Vulkan problems

[richi902]

so far mostly none of the games i tried so far are working.
when i put vulkaninfo into the sakura terminal emulator i get lots of errors.
my gpu is a AMD HD7750 1GB. the installation with the script went smooth.

ERROR: ld.so: object '/usr/lib32/i386-linux-gnu/libmodeswitch_inhibitor.so' from LD_PRELOAD cannot be preloaded (cannot open shared object file): ignored.
ERROR: ld.so: object '/home/steam/.steam/ubuntu12_32/gameoverlayrenderer.so' from LD_PRELOAD cannot be preloaded (wrong ELF class: ELFCLASS32): ignored.
ERROR: [Loader Message]: Code 0 : /usr/lib/i386-linux-gnu/libvulkan_radeon.so wrong ELF class: ELFCLASS32
ERROR: [Loader Message]: Code 0 : /usr/lib/i386-linux-gnu/libvulkan_intel.so wrong ELF class: ELFCLASS32
ERROR: [Loader Message]: Code 0 : /home/steam/.steam/ubuntu12_32/steamoverlayvulkanlayer.so wrong ELF class: ELFCLASS32
ERROR: [Loader Message]: Code 0 : /home/steam/.steam/ubuntu12_32/libVkLayer_steam_fossilize.so wrong ELF class: ELFCLASS32
/build/vulkan-UL09PJ/vulkan-1.1.70+dfsg1/demos/vulkaninfo.c:2700: failed with VK_ERROR_INITIALIZATION_FAILED

[richi902]

i think i fixed it. i forgot that for the HD7XXX series, vulkan seems to be disabled by default. i had to add some boot parameters in the grub config.

GRUB_CMDLINE_LINUX_DEFAULT="radeon.cik_support=0 amdgpu.cik_support=1 radeon.si_support=0 amdgpu.si_support=1"