View Full Version : [SOLVED] how to usb boot kubuntu on dell 3521?

March 6th, 2016, 02:38 PM
I have install ubuntu 14.10 alongside windows 7, in BIOS i set legacy boot on usb, hdd is below, save changens and exit.
In usb is live kubuntu. will not boot from usb, but normally starts out we grub?? How to fix, and start kubuntu live?

March 6th, 2016, 10:47 PM
If live installer starts with grub that is UEFI boot.
Is Windows installed in UEFI or BIOS boot mode? You want Kubuntu in same boot mode.

Post this:
sudo parted -l
sudo fdisk -lu

March 6th, 2016, 11:03 PM
sudo parted -l,

Model: ATA TOSHIBA MQ01ABF0 (scsi)
Disk /dev/sda: 500GB
Sector size (logical/physical): 512B/4096B
Partition Table: msdos
Disk Flags:

Number Start End Size Type File system Flags
1 1049kB 106MB 105MB primary ntfs boot
2 106MB 85,9GB 85,8GB primary ntfs
3 85,9GB 479GB 393GB primary ntfs
4 479GB 500GB 21,0GB extended
5 479GB 496GB 16,8GB logical ext4
6 496GB 500GB 4174MB logical linux-swap(v1)

for sudo fdisk -lu

Disk /dev/sda: 465,8 GiB, 500107862016 bytes, 976773168 sectors
Units: sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 4096 bytes
I/O size (minimum/optimal): 4096 bytes / 4096 bytes
Disklabel type: dos
Disk identifier: 0x552cf058

Device Boot Start End Sectors Size Id Type
/dev/sda1 * 2048 206847 204800 100M 7 HPFS/NTFS/exFAT
/dev/sda2 206848 167774207 167567360 79,9G 7 HPFS/NTFS/exFAT
/dev/sda3 167774208 935811071 768036864 366,2G 7 HPFS/NTFS/exFAT
/dev/sda4 935813118 976771071 40957954 19,5G 5 Extended
/dev/sda5 935813120 968615935 32802816 15,7G 83 Linux
/dev/sda6 968617984 976771071 8153088 3,9G 82 Linux swap / Solaris

Partition 5 does not start on physical sector boundary.

March 7th, 2016, 01:27 AM
You have MBR(dos) partitioning so Windows must be in BIOS boot mode.
You already have Linux partitions, it that from an install?

Or is grub you are now seeing from the install, not the flash drive installer?

March 7th, 2016, 03:08 PM
Yes, it is from install, installed Ubuntu 14.10 and Windows 7, but I want to try kubuntu with usb. but I can not figure out how the BIOS that boots from USB. I choose usb come in first to rise on my system in bios , but it boot normally like nothing that I have not changed in the BIOS ??

March 7th, 2016, 03:14 PM
If flash drive does not boot from BIOS, then it is usually that it is not correctly configured.
Also some brands of flash drives just do not work, or the combination of live installer & flash drive. Not sure why but many have reported unexplained issues. And using different installer then worked.

What installer did you use and what flash drive?
Also link on how to create a bootable DVD or USB flash drive, Windows or Ubuntu

March 7th, 2016, 10:52 PM
I use unetbootin installer and flash is cruzer slice 8gb.

March 7th, 2016, 11:39 PM
Yes installer was a problem,
I replaced the installer is ok now, its working, Thank yo​u very much.!!!