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voila une partie de mon /var/log/message
May 6 21:11:54 localhost kernel: [ 40.704332] CE: Reprogramming failure. Giving up
May 6 21:11:54 localhost kernel: [ 40.720300] CE: Reprogramming failure. Giving up
May 6 21:11:54 localhost kernel: [ 40.744241] CE: Reprogramming failure. Giving up
May 6 21:11:54 localhost kernel: [ 40.755219] CE: Reprogramming failure. Giving up
May 6 21:11:56 localhost dbus-daemon[710]: ** Message: No devices in use, exit
May 6 21:12:04 localhost systemd-logind[703]: Removed session 1.
May 6 21:12:12 localhost kernel: [ 58.843596] CE: Reprogramming failure. Giving up
May 6 21:12:12 localhost kernel: [ 58.866407] CE: Reprogramming failure. Giving up
May 6 21:12:12 localhost kernel: [ 58.888360] CE: Reprogramming failure. Giving up
May 6 21:12:12 localhost kernel: [ 58.917900] CE: Reprogramming failure. Giving up
May 6 21:12:12 localhost kernel: [ 58.923699] CE: Reprogramming failure. Giving up
May 6 21:12:12 localhost kernel: [ 58.950220] CE: Reprogramming failure. Giving up
May 6 21:12:12 localhost kernel: [ 58.967181] CE: Reprogramming failure. Giving up
May 6 21:12:12 localhost kernel: [ 58.974164] CE: Reprogramming failure. Giving up
May 6 21:12:12 localhost kernel: [ 58.983145] CE: Reprogramming failure. Giving up
May 6 21:12:12 localhost kernel: [ 58.992122] CE: Reprogramming failure. Giving up
May 6 21:12:12 localhost kernel: [ 59.001524] CE: Reprogramming failure. Giving up
May 6 21:12:12 localhost kernel: [ 59.009949] CE: Reprogramming failure. Giving up
May 6 21:12:12 localhost kernel: [ 59.019982] CE: Reprogramming failure. Giving up
May 6 21:12:12 localhost kernel: [ 59.042017] CE: Reprogramming failure. Giving up
May 6 21:12:12 localhost kernel: [ 59.054985] CE: Reprogramming failure. Giving up
May 6 21:12:12 localhost kernel: [ 59.084420] CE: Reprogramming failure. Giving up
May 6 21:12:12 localhost kernel: [ 59.089116] CE: Reprogramming failure. Giving up
May 6 21:12:12 localhost kernel: [ 59.101875] CE: Reprogramming failure. Giving up
May 6 21:12:12 localhost kernel: [ 59.114829] CE: Reprogramming failure. Giving up
May 6 21:12:12 localhost kernel: [ 59.123824] CE: Reprogramming failure. Giving up
May 6 21:12:13 localhost kernel: [ 59.141625] CE: Reprogramming failure. Giving up
May 6 21:12:13 localhost kernel: [ 59.156820] CE: Reprogramming failure. Giving up
May 6 21:12:13 localhost kernel: [ 59.169125] CE: Reprogramming failure. Giving up
May 6 21:12:13 localhost kernel: [ 59.176302] CE: Reprogramming failure. Giving up
May 6 21:16:04 localhost kernel: [ 290.509462] CE: Reprogramming failure. Giving up
May 6 21:16:05 localhost kernel: [ 290.593276] nouveau E[ PFIFO][0000:01:00.0] DMA_PUSHER - Ch 2 Get 0x002002e460 Put 0x002002e468 IbGet 0x00000154 IbPut 0x00000157 State 0xc0004608 (err: MEM_FAULT) Push 0x00400040
May 6 21:16:05 localhost kernel: [ 290.609237] CE: Reprogramming failure. Giving up
May 6 21:16:05 localhost kernel: [ 290.621209] nouveau E[ PFB][0000:01:00.0] trapped read at 0xfffffffffc on channel 0x0001fca0 PFIFO/PFIFO_READ/PUSHBUF reason: PT_NOT_PRESENT
May 6 21:16:05 localhost kernel: [ 290.626199] CE: Reprogramming failure. Giving up
May 6 21:16:05 localhost kernel: [ 290.638170] CE: Reprogramming failure. Giving up
May 6 21:16:05 localhost kernel: [ 290.656384] CE: Reprogramming failure. Giving up
May 6 21:16:05 localhost kernel: [ 290.689658] CE: Reprogramming failure. Giving up
May 6 21:16:05 localhost kernel: [ 290.706285] CE: Reprogramming failure. Giving up
May 6 21:16:05 localhost kernel: [ 290.714521] CE: Reprogramming failure. Giving up
May 6 21:17:03 localhost gnome-session[1406]: WARNING: Client '/org/gnome/SessionManager/Client6' failed to reply before timeout
May 6 21:17:03 localhost gnome-session[1406]: WARNING: Client '/org/gnome/SessionManager/Client5' failed to reply before timeout