** Description changed: I noticed that after an upgrade from 13.04 to 13.10 the kvm virtual machines were started no more. After having a look to /var/log/syslog I discovered the following error messages: [ 1598.121581] kvm: Unknown parameter `allow_unsafe_assigned_interrupts' [ 1609.503790] kvm: Unknown parameter `allow_unsafe_assigned_interrupts' [ 1692.341512] kvm_intel: Unknown parameter `nested' The kernel module paramerters mentioned above work no more. "modinfo" tells that the parameters should be available (as in 13.04) but they do not work. I can comment them out in the files where they are used (for example in /etc/modprobe.d/qemu-kvm.conf and in /etc/modprobe.d/qemu-system-x86.conf). "allow_unsafe_assigned_interrupts" is used in my own configuration file which is not part of any ubuntu package. After commenting out the parameters I get the following message (in /var/log/syslog): kvm_iommu_map_guest: No interrupt remapping support, disallowing device assignment. Re-enble with "allow_unsafe_assigned_interrupts=1" module option. Using the mentioned parameter gives me the error message stated at the - beginning. A consequence of commenting out the poarameters is that vga + beginning. A consequence of commenting out the parameters is that vga passthrough (with kvm) is now broken.
-- You received this bug notification because you are a member of Kernel Packages, which is subscribed to linux in Ubuntu. https://bugs.launchpad.net/bugs/1204283 Title: parameters "nested" and "allow_unsafe_assigned_interrupts" of kernel modules kvm_intel resp. kvm do not work Status in “linux” package in Ubuntu: New Bug description: I noticed that after an upgrade from 13.04 to 13.10 the kvm virtual machines were started no more. After having a look to /var/log/syslog I discovered the following error messages: [ 1598.121581] kvm: Unknown parameter `allow_unsafe_assigned_interrupts' [ 1609.503790] kvm: Unknown parameter `allow_unsafe_assigned_interrupts' [ 1692.341512] kvm_intel: Unknown parameter `nested' The kernel module paramerters mentioned above work no more. "modinfo" tells that the parameters should be available (as in 13.04) but they do not work. I can comment them out in the files where they are used (for example in /etc/modprobe.d/qemu-kvm.conf and in /etc/modprobe.d/qemu-system-x86.conf). "allow_unsafe_assigned_interrupts" is used in my own configuration file which is not part of any ubuntu package. After commenting out the parameters I get the following message (in /var/log/syslog): kvm_iommu_map_guest: No interrupt remapping support, disallowing device assignment. Re-enble with "allow_unsafe_assigned_interrupts=1" module option. Using the mentioned parameter gives me the error message stated at the beginning. A consequence of commenting out the parameters is that vga passthrough (with kvm) is now broken. To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1204283/+subscriptions -- Mailing list: https://launchpad.net/~kernel-packages Post to : kernel-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~kernel-packages More help : https://help.launchpad.net/ListHelp