Category:ATSC USB Devices

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

Latest revision as of 10:03, 3 December 2012


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.

/:  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

OK

You can solve the above situation by adding a PCI-Express to USB3.0 card:

/:  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

Rule: One device per bus

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