query: Ubuntu Core "Cannot open display:"
positive_passages.docid: 156254
positive_passages.text: How do you Xforward windows using ssh?
negative_passages.docid: 117483
negative_passages.text: Ubuntu open to black screen with blinking underscore character after release upgrade
negative_passages.docid: 65788
negative_passages.text: Blackscreen - failed to idle channel
negative_passages.docid: 107717
negative_passages.text: Ubuntu 11.04 unity / classic load fails - remains at background without toolbars / windows
negative_passages.docid: 52476
negative_passages.text: Can't convert HDMI to DisplayPort - root cause?
negative_passages.docid: 154702
negative_passages.text: Ubuntu 18.10 shows black screen with blinking cursor after I rebooted a Thinkpad with hybrid GPUs
negative_passages.docid: 51315
negative_passages.text: How to turn off the display via the command line?
negative_passages.docid: 81666
negative_passages.text: Trying to open minecraft in ubuntu
negative_passages.docid: 16062
negative_passages.text: Experiencing major issues on graphic displays
negative_passages.docid: 82979
negative_passages.text: gksu: Gtk-WARNING **: cannot open display: :0
negative_passages.docid: 115017
negative_passages.text: Black screen after clicking "Install Ubuntu"
negative_passages.docid: 50610
negative_passages.text: GDBus.Error when trying to enable second screen
negative_passages.docid: 135382
negative_passages.text: Ubuntu won't boot - kernel error?
negative_passages.docid: 72362
negative_passages.text: Fixing display issues on Intel 82845GL
negative_passages.docid: 63772
negative_passages.text: I can't boot into a usable system after updates. What should I do?
negative_passages.docid: 44245
negative_passages.text: xUbuntu Default desktop Icons do not display?
negative_passages.docid: 101206
negative_passages.text: Cannot access secondary GPU - error: Could not load GPU driver