I have recently upgraded to virtualbox 6.0 (Arch Linux Host). I have Windows 7 and 10 guests. All of them have xHCI enabled.
I usually give the guests access to an FT232R based RS232 adapter. The guests detects the USB device just fine, installs the COM port driver, and it seems to work. But since the upgrade to 6.0, the performance seems to have degraded. The application sends some request via the COM port and expects a response within a certain time.
Since the upgrade, the application frequently reports timeout errors. This did not happen with 5.2.22.
If I disable USB 3.0, the guest has an OHCI and an EHCI USB controller. THe FT232R is actually attached to the OHCI controller, but things work again. No more timeout errors.
Performance problems with USB 3.0 controller
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socratis
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Re: Performance problems with USB 3.0 controller
Does it continue to work properly if you once again downgrade to 5.2.22?skoehler wrote:This did not happen with 5.2.22.
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Re: Performance problems with USB 3.0 controller
I will check. Didn't have time to do that yet.
Last edited by socratis on 12. Jan 2019, 03:45, edited 1 time in total.
Reason: Removed unnecessary verbatim quote of the whole previous message.
Reason: Removed unnecessary verbatim quote of the whole previous message.