Same issues on the RX 480 using amdgpu. Using my own build of 4.20-rc#, but otherwise the rest is debian unstable / experimental pkgs and on Debian Unstable as the primary dist.
glxinfo snippet
OpenGL renderer string: AMD Radeon (TM) RX 480 Graphics (POLARIS10, DRM 3.27.0, 4.20.0-rc1-csm, LLVM 7.0.1)
OpenGL core profile version string: 4.5 (Core Profile) Mesa 18.2.5
dmesg snippet
[drm] initializing kernel modesetting (POLARIS10 0x1002:0x67DF 0x1043:0x04FB 0xC7).
ATOM BIOS: 115-D000PIL-100
[ 3.951392] [drm] Found UVD firmware Version: 1.130 Family ID: 16
[ 3.952275] [drm] Found VCE firmware Version: 53.26 Binary ID: 3
[drm] Display Core initialized with v3.1.68!
[drm] Initialized amdgpu 3.27.0 20150101 for 0000:0b:00.0 on minor 0
--------------------------------------------------------------
Package: mesa
Version: 18.2.5-2
Severity: important
Dear Maintainer,
Mesa 18.1.9 worked perfectly in my system to play Stellaris and
Civilization VI.
With the recent upgrade to 18.2.5-1 and 18.2.5-2, both games have very big
issues:
- Stellaris completely garbled start screen.
- Civilization VI only shows a white window.
My hardware is a Radeon R9 380.
82:00.0 VGA compatible controller: Advanced Micro Devices, Inc. [AMD/ATI] Tonga
PRO [Radeon R9 285/380] (rev f1)
This bug may be related to #914267, but I open a different issue since
the hardware mentioned is different.
-- System Information:
Debian Release: buster/sid
APT prefers unstable
APT policy: (500, 'unstable'), (500, 'stable'), (1, 'experimental')
Architecture: amd64 (x86_64)
Foreign Architectures: i386
Kernel: Linux 4.18.0-2-amd64 (SMP w/12 CPU cores)
Locale: LANG=pt_BR.UTF-8, LC_CTYPE=pt_BR.UTF-8 (charmap=UTF-8) (ignored: LC_ALL
set to pt_BR.UTF-8), LANGUAGE=pt_BR.UTF-8 (charmap=UTF-8) (ignored: LC_ALL set
to pt_BR.UTF-8)
Shell: /bin/sh linked to /bin/dash
Init: systemd (via /run/systemd/system)
LSM: AppArmor: enabled