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.
HP Z420 Workstation Xeon E5-2690 v2 3ghz 10-Cores 64gb 512gb SSD 4TB Win10
$239.99
HP Z440 Workstation 18 core Xeon E5-2699 V3 64GB 1TB SSD R5-340X WIFI WINDOWS 11
$189.99
Lenovo Thinkstation P510 E5-1620 V4 16GB RAM 512GB SSD DVD Quadro M2000 W10 Pro
$164.95
Intel Xeon E3-1285 V3 3.6 GHz 8M Quad-Core SR14W CPU Processor
$49.50
SR1XP Intel Xeon E5-2680 v3 12 Core 30MB 2.5GHz LGA 2011-3 Grade A Processor
$3.97
Intel Xeon E3-1270 V5 3.60GHz Quad-Core 8MB LGA 1151 CPU SR2LF
$19.99
Intel Xeon Gold 6140 SR3AX 2.3GHz 18-Core Processor CPU
$35.19
Xeon E5-2699v4 CPU, SR2JS, have 16 total
$140.00
Dell Precision T5820 Workstation W-2145 3.7GHz 64GB RAM P1000 Video 256GB SSD
$399.95
Dell Precision T7820 Tower 2x Intel Xeon Gold 6130No RAM/ GPU/ HDD/ OS
$494.97