[mythtv-users] AVerMedia AVerTV DVB-T Volar USB not initialised on startup

Greg Ahpee greg at ahpee.org
Thu Feb 14 08:59:48 UTC 2008


Greg Ahpee wrote:
> I have a similar problem with a Tiny-USB running on Debian which works 
> most of the time but sometimes fails to initialize at startup. After 
> much searching I found mention that problems may be experienced if the 
> usb kernel module ohci_hcd loads before ehci_hcd. Checking my kernel 
> logs indicates that this is indeed the case for me. All is ok if 
> ehci_hcd loads first otherwise it fails. It has been suggested that 
> blacklisting ohci_hcd may get around the problem but may (will?) result 
> in  no high speed usb capability. I have not tried this solution nor 
> have I found any way to control the module loading order.
>
>
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>   
Further research indicates that ohci_hcd provides low speed (USB1.0) and 
not high speed as I wrote above. I tried blacklisting it on my system 
and it still loaded anyway and, to make matters worse, it loaded before 
ehci_hcd.  I also played around with /etc/modules to see if I could 
influence the order that the modules are loaded and seemed to be able to 
get ehci_hcd to load first by including an entry for it in this file. 
Encouraged by this I connected the usb tuner and rebooted only to find 
the ohci_hcd loaded first and the tuner worked anyway!  I give up.


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