live usb - Disk errors while trying to boot LiveUSB on laptop

I made an Ubuntu 15.04 LiveUSB and now am trying to boot it to install on a SSD. While trying to boot from it the following errors happen:

[    7.027548] ACPI PCC probe failed.
starting version 219
error opening USB device 'descriptors' file
[    9.867586] sd 4:0:0:0: [sdb] No Caching mode page found
[    9.867609] sd 4:0:0:0: [sdb] Assuming drive cache: write through

[  360.016989] INFO: task kworker/u16:2:59 blocked for more than 120 seconds.
[  360.017064]       Not tainted 3.19.0-15-generic #15-Ubuntu
[  360.017080] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
[  360.017153] INFO: task systemd-udevd:126 blocked for more than 120 seconds.
[  360.017173]       Not tainted 3.19.0-15-generic #15-Ubuntu
[  360.017188] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
[  360.017254] INFO: task systemd-udevd:127 blocked for more than 120 seconds.
[  360.017273]       Not tainted 3.19.0-15-generic #15-Ubuntu
[  360.017289] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
[  360.017365] INFO: task systemd-udevd:128 blocked for more than 120 seconds.

[  360.017384]       Not tainted 3.19.0-15-generic #15-Ubuntu
[  360.017399] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
worker [130] /devices/pci0000:00/0000:00:1f.2/ata1/host0/target0:0:0:0/block/sda is taking a long time
worker [133] /devices/pci0000:00/0000:00:1f.2/ata1/host0/target0:0:1/0:0:1:0/block/sr0 is taking a long time
timeout 'ata_id --export /dev/sda'
slow: 'ata_id --export /dev/sda' [143]
worker [130] /devices/pci0000:00/0000:00:1f.2/ata1/host0/target0:0:0:0/block/sda timeout; kill it
seq 1188 '/devices/pci0000:00/0000:00:1f.2/ata1/host0/target0:0:0:0/block/sda' killed
worker [133] /devices/pci0000:00/0000:00:1f.2/ata1/host0/target0:0:1/0:0:1:0/block/sr0 timeout; kill it
seq 1198 '/devices/pci0000:00/0000:00:1f.2/ata1/host0/target0:0:1/0:0:1:0/block/sr0' killed

worker [130] terminated by signal 9 (Killed)
worker [126] /devices/pci0000:00/0000:00:1f.2/ata1/host0/target0:0:0:0/block/sda/sda1 is taking a long time
worker [127] /devices/pci0000:00/0000:00:1f.2/ata1/host0/target0:0:0:0/block/sda/sda2 is taking a long time
worker [128] /devices/pci0000:00/0000:00:1f.2/ata1/host0/target0:0:0:0/block/sda/sda3 is taking a long time
worker [126] /devices/pci0000:00/0000:00:1f.2/ata1/host0/target0:0:0:0/block/sda/sda1 timeout; kill it
seq 1189 '/devices/pci0000:00/0000:00:1f.2/ata1/host0/target0:0:0:0/block/sda' killed
worker [127] /devices/pci0000:00/0000:00:1f.2/ata1/host0/target0:0:0:0/block/sda/sda2 timeout; kill it
seq 1190 '/devices/pci0000:00/0000:00:1f.2/ata1/host0/target0:0:1/0:0:1:0/block/sr0' killed
worker [128] /devices/pci0000:00/0000:00:1f.2/ata1/host0/target0:0:0:0/block/sda/sda3 timeout; kill it
seq 1191 '/devices/pci0000:00/0000:00:1f.2/ata1/host0/target0:0:0:0/block/sda/sda3' killed

A couple of hours staring in front of the screen, I just shutdown the machine because there is nothing I can do.

FYI, the worker lines sometimes doesn't appear, so the INFO statements display the actual error.

Some concerns:

• The USB was built using Startup Disk Creator from Ubuntu 14.10



• The ISO is not corrupt according to sha256sum


• Yeah, I wrote down 'da whole text manually


• Couldn't find any real dupe, this (and child posts too) doesn't contain any solution. Even I tried adding nomodeset to the grunt file but no luck at all


• The USB stick is 2.0, but I tried with both ports 2.0 and 3.0


• Just tried the USB stick on another computer and is working fine

Looks like this post has some interesting stuff. Braiam said that there could be an electrical issue related. In fact, I turn off the machine, wait 'till the next day, unplug the electrical power and it's working! Damn electrical power..