https://bugs.freedesktop.org/show_bug.cgi?id=103234
--- Comment #22 from Viktor Kecskes viktor.kecskes2@gmail.com --- (In reply to Marek Olšák from comment #18)
Possible fix: https://patchwork.freedesktop.org/patch/211876/
My bug has been disappeared. I use Fedora and there ara 2 different X11 drivers. The xorg-x11-drv-ati and xorg-x11-drv-amdgpu. I deleted the amdgpu x11 driver, and install the ati x11 driver. According to lsmod my system still use the amdgpu module.