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[Qemu-devel] [Bug 924943] Re: usb-host devices given by command line are
From: |
Erik Rull |
Subject: |
[Qemu-devel] [Bug 924943] Re: usb-host devices given by command line are routed incomplete to the guest |
Date: |
Fri, 03 Feb 2012 10:02:57 -0000 |
update:
Seems to affect only USB 2.0 devices and if USB 2.0 (EHCI) is enabled.
If there is only -usb -device usb-host added, it works for both USB 2.0 and USB
1.1 but extremely slow due to the missing USB 2.0 layer
If the command line is given as reported above, it works for USB 1.1 devices,
too! USB 2.0 devices show the problems as reported.
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https://bugs.launchpad.net/bugs/924943
Title:
usb-host devices given by command line are routed incomplete to the
guest
Status in QEMU:
New
Bug description:
affected qemus: qemu-1.0, qemu-kvm-1.0, qemu and qemu-kvm master branches
(older versions not tested)
affected guests: linux, windows
test hardware: standard usb key (or any other piece of USB hardware) that
works perfectly when plugged in after guest bootup
Several Sequences have been tested:
- start qemu with -readconfig /etc/ich9-ehci-uhci.cfg -device usb-tablet
-device usb-host,bus=ehci.0
- start qemu with -readconfig /etc/ich9-ehci-uhci.cfg -device usb-tablet -S
(to not start up the guest directly) + at the console prompt: "device_add
usb-host" then "c" to start the guest.
For the linux guest, I get a usb device listed and detected as /dev/sdb when
plugging it in at runtime. At startup linux does NOT detect it.
For the windows guest, I get a usb device listed and detected as "removable
media" when plugging it in at runtime. At startup Windows does detect
"something" that is listed in the device manager as Generic Mass Storage
device, but with a yellow exclamation mark and there is no removable media
listed in Explorer
If you need further testings, just let me know.
To manage notifications about this bug go to:
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