Isochronous USB Issues » History » Version 2
tnt, 01/07/2022 07:23 PM
| 1 | 1 | laforge | h1. Isochronous USB Issues |
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| 3 | It seems there are many XHCI implementations out there that have problems properly computing the isochronous bandwidth limits and hence refuse to activate both [[icE1usb]] interfaces. |
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| 5 | |_.System/Board|_.USB Controller|_.Runs with 2 icE1usb interfaces| |
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| 6 | |Raspberry Pi 3B|built-in|YES| |
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| 7 | |Raspberry Pi 4|VIA XHCI|no| |
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| 8 | |Thinkpad x260|Intel Corporation Sunrise Point-LP USB 3.0 xHCI CoStroller (rev 21)|no| |
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| 9 | |PC-Engines APU2|AMD GX-412TC SoC|external:no, internal:YES| |
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| 10 | 2 | tnt | |AMD Ryzen|Ryzen CPU|YES| |
| 11 | |AMD Ryzen|X570 chipset|YES| |
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| 13 | Note that in all cases, the device needs to be the sole full speed device on the bus since it uses all the full speed bandwidth and AFAICT all root-hubs are single-TT. |
