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I attempted a fresh install of Ubuntu Gnome 16.04 LTS yesterday via LiveDVD. The installation went smoothly, but upon boot I am presented with a black screen with a single line of text at the top that states :

[drm:radeon_init [radeon]] * ERROR * no UMS support in radeon module!

Then, after a few seconds it does to a grayish screen where i can move my cursor around but nothing else appears.

I've done a fair amount of research on this error but can't seem to find much help. I'm aware of the AMD/ATi driver issues people have been having surrounding the removal of fglrx and such, but the issues result in poor gpu performance. I can't boot. I can however boot it if I try it without installing.

I've tried turning "nomodeset" on and off, same outcome.

I also don't believe it has anything to do with the Gnome environment because other forums seem to show people having this issue in multiple different environments.

Please help, I'm at a loss! Thank you in advance for your help!!

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  • unix.stackexchange.com/questions/273471/… <- The comment there gives a suggestion that is worth trying. If you do and it doesn't work please edit you question and add that information.
    – user589808
    Jan 4, 2017 at 18:28

1 Answer 1

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I would try pressing tab when you get to the menu, then add this: radeon.dpm=0
I was in a similar boat and had success using this.

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  • I was getting absolutely no where and had to use radeon.modeset=0 switch in grub. Your fix above took care of my issues. Thanks! (FWIW, I have an AMD A6-5400K APU) Dec 14, 2017 at 2:49

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