Secondary monitor and desktop effects don't work

[Guest]

Hi All,

I have upgraded my Kubuntu to 14.04 yesterday, and I have lost desktop effects and my secondary monitor. I have a Dell XPS L702X laptop with an integrated Intel HD 3000 and an Nvidia GeForce GT 550M:

$ lspci | grep VGA
00:02.0 VGA compatible controller: Intel Corporation 2nd Generation Core Processor Family Integrated Graphics Controller (rev 09)
01:00.0 VGA compatible controller: NVIDIA Corporation GF116M [GeForce GT 550M] (rev a1)

I have a VGA monitor connected to the DP1 port, but xrandr doesn't recognize it (the monitor connected via a DP->VGA adapter):

$ xrandr
Screen 0: minimum 320 x 200, current 1920 x 1080, maximum 32767 x 32767
LVDS1 connected 1920x1080+0+0 (normal left inverted right x axis y axis) 382mm x 215mm
   640x480        59.9  
VGA1 disconnected (normal left inverted right x axis y axis)
HDMI1 disconnected (normal left inverted right x axis y axis)
DP1 disconnected (normal left inverted right x axis y axis)
VIRTUAL1 disconnected (normal left inverted right x axis y axis)
  1920x1080 (0x48)  140.5MHz
        h: width  1920 start 1972 end 2007 total 2094 skew    0 clock   67.1KHz
        v: height 1080 start 1083 end 1089 total 1118           clock   60.0Hz

Till yesterday, adding a secondary monitor with xrandr worked (once xorg detected the secondary monitor automatically), but now I can't even add a mode for DP1:

$ sudo xrandr --addmode DP1 "1280x1024"
xrandr: cannot find mode "1280x1024"

Desktop effects is also gone. In desktop effects / advanced I see this:
Compositing type: OpenGL 2.0
QT graphics system: raster

The kernel is that that comes with 14.04:

$ uname -srvm
Linux 3.13.0-24-generic #46-Ubuntu SMP Thu Apr 10 19:11:08 UTC 2014 x86_64

I have no xorg dot conf, but I think the problem lies somewhere around the driver/setup. I have bumblebee installed (not sure if I need it at all...) and nvidia is disabled.

Generally everything works as usual, but setting up my X has been very painful for the last few upgrades... Please help me with this. Let me know if you need any further info to help. Thanks in advance!

[cmallam]

Funny, this worked out of the box in Ubuntu 14.04, but i, too can't get it working in Kubuntu 14.04 with the HDMI port. i am using the nVidia 331.38 driver in both cases. i just tried the VGA port, and it comes up and presents a new desktop on the VGA monitor without any configuration at all.

$ lspci | grep VGA
00:02.0 VGA compatible controller: Intel Corporation Core Processor Integrated Graphics Controller (rev 18)
01:00.0 VGA compatible controller: NVIDIA Corporation GF108M [GeForce GT 425M] (rev a1)

$ xrandr (HDMI connected)

Screen 0: minimum 320 x 200, current 1920 x 1080, maximum 32767 x 32767
LVDS1 connected primary 1920x1080+0+0 (normal left inverted right x axis y axis) 344mm x 193mm
1920x1080 60.0*+ 59.9
1680x1050 60.0 59.9
1600x1024 60.2
1400x1050 60.0
1280x1024 60.0
1440x900 59.9
1280x960 60.0
1360x768 59.8 60.0
1152x864 60.0
1024x768 60.0
800x600 60.3 56.2
640x480 59.9
VGA1 disconnected (normal left inverted right x axis y axis)
VIRTUAL1 disconnected (normal left inverted right x axis y axis)

xrandr (VGA connected)

Screen 0: minimum 320 x 200, current 3200 x 1080, maximum 32767 x 32767
LVDS1 connected primary 1920x1080+0+0 (normal left inverted right x axis y axis) 344mm x 193mm
1920x1080 60.0*+ 59.9
1680x1050 60.0 59.9
1600x1024 60.2
1400x1050 60.0
1280x1024 60.0
1440x900 59.9
1280x960 60.0
1360x768 59.8 60.0
1152x864 60.0
1024x768 60.0
800x600 60.3 56.2
640x480 59.9
VGA1 connected 1280x1024+1920+0 (normal left inverted right x axis y axis) 337mm x 270mm
1280x1024 60.0*+ 75.0
1280x960 60.0
1152x864 75.0 70.0
1024x768 75.1 70.1 60.0
832x624 74.6
800x600 72.2 75.0 60.3 56.2
640x480 75.0 72.8 66.7 60.0
720x400 70.1
VIRTUAL1 disconnected (normal left inverted right x axis y axis)