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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.

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  • Did you 'check install media' first? ie. verify you had a perfect download of the ISO & write to your install media (help.ubuntu.com/community/Installation/CDIntegrityCheck) It would be my first step. (The image will be different to my link, but the check CD for defects option will be detectable). On some boxes you need to press a key (when you see keyboard-in-box & person-in-circle to make the menu appear, others machines it appears regardless.
    – guiverc
    Jul 31, 2019 at 4:02

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Problem solved. It was SATA control mode issue. I changed it from RST to ACHI and everything is OK.

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