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Normally, this message comes up when you are logged in as an un-authorized-X-server-user. This might happen, for instance, when one tries to do an su. In those cases, the correct procedure is to access the .Xauthority file of the real user of the X server. For instance, on my laptop, in order to allow access to the X-server when I become su, I have created ...


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No. You can run only "new" commands from remote shell that will use your display (X server). It can't be also used for running full featured graphical session, nor to view whole "Desktop" like VNC and it was never intended to.


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[ 2.696] (II) RADEON(G0): GPU accel disabled or not working, using shadowfb for KMS` [ 3.144] (EE) RADEON(G0): drmmode_do_crtc_dpms cannot get last vblank counter` in your Xorg.log seems to indicate a failure with your Radeon X1600 graphic card. firmware-linux-nonfree should be installed, providing the needed proprietary firmware for your ATi GPU. If it ...


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I believe these will show up as two separate X displays (typically 0.0 and 0.1) because they're on separate graphics cards. Try doing: DISPLAY=:0.1 xrandr See also https://wiki.archlinux.org/index.php/Multihead You can use xinerama, to use both simultaneously, or you can use traditional multi-head (but then you can't move windows between displays).



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