Capturing methods to disable modesetting?

[Adam Williamson]

On Thu, 2009-08-20 at 12:54 -0400, James Laska wrote:
> Greetings gang,
> 
> While testing a radeon driver issue, I had to disable modesetting to
> help identify the scope of the problem.  Thankfully, all I had to do was
> follow along in the steps posted to
> https://fedoraproject.org/wiki/How_to_debug_Xorg_problems.
> 
> However, it seems that 'nomodeset' wasn't sufficient to disable
> modesetting on my radeon x300 adapter.  After quick inspection, it seems
> I needed to also provide "radeon.modeset=0".  There appear to be
> additional driver-specific modesetting parameters (nouveau, i915,
> radeonhd).  
> 
> Is it worth updating the above wiki page to include these driver
> specific tunables as well?

I believe this is actually a bug. nomodeset is supposed to be all you
need, but it's not working at present for some reason.

I think nomodeset is basically a no-op at present and just
'radeon.modeset=0' alone would do the job. I can't remember exactly what
it is that's causing nomodeset to fail.

If the bug's not going to be fixed soon, we should probably include this
information there too, yep.

-- 
Adam Williamson
Fedora QA Community Monkey
IRC: adamw | Fedora Talk: adamwill AT fedoraproject DOT org
http://www.happyassassin.net