Thomas H. George wrote: > A new jessie installation. Display problem so I tried to switch to xdm. > When this didn't work I tried to switch back to gdm3. No Go:
What was the display problem? > problem not fixed. > > What to do? Reinstall jessie? Continue experimenting with systemctl > commands? > > Any suggestions? Is X starting at all? Is X starting but applications unable to run upon it? All types of possibilities that I couldn't see in the words written. If X is failing to start look in the /var/log/Xorg.0.log file and see what errors are present there. Anecdote: Just Friday I helped a friend debug his laptop. He said his machine "would not boot". When I looked the machine booted fine and started X but using the VESA driver at a non-native resolution rather than using the nvidia driver he had been using. He had accidentally removed the kernel associated with his nvidia driver. That was Ubuntu and his Unity desktop would not display against the VESA driver because I assume lack of hardware acceleration. Installing the right kernel and nvidia drivers was what he needed to get Unity running again. The errors in /var/log/Xorg.0.log showed the nvidia failures. So now when people say gdm3 doesn't start I wonder if it really means that X isn't starting? Maybe. Bob
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