https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=252712
Bug ID: 252712
Summary: Webcam does not work when attached to xhci(4) but does
attached to ehci(4)
Product: Base System
Version: CURRENT
Hardware: Any
OS: Any
Status: New
Severity: Affects Only Me
Priority: ---
Component: usb
Assignee: u...@freebsd.org
Reporter: nwhiteh...@freebsd.org
I have a Logitech C925e webcam. When attached to the onboard xhci(4) controller
(AMD 300 Series USB 3.0 controller), it does not provide any picture through
webcamd, though does turn on. Data are clearly transferred, as the interrupt
rate goes up dramatically when running pwcview. If I set uvc_driver.nodrop=1 in
webcamd, I can see a small top portion of each frame, which gets smaller at
higher resolution, suggesting that the transfers are being truncated after some
number of bytes.
If I install an ehci(4)-based PCI card and plug the webcam into that instead,
everything works perfectly without tweaks.
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