[linux-dvb] Re: No /dev/dvb entries with WinTV NEXUS-S under Kernel 2.6.6

[Jean-Michel POURE <jm@poure.com>]

Dear Steve and all,

> I don't think I've ever seen hotplug do that, or even kudzu for that
> matter. I can image kudzu creating /dev entries, - but removing them?
> That's a little dangerious. Maybe someone else can confirm.

Hotplug does manage /dev entries automatically, at least under Debian SID.

For example, if the USB cable of my cam is unplugged:
ls -l
crw-rw----    1 root     video     81,   0 2004-06-03 10:13 video0

Now, if the USB cam is plugged-in:
ls -l
crw-rw----    1 root     video     81,   0 2004-06-03 10:13 video0
crw-rw----    1 root     video     81,   1 2004-06-03 12:01 video1

Hotplug removes and adds devices automatically in /dev

I was wondering if hotplug was not waiting for plugging-in the sattelite dish 
(I can't do it right now).

> Maybe you can pinpoint the service that's causing the problem. Assuming one
> of the startup services is deleting you dvb files, I would start by booting
> the kernel in single user mode "kernel 1" or "kernel single", then calling
> init 1, init 2 etc until you notice that the files have disappeared. You
> should be able to determine which run level causes the problem, and which
> services are started in that run level.

This may be a problem of firmware loaded by hotplug.

From my previous logs:
Jun  2 15:50:08 station kernel: saa7146: found saa7146 @ mem dca96000 
(revision 1, irq 18) (0x13c2,0x0003).
Jun  2 15:50:08 station kernel: DVB: registering new adapter 
(Technotrend/Hauppauge PCI rev2.1).
Jun  2 15:50:08 station kernel: Technotrend/Hauppauge PCI rev2.1 adapter 0 has 
MAC addr = 00:d0:5c:20:ef:26
Jun  2 15:50:08 station kernel: gpioirq unknown type=0 len=0
Jun  2 15:50:08 station kernel: DVB: AV7111(0) - firm f0240009, rtsl b0250018, 
vid 71010068, app 8000261b
Jun  2 15:50:08 station kernel: DVB: AV7111(0) - firmware supports CI link 
layer interface
Jun  2 15:50:08 station kernel: av7110(0): Crystal audio DAC detected
Jun  2 15:50:08 station kernel: videodev: "av7110" has no release callback. 
Please fix your driver for proper sysfs support, see 
http://lwn.net/Articles/36850/
Jun  2 15:50:08 station kernel: saa7146_vv: saa7146 (0): registered device 
video0 [v4l2]
Jun  2 15:50:08 station kernel: av7110: found av7110-0.

What does "av7110 has no release callback" mean?

For information, the md5sum is:

md5sum /usr/lib/hotplug/firmware/dvb-ttpci-01.fw
b8cba3504373852141759176fb6ab5b0  /usr/lib/hotplug/firmware/dvb-ttpci-01.fw

Best regards,
Jean-Michel