Hello, version 1.8.4-1~deb9u1 (security backport for Debian 9.8) seems to be ok also.
Markus 01:00.0 VGA compatible controller: Advanced Micro Devices, Inc. [AMD/ATI] Heathrow XT [Radeon HD 7870M] xserver-xorg 1:7.7+19 xserver-xorg-core 2:1.19.2-1+deb9u5 xserver-xorg-video-radeon 1:7.8.0-1+b1
