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From:   Alex Deucher <alexdeucher@gmail.com>
Date:   Thu, 21 Mar 2019 17:03:55 -0400
Message-ID: <CADnq5_O-sFxVsbxouJBRYi=H+RCmc0==jB7XVTifvWm-+EQLnQ@mail.gmail.com>
Subject: Re: Radeon HD 7450 brightness oversaturated
To:     Meelis Roos <mroos@linux.ee>
Cc:     LKML <linux-kernel@vger.kernel.org>,
        Maling list - DRI developers 
        <dri-devel@lists.freedesktop.org>,
        amd-gfx list <amd-gfx@lists.freedesktop.org>
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On Thu, Mar 21, 2019 at 4:41 PM Meelis Roos <mroos@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