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.
Grandstream GS-HT802 2 Port Analog Telephone Adapter VoIP Phone & Device, Black
$32.00
Cisco CP-8851-K9 8851 VoIP IP POE Phone Free Express Shipping 1-Year Warranty.
$40.22
Grandstream GS-HT802 2 Port Analog Telephone Adapter VoIP Phone & Device, Black
$29.99
LOT OF 6 Grandstream GXP2135 8 Lines Bluetooth Enterprise VoIP Phone DRFF-7
$125.99
Polycom VVX 301 6-line Desktop VOIP IP Phone 2200-48300-019 *NEW*
$24.99
Cisco/Linksys SPA2102 VoIP Phone Adapter Router 2FXS (Unlocked)
$16.99
Cisco CP-7945G VOIP Phone With Stand & Handset Business IP Phone 7945
$3.00
New Cisco 7945G IP VoIP Gigabit GIGE Telephone Phone CP-7945G -
$24.95
Lot Of 7 Cisco CP-7945G VOIP Phone With Stand & Handset Business IP Phone 7945
$41.99
Yealink SIP-T41P PoE Ultra Elegant VoIP Phone
$29.95