Radeon HD 7450 brightness oversaturated

[Meelis Roos]

>> 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

No, I just put the card in and tested with only the current kernels I had.
I can get some older kernel and test with that if that is of any help.

-- 
Meelis Roos <mroos at linux.ee>