Opened 2 years ago
Last modified 2 years ago
#21118 new defect
USB isochronous transfers cause problems under OS/2 guest
| Reported by: | lerdmann | Owned by: | |
|---|---|---|---|
| Component: | USB | Version: | VirtualBox 6.1.38 |
| Keywords: | Cc: | ||
| Guest type: | other | Host type: | Windows |
Description ¶
Host: Windows 11, guest: OS/2
If I try to play sounds via a USB connected audio 1.0 or audio 2.0 sound device, the sound always is extremely choppy. This directly relates to ticket #18947, but this time I selected "USB" as the component instead of "Audio" because this clearly is a USB issue with isochronous transfers. If needed, I could provide tracing information from the guest USB audio driver or I could provide additional analysis if requested (thinking about the "samples per microframe" value that the USB audio 2.0 device reports back on its "sync isochronous in" endpoint).
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I am saying "isochronous transfers" because the same problem holds true with video when a USB connected webcam (using isochronous and not bulk transfers) is in use.