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.
1U IBM x3550 M5 4 Bay SFF SAS3 Server 2x E5-2683 V3 28 Core 128GB DDR4 2x Tray
$318.00
IBM Power S822 8284-22A 12SFF Power8 3.89GHz 6Core 64GB RAM No HDD Server System
$359.99
IBM Power S822 12-Bay Server System Power8 Core 3.42Ghz DVD-Rom Drive 64GB No HD
$349.99
IBM Power S822 8284-22A 12SFF Power8 3.89GHz 6-Core 64GB RAM No Bezel/HDD Server
$319.99
VINTAGE IBM PC SERVER MODEL 320 8640 J
$325.00
IBM mainframe server cpu IBM93 vintage cpu collector's item
$129.99
IBM System x3250 M4 Server Intel Xeon E3-1220 3.10GHz 8GB RAM No HDDs
$60.56
IBM Server eServer | IBMR1000 | UPS 1000VA 700W W/New Batteries
$115.00
IBM X3650 M5 8871-AC1, 2 X E5-2620V4 2.1 GHZ,20M, 32 GB, DUAL 750W, 2 X 1TB HDD
$369.99
IBM System X3250 M3 Server 8GB RAM Intel Xeon x3440 2.53ghz (NO HDD)
$41.99