I recently purchased a new (2015) Toshiba Satellite S50-C, wiped Windows 10, and have been attempting to install Ubuntu for several days.
Details on the machine: Intel Core i7-6500U Processor (4M Cache, 2.50 GHz) with Intel Turbo Boost Technology 2.0 (x64-based processor) 16 GB DDR3L 1600MHz = 8GB + 8GB 1.0TB (5400rpm); Hybrid 8G Serial ATA hard disk drive 256GB M.2 Solid State Drive (SSD); 4GB DDR3 NVIDIA GeForce FTX 950M with NVIDIA Optimus Technology; 15.6" FHD TruBrite display (1920x1080)
I am attempting to install Ubuntu on the 256 GB SSD.
After failing to get 14.04 to install (usually some problem with failing to boot or freezing), I decided to go with 15.10 since my hardware is so new. I have completed a 15.10 install via thumb drive, in CSM boot mode (not UEFI), and with the Intel Turbo Boost Technology disabled. I then re-enabled the Turbo boost after install.
Now, I am unable to proceed past the login screen. It goes black, flashes a purple screen, and then returns to the login screen. Guest login also does not work.
CTRL + ALT + F1 (or F2, F3) do not work to get me into a terminal from the login screen. However if I enter the GRUB edit screen (typing 'e') in startup when GRUB is displayed, I can access a terminal by adding '3' at the end of the linux line (runlevel 3). Also, at the recommendation of add'l posts, I have added the following to the same line in GRUB:
replace 'quiet splash' with 'nomodeset'
i915.modeset=0 i915.i915_enable_rc6=1 nouveau.blacklist=1
I am not sure if any of the above is necessary.... I originally added 'nomodeset' because I was booting into a black screen. This seems to have solved that issue, but has created the login loop issue.
I have a feeling this is related to the NVIDIA driver. In a previous successful login, the graphics were incredibly slow, but I was able to change the driver (via the 'additional drivers' GUI) from Nouveau to NVIDIA proprietary.
dkms status in my runlevel 3 terminal gives:
bbswitch, 0.7, 4.2.0-22-generic, x86_64: installed nvidia-352, 352.63, 4.2.0-22-generic, x86_64: installed
Also, I have read that permissions with .Xauthority can be a common problem, however, when I run
ls -lah, I have:
-rw------- 1 pwright pwright 54 Jan 4 12:37 .Xauthority
Any advice would be greatly appreciated!!