Use "io-audio -dintel_hda" or "io-audio" “waitfor /dev/snd" / "mount -Tio-audio intel_hda" command, my audio driver 
all will run with error. 
   Use "slog2info" command, the slog info for io-audio as following:
# slog2info
Jan 07 05:58:05.434                 io_audio.32789                 slog*     0  [1] ado_ducking_read_config_data(874): 
No policy conf file specified
Jan 07 05:58:05.438              io_audio.32789..0              pci_log*     0  INFO ,1,0,3 [32789:1]: SLOG module load 
successful for pid 32789 (io-audio)
Jan 07 05:58:05.438              io_audio.32789..0              pci_log      0  INFO ,1,1,3 [32789:1]: Successful 
connection to PCI server on /dev/pci
Jan 07 05:58:05.438              io_audio.32789..0              pci_log      0  INFO ,1,0,3 [32789:1]: Attempt module 
load of /lib/dll/pci/pci_hw-Intel_x86.so
Jan 07 05:58:05.439              io_audio.32789..0              pci_log      0  INFO ,1,0,3 [32789:1]: Module is 
compatible with Library ver 2.0
Jan 07 05:58:05.439              io_audio.32789..0              pci_log      0  INFO ,1,0,3 [32789:1]: Module /lib/dll/
pci/pci_hw-Intel_x86.so, v2.0 loaded successfully
Jan 07 05:58:05.440              io_audio.32789..0              pci_log      0  INFO ,1,0,3 [32789:1]: Attempt module 
load of /lib/dll/pci/pci_debug2.so
Jan 07 05:58:05.441              io_audio.32789..0              pci_log      0  INFO ,1,0,3 [32789:1]: Module /lib/dll/
pci/pci_debug2.so, v2.0 loaded successfully
Jan 07 05:58:05.441              io_audio.32789..1              pci_dbg*     0  DEBUG,1,1,3 [32789:1]: find_ecam_base():
 trying offset 0x60 for vid/did 8086/f00
Jan 07 05:58:05.441              io_audio.32789..1              pci_dbg      0  DEBUG,1,1,3 [32789:1]: find_ecam_base():
 regval is 0x0
Jan 07 05:58:05.441              io_audio.32789..1              pci_dbg      0  DEBUG,1,1,3 [32789:1]: find_ecam_base():
 trying offset 0x48 for vid/did 8086/f00
Jan 07 05:58:05.441              io_audio.32789..1              pci_dbg      0  DEBUG,1,1,3 [32789:1]: find_ecam_base():
 regval is 0x0
Jan 07 05:58:05.441              io_audio.32789..1              pci_dbg      0  DEBUG,1,1,3 [32789:1]: find_ecam_base():
 trying addr 0xe0000000 for vid/did 8086/f00
Jan 07 05:58:05.441              io_audio.32789..1              pci_dbg      0  DEBUG,1,1,3 [32789:1]: find_ecam_base():
 found ecam base 0xe0000000
Jan 07 05:58:05.441              io_audio.32789..0              pci_log      0  INFO ,1,0,3 [32789:1]: Capability 
modules will be searched for in directory /lib/dll/pci
Jan 07 05:58:05.441              io_audio.32789..0              pci_log      0  INFO ,1,0,3 [32789:1]: Attempt module 
load of /lib/dll/pci/pci_cap-0x05-80860f04.so
Jan 07 05:58:05.441              io_audio.32789..0              pci_log      0  ERROR,0,0,3 [32789:1]: dlopen_mod(), 
dlopen() error: Library cannot be found
Jan 07 05:58:05.441              io_audio.32789..0              pci_log      0  INFO ,1,0,3 [32789:1]: Re-attempt module
 load of /lib/dll/pci/pci_cap-0x05.so
Jan 07 05:58:05.442              io_audio.32789..0              pci_log      0  INFO ,1,0,3 [32789:1]: Module is 
compatible with Library ver 2.0
Jan 07 05:58:05.442              io_audio.32789..0              pci_log      0  INFO ,1,0,3 [32789:1]: Module /lib/dll/
pci/pci_cap-0x05.so, v2.0 loaded successfully
Jan 07 05:58:05.442              io_audio.32789..0              pci_log      0  INFO ,1,1,3 [32789:1]: B0:D27:F0 - Check
 for /lib/dll/pci/pci_cap-0x05-80860f04.so ... not found
Jan 07 05:58:05.442              io_audio.32789..0              pci_log      0  INFO ,1,1,3 [32789:1]: B0:D27:F0 - Found
 /lib/dll/pci/pci_cap-0x05.so
Jan 07 05:58:05.442              io_audio.32789..1              pci_dbg      0  DEBUG,1,0,3 [32789:1]: 
_mod_msi_read_cap(B0:D27:F0, 0x60, 80c4898=0)
Jan 07 05:58:05.442              io_audio.32789..1              pci_dbg      0  DEBUG,1,0,3 [32789:1]: 
_cap_msi_get_nirq(80bd088) returns 1
Jan 07 05:58:05.442    ...