My desktop has these specs:
Motherboard: Biostar A780L3C
AMD Sempron 145
2 GB RAM
160 GB HDD -- IDE Hard disk.
First I partitioned my disk with GParted into three partitions NTFS, NTFS and Ext2. Then I installed windows 7, then windows 8. Till this stage installation was ok and both OSes are running well. Then I tried to install Ubuntu 12.10. But it failed midway by displaying message that
"Bug: Unable to handle kernel null pointer dereference at 00000004
and system hangs. I cant do anything but to restart the system.
How can I fix this and load Ubuntu 12.10 and tri-boot my system?