https://community.hpe.com/t5/operating-system-hp-ux/cde/m-p/2487948#M799737 It appears that your CDE is not resolving your hostname for the local display.<BR /><BR />Make sure you have an entry in your /etc/hosts for this machine.<BR /><BR />check your /etc/dt/config/Xservers for an entry for your machine. There is probably an entry at the bottom that begins with *. If not you will need to create it. The * is converted to hostname.<BR /><BR />After any changes, you will need to execute dtconfig -reset.<BR /><BR />Hope this helps.<BR /> Tue, 30 Jan 2001 14:13:14 GMT Joseph C. Denman 2001-01-30T14:13:14Z https://community.hpe.com/t5/operating-system-hp-ux/cde/m-p/2487947#M799736 Using HP-UX 10.20 CDE, I can work only with Failsafe Session, instead Regular Desktop. On /.dt/errorlog I find the following message:"<BR />I/O error on display:: :0.0"<BR />Is there any body can help me? Tue, 30 Jan 2001 12:49:26 GMT https://community.hpe.com/t5/operating-system-hp-ux/cde/m-p/2487947#M799736 Corbetta Ivan 2001-01-30T12:49:26Z https://community.hpe.com/t5/operating-system-hp-ux/cde/m-p/2487948#M799737 It appears that your CDE is not resolving your hostname for the local display.<BR /><BR />Make sure you have an entry in your /etc/hosts for this machine.<BR /><BR />check your /etc/dt/config/Xservers for an entry for your machine. There is probably an entry at the bottom that begins with *. If not you will need to create it. The * is converted to hostname.<BR /><BR />After any changes, you will need to execute dtconfig -reset.<BR /><BR />Hope this helps.<BR /> Tue, 30 Jan 2001 14:13:14 GMT https://community.hpe.com/t5/operating-system-hp-ux/cde/m-p/2487948#M799737 Joseph C. Denman 2001-01-30T14:13:14Z