Red Hat Bugzilla – Bug 858697
virtio_serialports are sometimes missing in Windows XP guest
Last modified: 2013-01-09 07:08:31 EST
Description of problem: Sometimes when I boot the Windows XP guest some or all of virtio_serialports are missing in \\.\ and \\Device\. Guest reboot usually helps or leads to different missing ports. Version-Release number of selected component (if applicable): Guest: Windows XP SP3 virtio-win-0.1-30 Host: Fedora 17, kernel 3.5.3-1.fc17.x86_64 qemu-kvm-1.0.1-1.fc17.x86_64 How reproducible: Very often. In over 60% cases some of the ports are missing and over 30% none of the ports is initialized. Some of the ports also disappear after the reboot. Steps to Reproduce: 1. boot Windows XP guest with virtio_serialport 2. look for \\.\$symbolic_link or \\.\\{6FDE7547-1B65-48ae-B628-80BE62016026}#VIOSerialPort#.. or \\Device\vport* device ex. using WinObj. Actual results: Some or none of virtio_ports is present. CreateFile() with expected name fails. Expected results: All of virtio_ports should have GUID, vport and symbolic names and should be prepared for use.
I used this command to run guest with 4 virtio_serialports: /usr/bin/qemu-kvm -S -name vm1 -nodefaults -chardev socket,id=hmp_id_hmp1,path=/tmp/monitor-hmp1-20120913-092500-jOJB65N Y, se rve r,nowait -mon chardev=hmp_id_hmp1,mode=readline -chardev socket,id=serial_id_20120913-092500-jOJB65NY,path=/tmp/serial-20120 913 -0 925 00-jOJB65NY,server,nowait -device isa-serial,chardev=serial_id_20120913-092500-jOJB65NY -device virtio-serial-pci,id=virtio_serial_pci0 -chardev socket,id=devvc1,path=/tmp/virtio_port-vc1-20120913-092500-jOJB65NY, se rv er, nowait -device virtconsole,chardev=devvc1,name=com.redhat.spice.0,id=vc1,bus=virtio _s er ial _pci0.0 -chardev socket,id=devvc2,path=/tmp/virtio_port-vc2-20120913-092500-jOJB65NY, se rv er, nowait -device virtconsole,chardev=devvc2,name=com.redhat.spice.1,id=vc2,bus=virtio _s er ial _pci0.0 -chardev socket,id=seabioslog_id_20120913-092500-jOJB65NY,path=/tmp/seabios-2 01 20 913 -092500-jOJB65NY,server,nowait -device isa-debugcon,chardev=seabioslog_id_20120913-092500-jOJB65NY,iobase=0 x4 02 -device ich9-usb-uhci1,id=usb1 -drive file=/tmp/kvm_autotest_root/images/winXP-32.qcow2,index=0,if=ide,cac he =n one -device virtio-net-pci,netdev=id8yGdBy,mac=9a:a4:a5:a6:a7:a8,id=idPepC47 -netdev tap,id=id8yGdBy,fd=19 -m 512 -smp 1,cores=1,threads=1,sockets=1 -cpu Penryn -drive file=/tmp/kvm_autotest_root/isos/windows/winutils.iso,media=cdrom,in de x= 1 -device usb-tablet,id=usb-tablet1,bus=usb1.0,port=1 -vnc :0 -vga std -rtc base=localtime,clock=host,driftfix=none -boot order=cdn,once=c,menu=off -enable-kvm
This problem disappeared in newer version http://download.devel.redhat.com/brewroot/packages/virtio-win-prewhql/0.1/37/win/virtio-win-prewhql-0.1.zip
I tried max_serialport and max_serials_and_conosles boot tests and it works perfectly (30 serialports in the first test and 15+15 consoles and serialports in the second test).