Radeon HD 7450 brightness oversaturated

[Alex Deucher]

On Thu, Mar 21, 2019 at 4:41 PM Meelis Roos <mroos at linux.ee> wrote:
>
> I decided to put a discrete graphics card into a PC and found a fitting Radeon HD 7450.
> It works, but there is strange whiteness like the brightness is oversaturated and
> light places turn into other colors:
> * on fbcon, right after radeondrmfb initializes
> * in X after powersave
>
> The colors return to normal after a VT switch or two.
>
> Screenshot of one such washed view is at http://kodu.ut.ee/~mroos/radeon_washed.jpg
>
> Kernels are 5.0 and 5.1-rc1.

Is it just kernels 5.0 and 5.1?  There haven't really been any display
related changes to radeon in ages.  Possibly a duplicate of:
https://bugzilla.kernel.org/show_bug.cgi?id=198123

Alex