(In reply to Thomas Zimmermann from comment #33) > (In reply to Takashi Iwai from comment #8) > > ../drivers/gpu/drm/drm_gem_shmem_helper.c:197 > > It's a ref-counting problem. From what it looks like, we're hitting a bug with dma-buf forwarding. The bugfix is at https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/drivers/gpu/drm/drm_gem_shmem_helper.c?h=v5.10&id=f49a51bfdc8ea717c97ccd4cc98b7e6daaa5553a We do have this fix in out tree. Since the problem seems to happen during installation, has the installer kernel been updated to include the fix as well?