Hey, On Wed, Sep 09, 2015 at 02:00:46PM +0800, 骆宏震 wrote: > Dear > Sorry to trouble you . I'd like to learn spice source code very much . I have installed spice client in my operation system(Win7 32bit) ,and built environment of server completely in linux System. The virt-viewer.exe(2.0) was installed in my client so that i can connect virtual machine. > Basic operation is well ,but I encountered a problem that USB redirection problem, when I inserted USB in my PC ,the Virtual Machine will pop up message box "USB redirection error: Could not open usb device :operation not supported or unimplemented on this platform[-12]". > The usbclerk service has been worked in my system .Also i got the usbclerk.log i found the "install_winusb_driver::Device 0951:1642 driver install failed -- Cancelled by user (-14) ".I am not sure the root reason . So i want to check the spice log information . But I didn't find it between my PC and linux OS. > I read the User manual and found below information . > 7 Logging and debugging > Spice server logs to stdout > Spice client log is /tmp/spicec.log in Linux. In Windows, it is %temp%\spicec.log. > > Unfortunately I didn't find the log trace in that path. > So could you tell me how to get the spice log ? if this e-mail can be received lucky by you, please tell me the detail procedures or help me to make a direction about this . Thank you very much . Most likely reason for your issue is that virt-viewer/spice-gtk for Windows are not built with USB redirection support. I'd recommend trying with a linux client first to make sure everything is working correctly host-side. As for getting the logs, you can start the client manually with G_MESSAGES_DEBUG set to 'all' in your environment, and with the --spice-debug argument, this should give you debug output. For server logs, it depends how you start QEMU. If you start it manually from a shell prompt, the logs will go to stdout. If you use libvirt, they will be in /var/log/libvirt/qemu/log/ Christophe
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