HowTo Linux Driver (PODHD Pro X or others)

[kroa38]

# Running PODHD Pro X under linux

 

Because we love linux !

Tested on : Ubuntu 22-04 (jammy)

 

## 1) Get the righ ID of the PODHD PRO X:

 

run the command :

```

> sudo dmesg | grep 'idVendor=0e41'

[ 3239.784010] usb 3-1.3.1: New USB device found, idVendor=0e41, idProduct=415a, bcdDevice= 0.00

```

0x0e41 = Line 6 Manufacturer ID

__0x415a__ = __PODHD Pro X ID__

 

## 2) Linux kernel source

 

Get your current kernel version:

```

> uname -r

6.8.0-47-generic

```

Download the most closest version of your kernel:

For me is 6.8.0 and extract under __/usr/src/__

```

> wget https://mirrors.edge.kernel.org/pub/linux/kernel/v6.x/linux-6.6.8.tar.gz

> tar -xvf linux-6.6.8.tar.gz

> mv linx-6.6.8/ /usr/src/.

```

 

## 3) Make Module Prepare

Remove root permission

```

> cd /usr/src/

> chown -R $(whoami):$(whoami) linux_6.8.0/

```

Copy your current kernel config inside the source

```

> cd /usr/src/linux_6.8.0

> cp /boot/config-$(uname -r) .config

```

make module_prepare

```

> cd /usr/src/linux_6.8.0

> cp /boot/config-$(uname -r) .config

> make oldconfig

> make modules_prepare

```

 

## 4) Modify PODHD. C file

 

For working you have to simply modify the value of LINE6_PODHDDESKTOP inside the file :

> linux-6.8.0/sound/usb/line6/podhd.c

 

> replace __0x4156__ by __0x415a__

 

```

/* table of devices that work with this driver */

static const struct usb_device_id podhd_id_table[] = {

/* TODO: no need to alloc data interfaces when only audio is used */

{ LINE6_DEVICE(0x5057), .driver_info = LINE6_PODHD300 },

{ LINE6_DEVICE(0x5058), .driver_info = LINE6_PODHD400 },

{ LINE6_IF_NUM(0x414D, 0), .driver_info = LINE6_PODHD500 },

{ LINE6_IF_NUM(0x414A, 0), .driver_info = LINE6_PODX3 },

{ LINE6_IF_NUM(0x414B, 0), .driver_info = LINE6_PODX3LIVE },

{ LINE6_IF_NUM(0x4159, 0), .driver_info = LINE6_PODHD500X },

{ LINE6_IF_NUM(0x415a, 0), .driver_info = LINE6_PODHDDESKTOP },

{}

};

```

## 5) Rebuild module

 

```

> cd linux-6.8.0/sound/usb/line6

> make -C /lib/modules/$(uname -r)/build M=$(pwd) modules

```

if all is ok you have successfully build the modules for the PODHD Pro X.

```

> ll *.ko

-rw-r--r-- 1 root root 1567408 Oct 23 15:56 snd-usb-line6.ko

-rw-r--r-- 1 root root 418600 Oct 23 16:22 snd-usb-podhd.ko

-rw-r--r-- 1 root root 417152 Oct 23 15:56 snd-usb-pod.ko

-rw-r--r-- 1 root root 438232 Oct 23 15:56 snd-usb-toneport.ko

-rw-r--r-- 1 root root 384128 Oct 23 15:56 snd-usb-variax.ko

```

## 6) unload old module .

 

verify if you have line modules loaded

```

> sudo lsmod | grep snd_usb

snd_usb_podhd 16384 0

snd_usb_line6 49152 3 snd_usb_podhd

snd_usb_audio 499712 5

snd_usbmidi_lib 53248 1 snd_usb_audio

snd_hwdep 20480 3 snd_usb_audio,snd_hda_codec,snd_usb_line6

snd_ump 45056 1 snd_usb_audio

snd_rawmidi 57344 4 snd_seq_midi,snd_usbmidi_lib,snd_usb_line6,snd_ump

mc 81920 1 snd_usb_audio

 

```

For me __snd_usb_pod_hd__ and __snd_usb_line6__ must be unloaded

 

```

> sudo rmmod snd_usb_podhd

> sudo rmmod snd_usb_line6

```

## 7) Insert new module.

 

Insert first line6 and after podhd

```

> sudo insmod ./snd-usb-line6.ko

> sudo insmod ./snd-usb-podhd.ko

```

 

## 8) Big thanks to :

Markus Grabner <grabner@icg.tugraz.at> who is at the origin of this driver.

 

README.md podhd.c