[vdr] DVB device discovery at startup

Laz laz at club-burniston.co.uk
Sun Jun 25 12:00:00 CEST 2006


On Saturday 24 June 2006 21:55, Olaf Titz wrote:
> > I'm not unplugging anything: they sometimes disconnect and reconnect
> > themselves for no apparent reason. I don't think these USB devices
> > (Nova-T USB2) like working together!
>
> USB devices sometimes do this, esp. with bad cabling or slightly
> broken hubs in between. Software handling them must be prepared for
> this situation (unfortunately, most isn't...)

This is the output I see when they disconnect and LEDs go out:

Jun 25 10:42:52 vdr-tng kernel: hub 4-0:1.0: state 7 ports 6 chg 0000 evt 0006
Jun 25 10:42:52 vdr-tng kernel: ehci_hcd 0000:00:10.3: GetStatus port 1 status 
00180b POWER sig=j PEC CSC CONNECT
Jun 25 10:42:52 vdr-tng kernel: hub 4-0:1.0: port 1, status 0501, change 0003, 
480 Mb/s
Jun 25 10:42:52 vdr-tng kernel: usb 4-1: USB disconnect, address 2
Jun 25 10:42:52 vdr-tng kernel: usb 4-1: usb_disable_device nuking all URBs
Jun 25 10:42:52 vdr-tng kernel: ehci_hcd 0000:00:10.3: shutdown urb cb1b8860 
pipe c0008200 ep1out-bulk

At this point, the LEDs are out but all of the device files are still there. 
Anything that tries to access them hangs nicely...

I hate USB...PCI cards tend to just work! Unfortunately, I only have one PCI 
slot in that system and htat already has a DVB card in it!

:(

Cheers,

Laz



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