Actions
Isochronous USB Issues » History » Revision 2
« Previous |
Revision 2/20
(diff)
| Next »
tnt, 01/07/2022 07:23 PM
Isochronous USB Issues¶
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.
| System/Board | USB Controller | Runs with 2 icE1usb interfaces |
|---|---|---|
| Raspberry Pi 3B | built-in | YES |
| Raspberry Pi 4 | VIA XHCI | no |
| Thinkpad x260 | Intel Corporation Sunrise Point-LP USB 3.0 xHCI CoStroller (rev 21) | no |
| PC-Engines APU2 | AMD GX-412TC SoC | external:no, internal:YES |
| AMD Ryzen | Ryzen CPU | YES |
| AMD Ryzen | X570 chipset | YES |
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.
Updated by tnt over 2 years ago · 2 revisions
