Public bug reported:
Under libvirt you can specify special dedicated serial channels that
link the Host to the Guest OS.
e.g.
<channel type='dev'>
<source path='/dev/urandom'/>
<target type='virtio'/>
</channel>
On a Redhat derivative distribution this would show up in /dev as
/dev/vport0p1 (with an associated link name if one was specified).
On Ubuntu they don't appear at all.
lspci does show that the controller exists:
00:07.0 Communication controller: Red Hat, Inc Virtio console
And the kernel appears to enumerate the device.
But no devices are created in the filesystem on Ubuntu.
ProblemType: Bug
DistroRelease: Ubuntu 12.10
Package: udev 175-0ubuntu10
ProcVersionSignature: Ubuntu 3.5.0-14.15-generic 3.5.3
Uname: Linux 3.5.0-14-generic x86_64
ApportVersion: 2.5.1-0ubuntu7
Architecture: amd64
CurrentDmesg:
Date: Tue Sep 11 07:17:57 2012
Lsusb:
Bus 001 Device 002: ID 0627:0001 Adomax Technology Co., Ltd
Bus 001 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
MachineType: Red Hat KVM
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.5.0-14-generic
root=UUID=4326d9c2-b06d-4e3d-8103-d1d2e60f2286 ro quiet
SourcePackage: udev
UpgradeStatus: No upgrade log present (probably fresh install)
dmi.bios.date: 01/01/2007
dmi.bios.vendor: Seabios
dmi.bios.version: 0.5.1
dmi.chassis.type: 1
dmi.chassis.vendor: Red Hat
dmi.modalias:
dmi:bvnSeabios:bvr0.5.1:bd01/01/2007:svnRedHat:pnKVM:pvrRHEL6.2.0PC:cvnRedHat:ct1:cvr:
dmi.product.name: KVM
dmi.product.version: RHEL 6.2.0 PC
dmi.sys.vendor: Red Hat
** Affects: udev (Ubuntu)
Importance: Undecided
Status: New
** Tags: amd64 apport-bug quantal uec-images
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https://bugs.launchpad.net/bugs/1048973
Title:
udev does not export virtioserial ports in /dev
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