Difference between revisions of "Category:DVB-C USB Devices"

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(Replaced content with "Category:DVB-C See: DVB via USB")
 
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[[Category:DVB-C]]
 
[[Category:DVB-C]]
   
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See: [[DVB via USB]]
== lsusb -t ==
 
 
=== Wrong ===
 
With this setup you will have bandwidth problems with no appropriate warning whatsoever on any log file. Except that video will look horrible.
 
<pre>
 
/: Bus 02.Port 1: Dev 1, Class=root_hub, Driver=ohci_hcd/8p, 12M <-- USB1.1, slow, don't us
 
/: Bus 01.Port 1: Dev 1, Class=root_hub, Driver=ehci_hcd/8p, 480M <-- one bus
 
|__ Port 2: Dev 2, If 0, Class=vend., Driver=dvb_usb_ttusb2, 480M <-- 1st DVB device, shares bandwidth
 
|__ Port 4: Dev 2, If 0, Class=vend., Driver=dvb_usb_ttusb2, 480M <-- 2nd DVB device, shares bandwidth
 
</pre>
 
 
=== OK ===
 
You can solve the above situation by adding a PCI-Express to USB3.0 card:
 
<pre>
 
/: Bus 04.Port 1: Dev 1, Class=root_hub, Driver=xhci_hcd/2p, 5000M
 
/: Bus 03.Port 1: Dev 1, Class=root_hub, Driver=xhci_hcd/2p, 480M <-- one bus
 
|__ Port 2: Dev 2, If 0, Class=vend., Driver=dvb_usb_ttusb2, 480M <-- one DVB device
 
/: Bus 02.Port 1: Dev 1, Class=root_hub, Driver=ohci_hcd/8p, 12M <-- USB1.1, slow, don't use
 
/: Bus 01.Port 1: Dev 1, Class=root_hub, Driver=ehci_hcd/8p, 480M <-- one bus
 
|__ Port 4: Dev 2, If 0, Class=vend., Driver=dvb_usb_ttusb2, 480M <-- one DVB device
 
</pre>
 
 
'''''Rule''': One device per bus''
 

Latest revision as of 10:11, 3 December 2012