Trying cdemu userspace

Q.. · 07-15-2007, 04:09 AM

Appearently there is a new cdemu, I've compiled and installed all the needed things, then I get this error when trying to run cdemud (the daemon needed to use this whole thing)

Code:

Starting daemon locally; num_devices: 1; ctl_device: /dev/vhba_ctl; audio_backend: (null); audio_device: (null)
cdemud: cdemud_daemon_initialize: failed to open control device /dev/vhba_ctl!
Daemon initialization failed: Failed to open control device.

What's missing? Do I have to set something for the audio-device, audio-backend and so forth? If so what?

edit: ugh, nevermind, I forgot about the vhba-module package, but it's failing to compile for me:

Code:

/home/sou/vhba-module/vhba.c: In function ‘vhba_scan_devices’:
/home/sou/vhba-module/vhba.c:150: error: ‘i’ undeclared (first use in this function)
/home/sou/vhba-module/vhba.c:150: error: (Each undeclared identifier is reported only once
/home/sou/vhba-module/vhba.c:150: error: for each function it appears in.)
make[2]: *** [/home/sou/vhba-module/vhba.o] Error 1
make[1]: *** [_module_/home/sou/vhba-module] Error 2
make[1]: Leaving directory `/usr/src/linux-headers-2.6.22.1-rt2-hornet'
make: *** [vhba.o] Error 2

Any ideas?

GregLee · 07-16-2007, 01:33 PM

Yes. Edit vhba.c and add a line "int i;" before line 150 near the beginning of the function.

Q.. · 07-18-2007, 12:39 AM

Ok, it compiled and installed, but it doesn't want to work.
when trying to run cdemud:

Code:

Starting daemon locally; num_devices: 1; ctl_device: /dev/vhba_ctl; audio_backend: (null); audio_device: (null)
cdemud: cdemud_daemon_initialize: failed to get name on system bus!
Daemon initialization failed: Name request on D-BUS failed.

cdemu seems to be quite a mess, I guess I'll just have to wait, hopefully this will be easier to do later.

danellisuk · 11-27-2007, 05:42 PM

I get the same message. I cannot find any docs on how to start the daemon. Trying the following all fail:

Code:

:~$ cdemud
Daemon returned 1.

Code:

:~$ sudo cdemud
Daemon returned 0.

Code:

:~$ cdemud -n
Daemon initialization failed: Device initialization failed.

Code:

:~$ sudo cdemud -n
Daemon initialization failed: Name request on D-BUS failed.

You can see the module is loaded though:

Code:

:~$ lsmod | grep cdemu
cdemu                  33804  0 
cdrom                  37536  2 cdemu,ide_cd

I have run out of ideas now. I got this far, it seems a shame to give up. But hopefully someone else can shed some light.

Q.. · 11-28-2007, 04:39 AM

I assume you're trying to install the userspace-cdemu not v0.80? If so, then it does work fine on the stable kernel up to the current one (2.6.23.x).

You must install libmirage, vhba, cdemud, and of course cdemu the client.

When everything is installed right, as root - 'modprobe vhba' and run 'cdemud -d' - cdemud needs vhba. Then the cdemu client should work.

danellisuk · 11-28-2007, 03:16 PM

Hi Q and thanks for the quick response.

Yes, but i was using files from the experimental folder.

So I have now tried the vhba version. I tried the latest which is 2007-08-23.

I built all the components successfully in the following order (and performed 'sudo make install' on each).

libmirage-1.0.0
vhba-module
cdemu-daemon-1.0.0
cdemu-client-1.0.0
gcdemu-1.0.0

I got the vhba module to load by running:

Code:

sudo insmod vhba.ko

And now the module shows as loaded:

Code:

$ lsmod | grep vhba
vhba                   11904  0 
scsi_mod              147084  6 vhba,sbp2,sg,sd_mod,usb_storage,libata

So I think things are going well so far. But I still cant start cdemud:

Code:

$ sudo cdemud 
Starting daemon locally; num_devices: 1; ctl_device: /dev/vhba_ctl; audio_backend: (null); audio_device: (null)
cdemud: cdemud_daemon_initialize: failed to get name on system bus!
Daemon initialization failed: Name request on D-BUS failed.

I also tried running 'cdemud -d' as root like you suggested, but I don't think it is starting because 'ps -A | grep cdemu' doesnt return anything.

Code:

$ sudo cdemud -d
Daemon returned 0.

danellisuk · 11-30-2007, 02:37 PM

The problem was that I didn't read the documentation. Wow, it is much easier once that is found. If any one else is having trouble try the README file in the cdemu-daemon-1.0.0 folder!

In there it states that you must run configure with the following arguments:

Code:

$./configure --sysconfdir=/etc

That is what was causing the 'Name request on D-BUS failed' message.

The other thing was that in order for 'modprobe vhba' to work, I first had to run:

Code:

$sudo depmod -a

(which was also noted in the README file.)