Dec 25 17:17:56 u-HP-EliteBook-820-G2 kernel: [  103.728462] [drm:intel_dp_start_link_train] *ERROR* too many voltage retries, give up
Dec 25 17:17:56 u-HP-EliteBook-820-G2 kernel: [  103.733820] [drm:intel_dp_start_link_train] *ERROR* too many voltage retries, give up
Dec 25 17:17:56 u-HP-EliteBook-820-G2 kernel: [  103.734701] [drm:gen8_irq_handler] *ERROR* Pipe B FIFO underrun
Dec 25 17:17:56 u-HP-EliteBook-820-G2 kernel: [  103.739214] [drm:intel_dp_start_link_train] *ERROR* too many voltage retries, give up
Dec 25 17:17:56 u-HP-EliteBook-820-G2 kernel: [  103.745302] [drm:intel_dp_start_link_train] *ERROR* too many voltage retries, give up
Dec 25 17:17:56 u-HP-EliteBook-820-G2 kernel: [  103.750684] [drm:intel_dp_start_link_train] *ERROR* too many voltage retries, give up
Dec 25 17:17:56 u-HP-EliteBook-820-G2 kernel: [  103.756002] [drm:intel_dp_start_link_train] *ERROR* too many voltage retries, give up
Dec 25 17:17:56 u-HP-EliteBook-820-G2 kernel: [  103.761394] [drm:intel_dp_start_link_train] *ERROR* too many voltage retries, give up
Dec 25 17:17:56 u-HP-EliteBook-820-G2 kernel: [  103.761611] [drm:intel_dp_complete_link_train] *ERROR* failed to train DP, aborting
Dec 25 17:17:56 u-HP-EliteBook-820-G2 kernel: [  103.772430] [drm:intel_dp_start_link_train] *ERROR* too many voltage retries, give up
Dec 25 17:17:56 u-HP-EliteBook-820-G2 kernel: [  103.777789] [drm:intel_dp_start_link_train] *ERROR* too many voltage retries, give up
Dec 25 17:17:56 u-HP-EliteBook-820-G2 kernel: [  103.783135] [drm:intel_dp_start_link_train] *ERROR* too many voltage retries, give up
Dec 25 17:17:56 u-HP-EliteBook-820-G2 kernel: [  103.788471] [drm:intel_dp_start_link_train] *ERROR* too many voltage retries, give up
Dec 25 17:17:56 u-HP-EliteBook-820-G2 kernel: [  103.793786] [drm:intel_dp_start_link_train] *ERROR* too many voltage retries, give up
Dec 25 17:17:56 u-HP-EliteBook-820-G2 kernel: [  103.799826] [drm:intel_dp_start_link_train] *ERROR* too many voltage retries, give up
Dec 25 17:17:56 u-HP-EliteBook-820-G2 kernel: [  103.805219] [drm:intel_dp_start_link_train] *ERROR* too many voltage retries, give up
Dec 25 17:17:56 u-HP-EliteBook-820-G2 kernel: [  103.805434] [drm:intel_dp_complete_link_train] *ERROR* failed to train DP, aborting
Dec 25 17:17:57 u-HP-EliteBook-820-G2 kernel: [  105.458525] [drm:gen8_irq_handler] *ERROR* Pipe A FIFO underrun