Poor 2D graphics performance for new AMD cards

[freem]

This 2D bug on new AMD cards (2014 - 2018 release):
- Radeon HD 7XXX;
- Radeon R5, R7, R9 series;
- Radeon RX 400, RX 500 series
with RADEON Driver - from Catalyst v15.7 to RADEON Crimson v18.7.1 (all versions)

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Video demonstration this problem:

Experiment #1:

RADEON R7 360 with "Standard VGA Graphics Adapter" (without Radeon driver)
Desktop: FPS = 800-860
Viewing the Spectrum foobar2000: FPS = 750-780
Scaling in P-CAD: FPS = 700-800

Normal 2D performance!

Experiment #2:

RADEON R7 360 with Radeon driver v18.7.1
Install driver - win7-32bit-radeon-software-adrenalin-edition-18.7.1-july12.exe

Desktop: FPS = 1280-1320
Viewing the Spectrum foobar2000: FPS = 27-54
Scaling in P-CAD: FPS = 10-1300

Very low 2D performance!

Resume: "Standard VGA Graphics Adapter" works 10-50 times faster, than the RADEON driver
on 2D classic theme Windows 7. NVidia and Intel card there are no problems!
Unfortunately, the bug low 2D performance is present on RADEON drivers only.

Video from camera (15 min):

 

[freem]

Very low 2D GDI performance AMD RADEON drivers v15.7 - 18.7.1 (all versions)
Date: 11.08.2018

AMD forum:
https://community.amd.com/thread/230437
https://community.amd.com/thread/227931

2D Test with source code:
https://github.com/JMKh3r/2DTest/releases/tag/1.3.0.0

SimpleGLUT with source code:
http://rgho.st/87wYV9wgB

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Test #1:

ASUS RADEON R7 360 2G
with Radeon driver v15.7.1

FPS = 4 - 1100
Lags when moving window = Very big

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Test #2:

ASUS RADEON R7 360 2G
with "Standard VGA Graphics Adapter" (without Radeon driver)

FPS = 510 - 720
Lags when moving window = No lags