You're right, here are what you asked, all taken from the TCE directly, not from within the X2Go session :

========================================================================= root@TCE-CLIENT-DELL-VOSTRO430-4D1ZR4J:~# xdpyinfo -display :0 name of display: :0 version number: 11.0 vendor string: The X.Org Foundation vendor release number: 11804000 X.Org version: 1.18.4 maximum request size: 16777212 bytes motion buffer size: 256 bitmap unit, bit order, padding: 32, LSBFirst, 32 image byte order: LSBFirst number of supported pixmap formats: 7 supported pixmap formats: depth 1, bits_per_pixel 1, scanline_pad 32 depth 4, bits_per_pixel 8, scanline_pad 32 depth 8, bits_per_pixel 8, scanline_pad 32 depth 15, bits_per_pixel 16, scanline_pad 32 depth 16, bits_per_pixel 16, scanline_pad 32 depth 24, bits_per_pixel 32, scanline_pad 32 depth 32, bits_per_pixel 32, scanline_pad 32 keycode range: minimum 8, maximum 255 focus: window 0x600005, revert to Parent number of extensions: 29 BIG-REQUESTS Composite DAMAGE DOUBLE-BUFFER DPMS DRI2 GLX Generic Event Extension MIT-SCREEN-SAVER MIT-SHM Present RANDR RECORD RENDER SECURITY SGI-GLX SHAPE SYNC X-Resource XC-MISC XFIXES XFree86-DGA XFree86-VidModeExtension XINERAMA XInputExtension XKEYBOARD XTEST XVideo XVideo-MotionCompensation default screen number: 0 number of screens: 1

screen #0: dimensions: 3840x1080 pixels (1016x285 millimeters) resolution: 96x96 dots per inch depths (7): 24, 1, 4, 8, 15, 16, 32 ... ...

========================================================================= root@TCE-CLIENT-DELL-VOSTRO430-4D1ZR4J:~# xrandr --display :0 Screen 0: minimum 320 x 200, current 3840 x 1080, maximum 8192 x 8192 DVI-I-1 connected 1920x1080+1920+0 (normal left inverted right x axis y axis) 510mm x 287mm 1920x1080 60.00*+ 1280x1024 75.02 60.02
1152x864 75.00
1024x768 75.08 60.00
800x600 75.00 60.32
640x480 75.00 60.00
720x400 70.08
HDMI-1 disconnected (normal left inverted right x axis y axis) VGA-1 connected 1920x1080+0+0 (normal left inverted right x axis y axis) 510mm x 287mm 1920x1080 60.00*+ 1280x1024 75.02 60.02
1152x864 75.00
1024x768 75.08 60.00
800x600 75.00 60.32
640x480 75.00 60.00
720x400 70.08

Regards, Walid Moghrabi

TRAVAUX.COM BAT I - PARC CEZANNE 2 290 AVENUE GALILEE - CS 80403 13591 AIX EN PROVENCE CEDEX 3

----- Mail original -----

De: "Ulrich Sibiller" <uli42@gmx.de> À: "Walid MOGHRABI" <w.moghrabi@servicemagic.eu> Cc: "Stefan Baur" <X2Go-ML-1@baur-itcs.de>, 1197@bugs.x2go.org Envoyé: Mercredi 26 Juillet 2017 12:10:42 Objet: Re: Bug#1197: Multihead fullscreen not working with TCE client in displaymanager mode

On Wed, Jul 26, 2017 at 12:05 PM, Walid MOGHRABI <w.moghrabi@servicemagic.eu> wrote:

That's what I did and it simply didn't work for a Ubuntu based image.

Most configuration switches for live-build script are not supported under Ubuntu and well, I don't remember every bits of what were working or not because I tried monthes ago but it was to tricky and except for Debian, it was simply unusable as is. As for the git repos, I tried many combinations and nothing worked as expected so I basicaly decided to do this by hand and take inspiration from the howto on what to install/tweak.

I ended with something that was not that complicated to do, scriptable (mostly) and working (except for this dual head stuff) so I stopped going the Live Build way, at least, just the time to sort out things and get back with some contributions on that part.

Let's not get distracted.

Back to your setup. You posted xpdyinfo output some days ago that clearly showed that the real X server on your TCE setup does not offer xinerama. And you posted xrandr output that showed multiple screens for the same X server. Just to be sure nothing got confused: please run both commands again on the TCE's X server. If it stays like this please check the X server's logfile for any randr or xinerama messages.

Uli

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