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Re: Radeon HD 3450 X problem

On Wed, 15 Dec 2010, Mark Davies wrote:
> > Further to this: same thing happens whether I have drm enabled or
> > not in the kernel.  Same thing happens putting the card in an
> > Optiplex 760 and same thing happens with a Radeon HD 4550.
> It also happens with an RV380 based card that I know works fine
> under 5.1.
> In all cases the machine hangs when RADEONScreenInit() calls
>     /* Clear the framebuffer */
>     memset(info->FB + pScrn->fbOffset, 0,
>            pScrn->virtualY * pScrn->displayWidth *
> info->CurrentLayout.pixel_bytes);

I've just noticed that when I thought drm was not enabled in the 
current kernel it seems that it still was so the above _may_ only be 
happening with drm enabled.  What is the definitive way to disable 
drm in a current kernel?


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