Hello
I just got a Toshiba Satellite C655-S5056 and am having similar problems. I was also having problems with booting cds. One trick I found with tat problem is when I power up with the cd in the drive I enter the bios and move across to exit and do an exit saving changes and when it restarts the cd boots. If I don't do this the cd doesn't boot.
I also have to shut off acpi as if I don't the usb doesn't work. If you do the way mentioned above by editing the grub config, you should run "sudo update-grub" as the changes will not go into the boot file unless you do.
This whole thing has been frustrating to me as this is a nice laptop and I want to run Ubuntu in a normal fashion, also I hate to see ******* working better than Linux.
Good luck, hope I was able to help a bit.
Bob
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