I wanted to start an ubuntu virtual machine as follows in Knoppix 7.2.0DVD (booted with 'fromhd'):
root# qemu-system-x86_64 -cdrom ubuntu-12.04.3-dvd-amd64.iso
The iso image was read OK, with the ubuntu boot screen appearing in the vga display of the emulator. However the booting failed with the following message:
[ 29.044201] BUG: soft lockup - CPU#0 stuck for 23s! [swapper/0:1]
[ 53.044186] BUG: soft lockup - CPU#0 stuck for 22s! [swapper/0:1]
[ 89.044214] BUG: soft lockup - CPU#0 stuck for 23s! [swapper/0:1]
When the iso image is burned to a DVD, the ubuntu system boots up without a problem from the disk. And "qemu-system-x86_64" starts a Knoppix VM from iso without problems. So it appears that the ubuntu iso and the qemu behaves as expected individually.
Although this problem may reside well outside the domain of Knoppix per se, I hope I may receive advice on where to go from here. Thanks in advance for any help.
Cisco Catalyst C9300-24UX-A 24 Port 10G/mGig UPOE Network Switch, no module
$299.97
Fortinet FortiSwitch FS-124D-POE 24 Port Gigabit Ethernet Switch UNREGISTERED
$99.97
ARUBA J9772A 2530-48G PoE+ 48 PORT ETHERNET SWITCH W/ RACK EARS J9772-60301
$125.69
HP JG937A Flexnetwork 5130-48G PoE+ 48-Port Gigabit Network Switch
$59.99
NETGEAR GS305300PAS 5 Port Gigabit Ethernet Unmanaged Switch
$15.99
New Linksys SE3005 5-port Gigabit Ethernet Switch
$18.99
Cisco SG300-10P 10x PoE RJ45 Gigabit Switch SRW2008P-K9 V03 + Power Adapter
$34.99
Linksys SE3008 8 Ports Rack Mountable Gigabit Ethernet Switch
$21.99
Dell X1018 X-Series Smart Managed Switches 16-Port Gigabit 2-Port SFP Switch
$65.00
NetGear ProSafe GS748T V4 48-Port Gigabit Smart Switch w/ Ears
$35.00