I'm using lenovo Ideapad S540
there is 2 kind of problem
-using 'try ubuntu without install" option
when I getting into drive allocation page, there is nothing but blank, and soon system freezes.
-using 'install ubuntu' option
I get error message like this
mmc0: Unknown controller version(3). You May experience problem
usb usbx-portx: Cannot enable. Maybe the USB cable is bad
usb usbx-portx: Unable to enumerate USB device
(initramfs) Unable to find a medium containing a live file system
I checked my bootable usb stick and it worked fine on other computer.