The automatic hub is now off for a new machine type. Signed-off-by: Jamin Lin <[email protected]> --- docs/system/devices/usb.rst | 7 +++++-- 1 file changed, 5 insertions(+), 2 deletions(-)
diff --git a/docs/system/devices/usb.rst b/docs/system/devices/usb.rst index dc694d23c2..24e8ccf96e 100644 --- a/docs/system/devices/usb.rst +++ b/docs/system/devices/usb.rst @@ -3,8 +3,11 @@ USB emulation QEMU can emulate a PCI UHCI, OHCI, EHCI or XHCI USB controller. You can plug virtual USB devices or real host USB devices (only works with -certain host operating systems). QEMU will automatically create and -connect virtual USB hubs as necessary to connect multiple USB devices. +certain host operating systems). + +A machine type older than 11.2 plugs a virtual USB hub into the last +free port, so that more devices fit. A newer one does not, and a +device that finds no free port fails. USB controllers ~~~~~~~~~~~~~~~ -- 2.43.0
