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I just purchased a Toshiba Qosimo X75-A7298 laptop and want to install Ubuntu on it (don't particularly care which version). I tried both V12.04LTS and 13.10. The boot process hangs almost immediately after I choose to "Try Ubuntu without installing". I turned off "secure boot" and changed the boot mode from "UEFI" to "CSM" with no luck.

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Try fixing the video problem before switching modes. For UEFI machines (with a black screen grub (grub-efi) without any function key options, like the older grub-pc, edit the grub menu and add the below options on the "linux" line, then boot with F10 or ctrl-X.

Options for Video problems:


To allow Nvidia hybrid machines to boot.

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Thanks, but this only gets me part way. I tried to boot the trial run, and it fails to start X. It boots to a command prompt, with no message as to why. Any thoughts? – sidesdj1 Dec 17 '13 at 21:43
search this site for "bumblebee". Might help your hybrid? video problem. – ubfan1 Dec 18 '13 at 1:23

I've successfully installed Ubuntu 14.04 on the Toshiba Qosmio X75-A7298. Here's where I got the iso:

Basically, I just burn the ISO called "trusty-desktop-amd64.iso" to a DVD.

I pressed F2 a few times, right after turning on the Toshiba Qosmio X75-A7298. That took me to the bios and I too disabled secure boot and changed the boot mode from "UEFI" to "CSM" in the "Advanced" section of the bios.

After saving these changes and rebooting, this time I held down the "c" key so that it would know to boot from the dvd I burned.

The only issue I'm now having is I can't figure out how to adjust the screen brightness:

Oh, and by the way. This laptop runs Ubuntu 14.04 blazingly fast.

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