Hi, I have a W520, too, and have exactly the same problems since an LTS->LTS upgrade to 14.04. I now at least have a semi-workaround when starting the display manager with two screens:
Using nvidia-settings, I was able to generate a xorg.conf file that starts with a working two-screen configuration, without panning. File is attached. I guess you'd either need to adjust the values specific to my setup, or try to use nvidia-settings to generate a fresh configuration file. Important hint is to click on 'Advanced...' at the bottom to get the panning configuration. However, when switching between single- and dual-screen modes, screen panning will reappear and I have not figured out how to solve that yet. Switching to single-screen mode works once, using xrandr --output LVDS-0 --mode 1600x900 --pos 0x0 --output DP-0 --off --output VGA-0 --off Hope this helps. ** Attachment added: "xorg.conf file working on W520 for dual screen without panning" https://bugs.launchpad.net/ubuntu/+source/xorg-server/+bug/1326688/+attachment/4269592/+files/xorg.conf -- You received this bug notification because you are a member of Desktop Packages, which is subscribed to xorg-server in Ubuntu. https://bugs.launchpad.net/bugs/1326688 Title: Can't disable panning on multiple monitors Status in “xorg-server” package in Ubuntu: Confirmed Bug description: System: Dell laptop E6520 with two graphic cards: 00:02.0 VGA compatible controller: Intel Corporation 2nd Generation Core Processor Family Integrated Graphics Controller (rev 09) (prog-if 00 [VGA controller]) 01:00.0 VGA compatible controller: NVIDIA Corporation GF119M [NVS 4200M] (rev a1) (prog-if 00 [VGA controller]) I have 3 monitors connected through docking stations, DP-0 and DP-1 connected to Nvidia card and VGA-1-0 connected to Intel card. I'm usind nvida-331 driver and nvidia-prime: nbr@nbr-nb:~$ dpkg --get-selections | grep nvidia nvidia-331 install nvidia-common install nvidia-libopencl1-331 install nvidia-opencl-icd-331 install nvidia-prime install nvidia-settings install I can setup correctly this triple-head config with Monitor Settings in Ubuntu Control Panel, but this enable panning as per xrandr output: nbr@nbr-nb:~$ xrandr -q | grep conn VGA-0 disconnected (normal left inverted right x axis y axis) LVDS-0 disconnected (normal left inverted right x axis y axis) DP-0 connected 1280x1024+0+0 (normal left inverted right x axis y axis) 376mm x 301mm panning 2560x1024+0+0 tracking 4240x1050+0+0 border 0/0/0/0 DP-1 connected primary 1680x1050+1280+0 (normal left inverted right x axis y axis) 433mm x 270mm panning 2960x1050+1280+0 tracking 4240x1050+0+0 border 0/0/0/0 HDMI-0 disconnected (normal left inverted right x axis y axis) DP-2 disconnected (normal left inverted right x axis y axis) DP-3 disconnected (normal left inverted right x axis y axis) LVDS-1-0 connected VGA-1-0 connected 1280x1024+2960+0 376mm x 301mm and it seems there is no way to disable it (even issuing xrandr with --panning 0x0+0+0 option to DP-0 and DP-1 has no effect). This was working correctly after a undock/dock of the laptop, maybe an update broke config since it has always showed problems with undock/dock, but a reboot always cured the situation. Now it can't be setup like initial config anymore (three indipendent monitors with no panning and windows moving around all monitors). other sysinfo: nbr@nbr-nb:~$ lsb_release -rd Description: Ubuntu 14.04 LTS Release: 14.04 nbr@nbr-nb:~$ apt-cache policy nvidia-331 nvidia-331: Installato: 331.38-0ubuntu7 nbr@nbr-nb:~$ apt-cache policy nvidia-prime nvidia-prime: Installato: 0.6.2 nbr@nbr-nb:~$ apt-cache policy xserver-xorg xserver-xorg: Installato: 1:7.7+1ubuntu8 To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/xorg-server/+bug/1326688/+subscriptions -- Mailing list: https://launchpad.net/~desktop-packages Post to : desktop-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~desktop-packages More help : https://help.launchpad.net/ListHelp
