Bug 728167
Summary: | usb-hub doesn't work under EHCI adapter | ||
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Product: | Red Hat Enterprise Linux 6 | Reporter: | juzhang <juzhang> |
Component: | qemu-kvm | Assignee: | Gerd Hoffmann <kraxel> |
Status: | CLOSED NOTABUG | QA Contact: | Virtualization Bugs <virt-bugs> |
Severity: | medium | Docs Contact: | |
Priority: | medium | ||
Version: | 6.2 | CC: | michen, mkenneth, qzhou, shuang, tburke, virt-maint |
Target Milestone: | rc | ||
Target Release: | --- | ||
Hardware: | Unspecified | ||
OS: | Unspecified | ||
Whiteboard: | |||
Fixed In Version: | Doc Type: | Bug Fix | |
Doc Text: | Story Points: | --- | |
Clone Of: | Environment: | ||
Last Closed: | 2011-08-12 09:15:27 UTC | Type: | --- |
Regression: | --- | Mount Type: | --- |
Documentation: | --- | CRM: | |
Verified Versions: | Category: | --- | |
oVirt Team: | --- | RHEL 7.3 requirements from Atomic Host: | |
Cloudforms Team: | --- | Target Upstream Version: | |
Embargoed: |
Description
juzhang
2011-08-04 09:10:02 UTC
The USB Hub emulated by qemu is a USB 1.1 Hub and thus doesn't work on EHCI by design. You can hook it up nevertheless by using a companion controller setup (see bug 728120 for how to do that). Adding USB 2.0 support to the hub is possible. It is a non-trivial effort though and involves a bunch of changes in both usb-ehci and usb-hub to implement split-transfers. Very unlikely to happen for RHEL-6, you might want to file a RFE bug for RHEL-7 though. |