On 26/10/17 16:23, Stefano Vergani wrote: > Hi all, > > > I have just upgraded Scientific Linux to version 7.4 and I have found an > issue I cannot fix. Anytime I lock my PC (ThinkPad Lenovo T440p) > pressing the lock icon or simply I close the PC without locking it or > shutting it down, I am not able anymore to return in my session. The > screen remains black and I have to press the on/off button for some > seconds until it reboots. > > How can I fix this? Anyone else with the same issue? Which graphic card do you have? Which drivers do you use? -- kind regards, David Sommerseth