On Sun, 2019-09-01 at 12:16 +0100, Mick wrote: > On Saturday, 31 August 2019 23:41:13 BST Tamer Higazi wrote: > > Hi people, > > > > For a specific time I have a very strange behaviour on gentoo. > > I cannot start any applicaion on xfce, just logout or shutdown the > > machine. > > > > When I try through an existing open shell to execute a program I > > get > > this error: > > > > tamer@tux / $ firefox-bin > > No protocol specified > > Error: cannot open display: :0.0 > > > > Can somebody tell me what's wrong here? > > > > > > best, Tamer > > It may be related to an obscure old networkmanager bug, whereby it > changes the > hostname in /etc/hosts. I don't use networkmanager and I don't use > xfce to > comment on particulars, but here's some generic things to check: > > 1. Have a look at the 'Host and domain information' section and at > the 'The > hosts file' section in the handbook and configure them accordingly: > > https://wiki.gentoo.org/wiki/Handbook:AMD64/Installation/System > > 2. Does 'echo $HOSTNAME' show what you have configured in your > system, after > you restart networkmanager, or reboot? > > 3. Have you added /etc/init.d/hostname to your boot runlevel? >
Also check if your system is actually running the X server on :0. If it's running on :1 or higher for some reason then you'll need to update your DISPLAY variable. Just how you would have gotten it into such a state I wouldn't care to guess at without more information. LMP
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