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Description of problem: when starting guest with two serial options, it works well. However, when starting guest with more than two serial options, guest fails with error:isa irq 4 already assigned. Also, man qemu-kvm says "this option can be used several times to simulate up to 4 serial ports." Version-Release number of selected component (if applicable): # uname -r 2.6.32-220.el6.x86_64 # rpm -qa| grep qemu-kvm qemu-kvm-0.12.1.2-2.213.el6.x86_64 How reproducible: 100% Steps to Reproduce: 1.boot a guest with two serial options /usr/libexec/qemu-kvm -serial stdio -serial unix:/tmp/example,server,nowait 2.two serials work well 3.boot a guest with more than two serial options /usr/libexec/qemu-kvm -serial stdio -serial unix:/tmp/example1,server,nowait -serial unix:/tmp/example2,server,nowait 4.guest fails with error:isa irq 4 already assigned Expected results: qemu-kvm should support 4 serial devices. Additional info:
Created attachment 597855 [details] Patch from Gerd Hoffmann
Verified with qemu-kvm-rhev-0.12.1.2-2.331.el6.x86_64: [root@localhost nfs]# /usr/libexec/qemu-kvm -serial stdio -serial unix:/tmp/example1,server,nowait -serial unix:/tmp/example2,server,nowait VNC server running on `::1:5900'
Since the problem described in this bug report should be resolved in a recent advisory, it has been closed with a resolution of ERRATA. For information on the advisory, and where to find the updated files, follow the link below. If the solution does not work for you, open a new bug report. http://rhn.redhat.com/errata/RHBA-2013-0527.html