 i2c_core cpufreq_stats cpufreq_ondemand powernow_k8 freq_table processor mperf ext3 jbd mbcache sr_mod sd_mod cdrom ahci lib
ahci pata_atiixp pata_acpi libata scsi_mod
Pid: 5436, comm: ir-keytable Tainted: G         C  2.6.37-ARCH #1
Call Trace:
 [<ffffffff8105684a>] warn_slowpath_common+0x7a/0xb0
 [<ffffffff81056895>] warn_slowpath_null+0x15/0x20
 [<ffffffff810895eb>] debug_mutex_unlock+0xdb/0xe0
 [<ffffffff813a569d>] __mutex_unlock_slowpath+0x7d/0x140
 [<ffffffff813a5769>] mutex_unlock+0x9/0x10
 [<ffffffffa063f682>] send_packet+0x102/0x340 [imon]
 [<ffffffffa063f9fa>] imon_ir_change_protocol+0x7a/0x150 [imon]
 [<ffffffffa010a19b>] store_protocols+0x1eb/0x350 [ir_core]
 [<ffffffff812acafb>] dev_attr_store+0x1b/0x20
 [<ffffffff8119ef1f>] sysfs_write_file+0xcf/0x150
 [<ffffffff81135716>] vfs_write+0xc6/0x190
 [<ffffffff81135a2c>] sys_write+0x4c/0x80
 [<ffffffff8100bf12>] system_call_fastpath+0x16/0x1b
---[ end trace 4d9fede4654b3faa ]---

**from kernel.log after manually starting /etc/rc.d/lcdd (after long hang)**

Mar  8 14:33:28 localhost kernel: INFO: task LCDd:5766 blocked for more than 120 seconds.
Mar  8 14:33:28 localhost kernel: "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
Mar  8 14:33:28 localhost kernel: LCDd          D 00000001000152d1     0  5766      1 0x00000000
Mar  8 14:33:28 localhost kernel: ffff8800aec8bb68 0000000000000082 0000000000000001 ffff880000000000
Mar  8 14:33:28 localhost kernel: ffff8800bfa8f2e4 ffff88012b279bc0 ffff8800aec8bfd8 ffff8800aec8bfd8
Mar  8 14:33:28 localhost kernel: ffff8800aec8bfd8 ffff88012b279ea0 ffff8800aec8bfd8 ffff8800aec8a000
Mar  8 14:33:28 localhost kernel: Call Trace:
Mar  8 14:33:28 localhost kernel: [<ffffffff810ea8d5>] ? zone_watermark_ok+0x25/0xf0
Mar  8 14:33:28 localhost kernel: [<ffffffff810ea8d5>] ? zone_watermark_ok+0x25/0xf0
Mar  8 14:33:28 localhost kernel: [<ffffffff813a58a6>] __mutex_lock_slowpath+0x136/0x310
Mar  8 14:33:28 localhost kernel: [<ffffffff813a5a91>] mutex_lock+0x11/0x30
Mar  8 14:33:28 localhost kernel: [<ffffffffa0640293>] display_open+0x63/0x120 [imon]
Mar  8 14:33:28 localhost kernel: [<ffffffffa023309b>] usb_open+0xfb/0x2d0 [usbcore]
Mar  8 14:33:28 localhost kernel: [<ffffffff81139a4b>] chrdev_open+0x19b/0x2a0
Mar  8 14:33:28 localhost kernel: [<ffffffff811398b0>] ? chrdev_open+0x0/0x2a0
Mar  8 14:33:28 localhost kernel: [<ffffffff81133903>] __dentry_open+0x103/0x390
Mar  8 14:33:28 localhost kernel: [<ffffffff811ccb15>] ? devcgroup_inode_permission+0x125/0x150
Mar  8 14:33:28 localhost kernel: [<ffffffff81134bb1>] nameidata_to_filp+0x61/0x70
Mar  8 14:33:28 localhost kernel: [<ffffffff81143560>] do_last+0x480/0x7a0
Mar  8 14:33:28 localhost kernel: [<ffffffff81143a75>] do_filp_open+0x1f5/0x690
Mar  8 14:33:28 localhost kernel: [<ffffffff8114f284>] ? alloc_fd+0xf4/0x150
Mar  8 14:33:28 localhost kernel: [<ffffffff81134c24>] do_sys_open+0x64/0x110
Mar  8 14:33:28 localhost kernel: [<ffffffff81134ceb>] sys_open+0x1b/0x20
Mar  8 14:33:28 localhost kernel: [<ffffffff8100bf12>] system_call_fastpath+0x16/0x1b