black screen after boot

[Liam Proven]

On 4 November 2017 at 05:01, Bob <ubuntu-qygzanxc at listemail.net> wrote:
> I upgraded from 17.04 to 17.10 in a test partition on my laptop a Lenovo T60.
> When the upgrade was done I rebooted.  The system ran for a while with only a
> black screen.  Since nothing was happening I entered my password, nothing
> happened, I pressed some keys, nothing happened, at this point I assumed the
> upgrade had failed so I pressed the power button.  Pressing the power button
> caused the moon symbol on the laptop to light, this was a surprise so after the
> disk activity light stopped blinking I pressed the power button again.  This
> caused the login screen to display.  I did login and it appears that the system
> functions properly.
>
> Now any time I boot that system it comes up with a black screen and I have to
> press the power to put the system to sleep and then press the power button
> again to wake it up and display the login screen.
>
> Since I have not seen any messages about anyone having the problem I assume I
> am the only one with this problem.
>
> Anyone have an idea on how to fix this?

https://www.cnet.com/products/lenovo-thinkpad-t60/specs/

ATI graphics.

What desktop? If was Unity, it's now GNOME. GNOME defaults to Wayland.
Wayland won't work with ATI proprietary display drivers, but I have a
machine of that age with an ATI Mobility Radeon GPU and it works well
enough.

My GPU is no longer supported by fglrx so I didn't have them, but it's
a different one to yours and I don't know if yours are. Remove any
trace of them if so.

Also try adding the "nomodeset" line to your kernel parameters in GRUB.

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