Public bug reported:
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
** Affects: xorg-server (Ubuntu)
Importance: Undecided
Status: New
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https://bugs.launchpad.net/bugs/1326688
Title:
Can't disable panning on multiple monitors
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