Luca, Ubuntu 18.04 now has mesa 20.0.8-0ubuntu1~18.04.1, is the issue
still reproducible?
** Changed in: mesa (Ubuntu)
Status: New => Incomplete
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https://bugs.launchpad.net/bugs/1835315
Title:
Vulkan funcionality broken when mesa is compiled with LLVM 8 in some
programs
Status in mesa package in Ubuntu:
Incomplete
Bug description:
Ubuntu version: 18.04.2 LTS
Mesa version: 19.0.2
Mesa-vulkan-driver version: 19.0.2, POLARIS10, DRM 3.27.0, 5.0.0-20-generic,
LLVM 8.0.0)
Video card: AMD RX 580 8GB,
There is an issue when the Vulkan mesa RADV drivers are compiled with
LLVM 8, due to an LLVM 8 bug, resulting in no visual output in some
programs using the RADV Vulkan backend
Upgrading to a mesa build compiled with LLVM 9, or reverting back to
the bionic version from bionic-updates (which uses LLVM 6) fixes the
problem.
Using the AMDVLK vulkan driver workarounds the problem too.
The program I have personally tested is RPCS3
I could put additional info about the LLVM bug but at this moment I do
not have the upstream reference
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