Bugzilla – Bug 386545
Xinerama /randr: only cloned output possible; only partial output reproduced
Last modified: 2008-05-05 23:43:09 UTC
Hardware: Thinkpad X61s Eizo S2431 vial analogue input Problem: though extended desktop is configured in GNOME's resolution applet, output is cloned. Seemingly at random, sometimes the Eizo only displays a sector of the desktop (upper-left corner) at the correct 1920x-resolution (that I configured it to display)while the rest of the screen is black, and the laptop's TFT only displays that same sector (so the GNOME panel is unreachable on the desktop; at other times the laptops's TFT shows correctly a 1024x desktop and the Eizo reproduces that desktop in the centre of the screen. The desktops s o m e t i m e s cannot be arranged in the resolutioni applet but are shown as 100% overlapping; at other times they can be arranged but (of course?) this doesn't have any effect at all.
Please attach /etc/X11/xorg.conf, /var/log/Xorg.0.log and the output of 'xrandr'.
This happens as the 'virtual' statement is not added to xorg.conf. See http://en.opensuse.org/GNOME/Multiscreen for information on what's needed.
output of 'xrandr': xrandr Screen 0: minimum 320 x 200, current 1024 x 768, maximum 1024 x 1024 VGA disconnected 1024x768+0+0 (normal left inverted right x axis y axis) 0mm x 0mm 1024x768_60 60.0* 60.0* LVDS connected 1024x768+0+0 (normal left inverted right x axis y axis) 246mm x 185mm 1024x768 75.0* 70.1 60.0 832x624 74.6 800x600 72.2 75.0 60.3 640x480 72.8 75.0 60.0 59.9 Find xorg.conf and Xorg.0.log attached.
Created attachment 212389 [details] xorg.conf
Created attachment 212391 [details] Xorg.0.log
Ok. Add the virtual keyword to xorg.conf. Then run xrandr --output LVDS --left-of VGA If this works, it's a bug in gnome-display-properties.
OK; I've added the line Virtual "2944 1080" Was that correct. I get "xrandr: screen cannot be larger than 1024x1024 (desired size 2048x7638)"
No, you need to add Virtual 2944 1080 See http://en.opensuse.org/GNOME/Multiscreen.
The effect is that the 24" still only shows the 1024x desktop centered with a thick black frame around it, and the laptop-monitor only shows the top-left corner of a (I guess) 1920x desktop. Shouldn't all this be configured 'auto-magically'?
Since it's getting more and more obvious to me that you're not familiar with RANDR 1.2 at all, I recommend to use Sax2 for a static RANDR 1.2 configuration instead of trying to help testing the runtime RANDR 1.2 configuration via gnome-display-propoerties. SaX2 is prepared for the static RANDR 1.2 configuration of intel and radeonhd driver.
Wonderful ideal. I think I should have filed this bug under GNOME from the beginning because this is where the fault lies, not with randr: The sensational new gnome-resolution applet which is supposed to make Xinerama user-friendly is one big scam. If you would please re-assign the bug accordingly? Thank you.
This would be the assignee of Bug #374148. Hmm, I just noticed that the config of comment #4 is already a static RANDR 1.2 configuration. Unfortunately there are at least two bugs in it. 'Option "LeftOf" "EXT"' and 'Option "PreferredMode" "1920x1200"' need to be moved to the other Monitor section ("Monitor[0]"). Would be worth a try.