so when I enable the pr_debug()s in kernel/module, and boot that kernel, I get a raft of messages (~800), like : [ 110.072535] module:find_symbol: Failed to find symbol drm_scdc_get_scrambling_status [ 110.072538] module:find_symbol: Failed to find symbol drm_scdc_read [ 110.072541] module:find_symbol: Failed to find symbol drm_scdc_set_high_tmds_clock_ratio [ 110.072545] module:find_symbol: Failed to find symbol drm_scdc_set_scrambling [ 110.072548] module:find_symbol: Failed to find symbol drm_scdc_write [ 110.072551] module:find_symbol: Failed to find symbol drm_self_refresh_helper_alter_state [ 110.072553] module:find_symbol: Failed to find symbol drm_self_refresh_helper_cleanup What is the potential importance of these ? clearly if it were a real problem, it wouldnt just be a debug message. Is there anything to fix here, either in local config, or in code ?