Ubuntu X11 freezes

[mordox]

I recently upgraded my laptop from 16.10 to 17.04 . After the upgrade my X11 screen freezes after I log in. If I immediately switch to tty1 I'm able work with console commands. I tried looking into dmesg but didn't find anything. How can I troubleshoot this? FYI, the laptop is having radeon hardware. Its HP dm4 1041tx.

[mörgæs]

As always we should first try to narrow down if the problem is 17.04 itself or the upgrade process, so...
How does it work in a live boot of 17.04?

[ubfan1]

Anything in /var/log/Xorg.0.log (or any older copies with ".old" or a higher number)? Try killing the X server from a terminal, and restarting it, to see what errors are produced on the screen. If you have an /etc/X11/xorg.conf file, try renaming it, and restart the X server without the file.

[mordox]

I tried running a live cd. It is not able to start the graphical mode. Mouse and keyboard don't work.

[mörgæs]

What are the results from the advice in post 3?

[mordox]

Tried restarting lightdm didn't help. I see a kernel error on tty does that help in anyway?

274894

[mörgæs]

Did you try without xorg.conf (if the file was present)?

[mordox]

There was no xorg.conf file