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View Full Version : [SOLVED] Error: Prefix Not Set - unable to install ubuntu 12.04 64bit



grkrishna1984
July 30th, 2012, 07:07 PM
I am using Ubuntu 12.04 LTS 32 bit .. later I came to know that My Lappy has 64 bit processor ... so I downloaded Ubuntu 12.04 LTS 64 bit and wrote that image to DVD ... and tried to ( as i want to try dual boot ) ... when selected boot from DVD its giving " Error: Prefix not set " and a wierd screen ... then i had to reboot forcibly ... tried 4 times but couldnt install ... i checked the md5 and its matching ... Please help me how to install ubuntu 12.04 LTS 64bit .... I am able to install that in Virtual Matchine and its working fine ... please guide me how to install ...

i even tried with downloading cdimage from cdimage.ubuntu.com precise alternate image and burn it to dvd ... and tried to install ... but same problem ... error prefix not found... then a wierd screen appears ... please please help me what to do ... how can i install 64bit ubuntu on my laptop

My Laptop Configuration is. ... i3 2nd gen, 4gb ram, 500gb hard disk, intel hd3000 graphics, lenovo b570e ....

grkrishna1984
August 1st, 2012, 05:30 AM
Its all wrong with a cyclic folder " ubuntu " which is shortcut created in the ISO ... because of that i couldnt install ubuntu 12.04 LTS 64 bit ... I have downloaded ISO master from software centre and deleted that that ubuntu folder and saved that iso in other location and burned it to DVD ... thats it ... Its all worked fine .. .now i am using it without any problem ...

If you have the same problem .. then install iso master in ubuntu and edit the iso file ...

Enjoy

Ramakrishna G