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Re: Upgrade to Jessie lost all monitor resolutions except 1024x768

On Mon, 2015-11-30 at 23:11 -0800, Marc Shapiro wrote:
> In Wheezy, the graphics card seems to have been found and a depth of 
> 24bpp is being used by RADEON(0) with a GB of graphics memory, while
> in 
> Jessie, Screen 0 is getting deleted and the radeon module is removed.
> Instead of RADEON(0) we see FBDEV(0), instead of 24bbp, only 16bbp is
> being used.  Only 1536kB of video memory is being used and the screen
> size is set to "Virtual size is 1024x768 (pitch 1024)".
> I don't know enough to determine what is causing these differences,
> let 
> alone how to correct the problem.  If someone else can figure out a 
> solution I would be most grateful.

Most likely missing firmware as others have suggested, check dmesg and
grep for radeon and/or drm. 

Sven Arvidsson

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